All Tools · Complete Index

All tools, A–Z

Every one of the 867 free RECATOOLS utilities, alphabetical. Looking to filter by category instead? Use the tools grid.

#

.gitignore Generator Developer Tools
1031 Exchange Calculator Finance & Money
16-Type Compatibility Matrix Personality Tests
16-Type Famous People Personality Tests
16-Type Personality Test Personality Tests
24 Solar Terms Reference (二十四节气) Chinese Culture & Almanac
36 Stratagems Flashcard Trainer (三十六计闪卡) Chinese Culture & Almanac
401(k) Contribution Calculator Finance & Money
401(k) Match Optimizer Finance & Money
50/30/20 Budget Splitter Finance & Money
529 College Savings Plan Calculator Finance & Money
中文词语解谜器 Text Tools
九型人格测试 Personality Tests
九型人格測驗 Personality Tests
五大性格测试 Personality Tests
五大性格特質測驗 Personality Tests
何倫職業興趣測驗 Personality Tests
依恋类型测试 Personality Tests
依戀類型測驗 Personality Tests
十六型人格测试 Personality Tests
十六型人格測驗 Personality Tests
情緒智力測驗 Personality Tests
情绪智力测试 Personality Tests
被欣賞方式測驗 Personality Tests
被欣赏方式测试 Personality Tests
霍兰德职业兴趣测试 Personality Tests

A

A/B Test Sample Size Calculator Finance & Money
A/B Test Significance Calculator Finance & Money
Age Calculator Fun & Misc
Age Difference Calculator Family & Heritage
Agent Skill Scaffolder AI Tools
AI & LLM Glossary AI Tools
AI Coding Rules Builder AI Tools
AI Image Aspect Ratio Calculator AI Tools
AI Image Seed Generator AI Tools
AI Music & Lyrics Prompt Builder AI Tools
AI Prompt Builder Developer Tools
AI-Crawler robots.txt Builder AI Tools
Air-Conditioner Sizing & Running Cost Calculator Sustainability & Environment
Air-Fryer Conversion Calculator Cooking & Food
Airbnb ROI Calculator Finance & Money
Alcohol BAC Calculator Health & Fitness
Allele Frequency Calculator Science
Altman Z-Score Calculator (Bankruptcy Prediction) Finance & Money
Amino Acid Lookup Science
Ancestor Count Calculator Family & Heritage
Anchor Scope Calculator Outdoors & Recreation
Anion Gap Calculator (with Albumin Correction) Medical · Clinical Formulas
Annual Luck Fortune (流年运势) Chinese Culture & Almanac
Appreciation Styles Test Personality Tests
APR / APY Converter Finance & Money
Area & Perimeter Calculator Mathematics
Area Calculator Converters & Units
ARM vs Fixed Mortgage Calculator Finance & Money
ASEAN + APAC Phone Number Validator Converters & Units
Aspect Ratio Calculator Mathematics
Asset Allocation Calculator Finance & Money
Attachment Style Test Personality Tests
Attendance Percentage Calculator Education & Students
Auspicious Date Selector (黄道吉日) Chinese Culture & Almanac

B

Baby Growth Percentile Calculator Health & Fitness
Baby-Parent Zodiac Compatibility (父母子女生肖) Chinese Culture & Almanac
Bagua House Analysis (八卦看屋) Chinese Culture & Almanac
Bahasa Indonesia ↔ Bahasa Malaysia Converter Text Tools
Baker’s Percentage & Hydration Calculator Cooking & Food
Baking Pan Size Converter Cooking & Food
Base64 Encoder / Decoder Developer Tools
Basic Calculator Mathematics
Bazi Chart Calculator (八字排盘) Chinese Culture & Almanac
Bazi Compatibility Match (八字合婚) Chinese Culture & Almanac
Bazi Favorable Element (Xiyongshen) Finder Chinese Culture & Almanac
Bazi Ten Gods Analyzer (八字十神) Chinese Culture & Almanac
Bcrypt Generator & Checker Crypto & Web3
Beam Deflection Calculator Engineering
Beer ABV Calculator Cooking & Food
Beer-Lambert Law Calculator Science
Bernoulli Equation Calculator Engineering
Bi-Weekly Mortgage Calculator Finance & Money
Big Five Personality Test Personality Tests
Binary Calculator Mathematics
Bitcoin Converter Crypto & Web3
Black-Scholes Option Pricing Calculator Finance & Money
Blood Type Inheritance Calculator Family & Heritage
Blood Type Personality Fun & Misc
BMI Calculator Health & Fitness
Body Fat Calculator Health & Fitness
Body Surface Area Calculator (BSA) Medical · Clinical Formulas
Bolt Torque Calculator (ISO Metric) Engineering
Bond Convexity Calculator Finance & Money
Bond Duration Calculator (Macaulay + Modified) Finance & Money
Bond Yield Calculator Finance & Money
Bone Weight Fortune Calculator (袁天罡稱骨) Chinese Culture & Almanac
Break-Even Calculator Finance & Money
Break-Even Units Calculator Finance & Money
Brick Calculator Home & Garden
BRRRR Calculator (Buy-Rehab-Rent-Refinance-Repeat) Finance & Money
BTU Calculator Home & Garden
Budget Planner Finance & Money
Burn Rate & Runway Calculator Finance & Money
Business Entity Tax Comparison Finance & Money
Business Loan Payment Calculator Finance & Money
Business Opening Date Selector (开业吉日) Chinese Culture & Almanac

C

CAC / Payback Period Calculator Finance & Money
Caffeine Half-Life Calculator Health & Fitness
Calorie Calculator Health & Fitness
Calories Burned Calculator Health & Fitness
Cangjie Input Code Lookup (倉頡) Text Tools
Cantilever Beam Deflection Calculator Engineering
Cantonese Converter (Basic) Text Tools
Cantonese Jyutping Converter (粤拼) Chinese Language & Script
Cantonese Yale Converter (耶鲁拼音) Chinese Language & Script
Cap Rate Calculator Finance & Money
Cap Table Simulator Finance & Money
CAPEX to OPEX Calculator (IT Financing) Finance & Money
Capital Gains Tax Calculator Finance & Money
CAPM Calculator (Cost of Equity) Finance & Money
Car Affordability Calculator Auto & Transport
Car Depreciation Calculator Auto & Transport
Car Lease vs Buy Calculator Auto & Transport
Car Loan / Auto Financing Calculator Auto & Transport
Carbon Footprint Calculator Sustainability & Environment
Carpet Calculator Home & Garden
Cash Conversion Cycle Calculator Finance & Money
Cash-on-Cash Return Calculator Finance & Money
Cat Age Calculator (Human Years) Pets & Animals
Cell Cycle Timing Calculator Science
CGPA to Percentage Converter Education & Students
CHA₂DS₂-VASc Score Calculator Medical · Clinical Formulas
Character Counter Text Tools
Chess Notation Converter Fun & Misc
Chess Opening Explorer Fun & Misc
Chi-Square Test Calculator Mathematics
Child Tax Credit Calculator Finance & Money
China Individual Income Tax Calculator Finance & Money
China Province Lookup (中国省份查询) Converters & Units
China Resident ID Format Validator (中国身份证) Converters & Units
China Social Insurance (五险一金) Calculator Finance & Money
Chinese Age Calculator (Nominal & Actual) Chinese Culture & Almanac
Chinese AI Agent Prompt Builder AI Tools
Chinese AI Art Prompt Weight Editor AI Tools
Chinese AI Glossary (中英对照) AI Tools
Chinese AI Image Model Comparison AI Tools
Chinese AI Image Prompt Builder AI Tools
Chinese AI Pricing Cheatsheet AI Tools
Chinese AI Prompt Builder AI Tools
Chinese AI Video Model Comparison AI Tools
Chinese AI Video Prompt Builder AI Tools
Chinese Art Style Mixer (AI Image Prompts) AI Tools
Chinese Auspicious Hours (Shichen) Chinese Culture & Almanac
Chinese Baby Name Suggester (中文起名宝典) Chinese Culture & Almanac
Chinese Business Name Analyzer (公司起名笔画) Chinese Culture & Almanac
Chinese Chain-of-Thought (CoT) Prompt Builder AI Tools
Chinese Character Divination (測字, for fun) Chinese Culture & Almanac
Chinese Character Encoding Lookup (Big5/GB/Unicode) Developer Tools
Chinese Character Frequency & Coverage (汉字使用频率) Chinese Language & Script
Chinese Character Riddles (字謎大全) Fun & Misc
Chinese Characters by Learning Order (汉字学习顺序) Chinese Language & Script
Chinese Chengyu Idiom Finder (成语词典) Chinese Language & Script
Chinese Clan Generation Poem Lookup (字辈查询) Chinese Culture & Almanac
Chinese Color Symbolism (中国传统色彩文化) Chinese Culture & Almanac
Chinese Converter Text Tools
Chinese Date Format Converter (中文日期格式) Chinese Culture & Almanac
Chinese Easily-Confused Characters (易混汉字) Chinese Language & Script
Chinese Festival Countdown Chinese Culture & Almanac
Chinese Few-Shot Example Formatter AI Tools
Chinese Folk Symbols Guide (中国民俗符号图鉴) Chinese Culture & Almanac
Chinese Greeting Generator (吉祥話/賀詞) Chinese Culture & Almanac
Chinese Headline Prompt Builder AI Tools
Chinese Homophones Finder (同音字查询) Chinese Language & Script
Chinese Idiom Chain Game (成語接龍) Fun & Misc
Chinese Internet Slang Decoder (网络用语翻译) Chinese Language & Script
Chinese Kinship Calculator (亲戚称谓计算器) Chinese Culture & Almanac
Chinese Knot Pattern Guide (中国结图解) Chinese Culture & Almanac
Chinese LLM Comparison AI Tools
Chinese LLM Token & Cost Calculator AI Tools
Chinese Lucky Number Checker (吉祥数字) Chinese Culture & Almanac
Chinese Lunar Birthday Finder Chinese Culture & Almanac
Chinese Lunar Festival Calendar (中国传统节日历) Chinese Culture & Almanac
Chinese Measure Word Picker (量词选择器) Chinese Language & Script
Chinese Name 5-Grid Analyzer (姓名三才五格) Chinese Culture & Almanac
Chinese Name Generator Fun & Misc
Chinese Name Romanizer (Passport Pinyin) Text Tools
Chinese Negative Prompt Builder (AI Image) AI Tools
Chinese Number Culture (中国数字文化) Chinese Culture & Almanac
Chinese Perpetual Calendar (萬年曆) Chinese Culture & Almanac
Chinese Poetry Line Search (詩詞名句) Chinese Language & Script
Chinese Polyphone Lookup Education & Students
Chinese Prompt Normalizer AI Tools
Chinese Proverb Dictionary (諺語俗語) Chinese Language & Script
Chinese Punctuation Converter (全角 ↔ 半角) Chinese Language & Script
Chinese Punctuation Rules Checker (中文标点规范) Chinese Language & Script
Chinese RAG Prompt Builder AI Tools
Chinese Resume Prompt Builder AI Tools
Chinese Rhyme Dictionary (押韵字典) Chinese Language & Script
Chinese Roleplay Character Card Builder AI Tools
Chinese Stroke Order Animator (汉字笔顺动画) Chinese Language & Script
Chinese Surname Origin (百家姓查询) Chinese Culture & Almanac
Chinese Synonyms & Antonyms Education & Students
Chinese System Prompt Builder AI Tools
Chinese Tea Brewing Timer (中国茶冲泡计时器) Chinese Culture & Almanac
Chinese Text Cleaner (中文文本清洗) Chinese Language & Script
Chinese Tongue Twisters (繞口令) Fun & Misc
Chinese Typing Speed Test Fun & Misc
Chinese Typo Checker (Reference) Text Tools
Chinese Variant Character Lookup (異體字) Text Tools
Chinese Vertical Text Formatter (中文竖排) Chinese Language & Script
Chinese Wedding Bride Price (聘金计算) Chinese Culture & Almanac
Chinese Word Formation (组词) Education & Students
Chinese Zodiac Calculator Family & Heritage
Chinese Zodiac Compatibility (生肖配对) Chinese Culture & Almanac
Chinese Zodiac Year Lookup (生肖年查询) Chinese Culture & Almanac
Chinese-English Idiom Bilingual Search (中英成语对照) Chinese Language & Script
chmod Calculator Developer Tools
CIDR / IP Range Calculator Cybersecurity Tools
Circle Calculator Mathematics
Citation Generator Education & Students
Classical Chinese Glossary (文言文虚词词典) Chinese Language & Script
Classical Chinese Particle Helper (文言虚词) Chinese Language & Script
Closing Cost Calculator (Mortgage) Finance & Money
Coast FIRE Calculator Finance & Money
Cockcroft-Gault Creatinine Clearance Calculator Medical · Clinical Formulas
Code Case Converter Developer Tools
Coffee-to-Water Ratio Calculator Cooking & Food
Cohort Retention Calculator Finance & Money
Coin Flip Fun & Misc
College Savings Calculator Education & Students
Color Blindness Simulator Developer Tools
Color Converter Developer Tools
Color Palette Generator Fun & Misc
Colour Code Converter Converters & Units
Colour Palette Extractor Image & File
Colour Picker Developer Tools
Commute Emissions Comparison Calculator Sustainability & Environment
Complex Number Calculator Mathematics
Compound Interest Calculator Finance & Money
Conception Date Estimator Health & Fitness
Concrete Calculator Home & Garden
Concrete Mix Ratio Calculator (1:2:3) Home & Garden
Confidence Interval Calculator Mathematics
Conflict Style Test Personality Tests
Context Window Visualizer AI Tools
Conversion Rate / Funnel Calculator Finance & Money
Cooking Measurement Converter Cooking & Food
Cooking Unit Converter Cooking & Food
Corrected Calcium (Albumin-Adjusted) Calculator Medical · Clinical Formulas
Correlation Calculator (Pearson + Spearman) Mathematics
Countdown Timer Fun & Misc
Cousin Relationship Calculator Family & Heritage
Covered Call Calculator Finance & Money
Coze Bot Prompt Builder AI Tools
CPF Contribution Calculator (Singapore) Finance & Money
CPM / CPC / CPA Ad Cost Calculator Finance & Money
Credit Card Min-Payment Trap Calculator Finance & Money
Credit Card Rewards Comparison Calculator Finance & Money
Credit Utilization Calculator (Per-Card + Overall) Finance & Money
Cricket Net Run Rate (NRR) Calculator Sports
Cron Builder & Expression Reader Developer Tools
Crosswind & Headwind Component Calculator Outdoors & Recreation
Crypto DCA Calculator Finance & Money
Crypto Profit Calculator Crypto & Web3
Crypto Staking Returns Calculator Finance & Money
Crypto Tax Calculator Finance & Money
CSS Box-Shadow Generator Developer Tools
CSS Clip-Path Generator Developer Tools
CSS Cubic-Bezier Editor Developer Tools
CSS Em/Rem/PX Converter Developer Tools
CSS Gradient Generator Developer Tools
CSV Viewer Developer Tools
CURB-65 Pneumonia Severity Calculator Medical · Clinical Formulas
Currency Converter Finance & Money
Currency Notation Converter Converters & Units
Custom GPT Instructions Builder AI Tools
Customer LTV Calculator Finance & Money
CVSS 3.1 Base Score Calculator Cybersecurity Tools
Cycling FTP Calculator Health & Fitness
Cycling Power Calculator Sports

D

Daily Chinese Almanac (Huangli) Chinese Culture & Almanac
Daily Horoscope (Western Zodiac) Fun & Misc
Daily Idiom Puzzle (每日成语) Fun & Misc
Data Storage Converter Converters & Units
Date Add/Subtract Calculator Converters & Units
Date Difference Calculator Converters & Units
DCA / SIP Calculator Finance & Money
DCF Calculator (Discounted Cash Flow Valuation) Finance & Money
Debt Snowball vs Avalanche Calculator Finance & Money
Debt-to-Equity Ratio Calculator (D/E) Finance & Money
Decision Maker Fun & Misc
Decision Matrix Calculator Career & Work
Deck Board Calculator Home & Garden
DeepSeek Prompt Builder AI Tools
DeFi Yield / APY Calculator Finance & Money
Delete PDF Pages Image & File
Density Altitude Calculator Outdoors & Recreation
Density Calculator Science
Derivative Calculator Mathematics
Dew Point Calculator Outdoors & Recreation
Dice Roller Fun & Misc
Diet / Food Carbon Footprint Calculator Sustainability & Environment
Dilution Calculator Science
Dim Sum Dish Guide (港式点心指南) Chinese Culture & Almanac
Disability Insurance Calculator (ASEAN — SOCSO/CareShield/MPF) Finance & Money
Disability Insurance Needs Calculator (US — Income-Replacement Gap) Finance & Money
DISC Personality Test Personality Tests
Discount Calculator Finance & Money
Dividend Discount Model Calculator (DDM) Finance & Money
Dividend Yield + Reinvestment Calculator Finance & Money
DMARC + SPF + DKIM Checker Cybersecurity Tools
DNS Lookup Cybersecurity Tools
Docker Compose Converter Developer Tools
Dog Age Calculator (Human Years) Pets & Animals
Dog Chocolate Toxicity Calculator Pets & Animals
Dog Pregnancy / Whelping Due-Date Calculator Pets & Animals
Doubao Prompt Builder AI Tools
Douyin Script Prompt Builder AI Tools
Down Payment Goal Calculator Finance & Money
Drawdown Calculator Finance & Money
Drywall Sheet Calculator Home & Garden
DSO (Days Sales Outstanding) Calculator Finance & Money
Due Date Calculator Health & Fitness
Duplicate Line Remover Text Tools
DuPont Analysis Calculator (3 + 5 Factor ROE) Finance & Money

E

E-commerce Copy Prompt Builder AI Tools
Effect Size Calculator (Cohen's d + Hedges' g) Mathematics
Effective Annual Rate (EAR) Calculator Finance & Money
eGFR Calculator (CKD-EPI 2021) Medical · Clinical Formulas
Eisenhower Matrix Career & Work
Email Normalizer Developer Tools
Embedding Cost Calculator AI Tools
Emotional Intelligence Test Personality Tests
Empirical & Molecular Formula Calculator Science
English Family Relationship Calculator Family & Heritage
English Name Generator Fun & Misc
English Name Suggester Fun & Misc
Enneagram Type Finder Personality Tests
EPF, SOCSO & EIS Calculator (Malaysia) Finance & Money
Equity Dilution Calculator Finance & Money
ERA Calculator (Earned Run Average) Sports
ERNIE Prompt Builder AI Tools
ESPP Calculator (Discount + Lookback Return) Finance & Money
ETH Unit Converter Crypto & Web3
Ethereum Gas Fee Calculator — Transaction Cost Crypto & Web3
Ethereum Gas Fee Converter — Gwei ↔ ETH ↔ USD Finance & Money
Euler Buckling Load Calculator Engineering
EV Home Charging Cost Calculator Auto & Transport
EXIF Viewer Image & File
Exponent Calculator Mathematics

F

Factoring Calculator Mathematics
Family Tree Builder (家谱图生成器) Chinese Culture & Almanac
Fancy Text Generator Fun & Misc
Fantasy Football Scoring Calculator (PPR / Half / Std) Sports
Favicon Generator Developer Tools
FDE Readiness Checker Career & Work
Federal Income Tax Bracket Calculator Finance & Money
Fence Calculator Home & Garden
Feng Shui Luopan Reader (风水罗盘) Chinese Culture & Almanac
Few-Shot Example Formatter AI Tools
File Size Converter Converters & Units
Final Exam Score Required Calculator Education & Students
Find and Replace Text Tools
FIRE Number Calculator Finance & Money
Five Elements Personality (五行格命) Chinese Culture & Almanac
Fix and Flip Calculator (House Flipping ROI) Finance & Money
Flight Carbon Emissions & Offset Calculator Sustainability & Environment
Food Picker — Hong Kong Food & Travel
Food Picker — Indonesia Food & Travel
Food Picker — Macau Food & Travel
Food Picker — Malaysia Food & Travel
Food Picker — Singapore Food & Travel
Food Picker — Taiwan Food & Travel
Food Picker — Thailand Food & Travel
Food Picker — Vietnam Food & Travel
Food Picker — What to Eat Food & Travel
Forex Pip Value + Lot Size Calculator Finance & Money
Fraction Calculator Mathematics
Free Cash Flow Calculator (FCFF + FCFE) Finance & Money
Freelancer Hourly Rate Calculator Finance & Money
Friedewald LDL Calculator Medical · Clinical Formulas
Fuel Economy Calculator Auto & Transport
Function-Calling Schema Builder AI Tools

G

Gas / Fuel Cost Calculator Finance & Money
GCD + LCM Calculator Mathematics
Gear Ratio Calculator (Multi-Stage) Engineering
Generation Calculator Family & Heritage
Genetic Code Table Science
Gibbs Free Energy Calculator Science
Glasgow Coma Scale (GCS) Calculator Medical · Clinical Formulas
GLM Prompt Builder AI Tools
Golf Handicap Calculator (World Handicap System) Sports
GPA Calculator Education & Students
Gravel / Mulch / Topsoil Calculator Home & Garden
Gross Rent Multiplier (GRM) Calculator Finance & Money
GST & Tax Calculator Finance & Money
Guandi Oracle Lottery (關帝靈籤) Chinese Culture & Almanac
Guanyin Oracle Lottery (觀音靈籤) Chinese Culture & Almanac
Gutter and Downspout Calculator Home & Garden

H

Hailuo Prompt Builder AI Tools
Half-Life Decay Calculator Science
Hanzi → Pinyin Converter (汉字拼音转换) Chinese Language & Script
Hanzi Stroke Count Lookup (汉字笔画查询) Chinese Language & Script
Hard Money Loan Calculator (Fix & Flip) Finance & Money
Hardy-Weinberg Calculator Science
HAS-BLED Bleeding Risk Calculator Medical · Clinical Formulas
Hash Generator Developer Tools
Hazen-Williams Pipe Flow Calculator Engineering
HDB Affordability Calculator (MSR · TDSR · LTV) Finance & Money
Headline Analyzer SEO & Marketing
Heart Rate Calculator Health & Fitness
Heart Rate Zones Calculator (Karvonen) Health & Fitness
Heat Transfer Calculator Science
HELOC Calculator Finance & Money
Henderson-Hasselbalch Buffer Calculator Science
Hiking Calorie Calculator Outdoors & Recreation
HK Dollar Cheque Words Converters & Units
HMAC Generator Crypto & Web3
Holland Code Career Test Personality Tests
Home Electricity Bill & Appliance Energy Calculator Sustainability & Environment
Home Equity Buildup Schedule Finance & Money
Hong Bao Amount Generator (红包金额) Chinese Culture & Almanac
Hong Kong 18 Districts Reference (香港 18 區) Converters & Units
Hong Kong HKID Format Validator (香港身份证) Converters & Units
Hong Kong MPF Calculator Finance & Money
Hong Kong Property Stamp Duty Calculator Finance & Money
Hong Kong Salaries Tax Calculator Finance & Money
Horsepower, Torque & Power-to-Weight Calculator Auto & Transport
House Direction Analyzer (房屋朝向) Chinese Culture & Almanac
House Hacking ROI Calculator Finance & Money
HSA Triple Tax Advantage Calculator Finance & Money
HSA vs FSA Calculator Finance & Money
HSK Vocabulary Lookup (HSK 词汇表) Chinese Language & Script
HTML Entity Encoder / Decoder Developer Tools
HTTP Status Code Reference Developer Tools
Hunyuan Image Prompt Builder AI Tools

I

I-Ching 64 Hexagrams (易经六十四卦) Chinese Culture & Almanac
IBAN Validator Finance & Money
Ideal Gas Law Calculator (PV = nRT) Science
Ideal Weight Calculator Health & Fitness
Image Compressor Image & File
Image EXIF Stripper Image & File
Image Format Converter Image & File
Image Prompt Style Mixer AI Tools
Image Resizer Image & File
Image to ASCII Art Image & File
Image to Base64 Image & File
Image-Gen Resolution Picker AI Tools
Image-to-Video Prompt Builder AI Tools
Impermanent Loss Calculator Crypto & Web3
Implied Volatility Calculator Finance & Money
Indonesian Name Generator Fun & Misc
Inflation Calculator Finance & Money
Insulation R-Value Calculator Home & Garden
Integral Calculator Mathematics
Interactive Periodic Table Science
International Chess Board Fun & Misc
Internet Personality Test Fun & Misc
Investment Returns Calculator Finance & Money
Invoice Generator Finance & Money
IP Lookup Developer Tools
IPv4 Subnet Calculator Developer Tools
IPv6 Subnet Calculator Cybersecurity Tools
IRA vs Roth IRA Calculator Finance & Money
Iron Condor Calculator Finance & Money
IRR Calculator Finance & Money

J

Japanese Name Generator Fun & Misc
Jet-Lag Recovery & Light Planner Food & Travel
Jimeng Image Prompt Builder AI Tools
Job Offer Comparison Calculator Career & Work
JSON / YAML / XML / CSV Converter Developer Tools
JSON Formatter & Validator Developer Tools
JSON Schema to Sample Data AI Tools
JSON to Code Types Generator Developer Tools
JWT Decoder Developer Tools

K

Kangxi Radical Lookup (214 部首查询) Chinese Language & Script
KEV Remediation Deadline Calculator Cybersecurity Tools
Keyboard Tester Fun & Misc
Keyword Density Checker SEO & Marketing
Kimi Long-Context Prompt Builder AI Tools
Kinetic Energy Calculator Science
Kling Prompt Builder AI Tools
Korean Name Generator Fun & Misc
Kua Number Calculator (Eight Mansions) Chinese Culture & Almanac

L

Laminate Flooring Calculator Home & Garden
Lean Body Mass Calculator Health & Fitness
Lease-to-Own (Rent-to-Own) Calculator Finance & Money
Leave Optimizer (SG / MY / HK) Career & Work
Life Path Number (Numerology) Fun & Misc
Light Triad Test Personality Tests
Lightning Distance Calculator Outdoors & Recreation
Limit Calculator Mathematics
Line Sorter Text Tools
Linear Equations Solver Mathematics
Linear Regression & Correlation Calculator Mathematics
LLM Cost Calculator AI Tools
LLM JSON Repair AI Tools
LLM Price Comparison AI Tools
llms.txt Generator AI Tools
Loan & EMI Calculator Finance & Money
Loan Amortization Schedule Generator Finance & Money
Loan Comparison Calculator Finance & Money
Logarithm Calculator Mathematics
Long Division Calculator Mathematics
Long-Term Care Insurance Calculator Finance & Money
Lorem Ipsum Generator Text Tools
Lottery Quick Pick Generator Fun & Misc
Love Compatibility Calculator Fun & Misc
LTV:CAC Ratio Calculator Finance & Money
Lucky Phone Number Picker (手机号选号) Chinese Culture & Almanac
Lumber Board-Foot Calculator Home & Garden
Lunar / Solar Date Converter Chinese Culture & Almanac

M

MAC Address Tool Developer Tools
Macros Calculator Health & Fitness
Mahjong Scoring HK Style (港式麻将番数计算) Chinese Culture & Almanac
Major Luck Cycle Calculator (大运排盘) Chinese Culture & Almanac
Malay Name Generator Fun & Misc
Malaysia MyKad Validator Converters & Units
Malaysia Postcode Lookup Converters & Units
Malaysia Road Tax (LKM) Calculator Auto & Transport
Malaysian & Singaporean Mandarin Converter Text Tools
Mandarin Tone Drill (普通话声调练习) Chinese Language & Script
Manglish & Singlish Translator Text Tools
Margin Requirement Calculator (Reg T + Maintenance) Finance & Money
Markdown Preview Developer Tools
Markdown Table Formatter AI Tools
Markdown Table Generator Developer Tools
Markdown to PDF Developer Tools
Markup vs Margin Calculator Finance & Money
Martian Text Converter (火星文) Fun & Misc
Matrix Calculator Mathematics
Max Heart Rate Calculator Health & Fitness
MCP Server Config Builder AI Tools
Mean Median Mode Calculator Mathematics
Meat Roasting Time & Temperature Calculator Cooking & Food
Medicare Cost Estimator Finance & Money
Meeting Cost Calculator Finance & Money
Melayu + Indonesia Family Relationship Tool Family & Heritage
Meta Description Length Checker SEO & Marketing
Meta Tag Generator SEO & Marketing
Metronome Fun & Misc
Microscope Magnification Calculator Science
Mid-Parental Height Calculator Health & Fitness
Midjourney Prompt Builder AI Tools
MLB FIP Calculator (Fielding Independent Pitching) Sports
Modulo Calculator Mathematics
Molar Mass Calculator Science
Molarity & Dilution Calculator (C1V1=C2V2) Science
Molarity Calculator Science
Mole Conversion Calculator Science
Moment of Inertia Calculator (Common Shapes) Engineering
Momentum Calculator Science
Monogram Maker Fun & Misc
Monthly LLM Spend Projector AI Tools
Mortgage Acceleration Calculator (Extra Payments) Finance & Money
Mortgage Affordability Calculator (How Much House?) Finance & Money
Mortgage Amortization Schedule Calculator Finance & Money
Mortgage Calculator Finance & Money
Mortgage Extra Payment Calculator Finance & Money
Mortgage Points Calculator (Rate Buy-Down) Finance & Money
Mortgage Recasting Calculator Finance & Money
Mortgage Refinance Calculator Finance & Money
Mortgage Stress Test Finance & Money
Moving House Date Selector (搬家吉日) Chinese Culture & Almanac

N

Naismith Hiking Time Calculator Outdoors & Recreation
Name Card Fun & Misc
Nernst Equation Calculator Science
Net Promoter Score (NPS) Calculator Finance & Money
Net Worth Calculator Finance & Money
Newton's Gravitational Force Calculator Science
Newton's Second Law Calculator Science
NFL Passer Rating Calculator Sports
NFT Royalty Calculator Crypto & Web3
NHL Save % + Corsi Calculator Sports
NPV Calculator Finance & Money
Nth Root Calculator Mathematics
Number Base Converter Developer Tools
Number to Hanzi Converter (数字转汉字) Chinese Language & Script
Number to Words Converter Mathematics

O

OG Preview SEO & Marketing
Ohm's Law Calculator Science
One-Rep Max Calculator Health & Fitness
One-Way ANOVA Calculator Mathematics
Option Greeks Calculator (Δ Γ Θ ν ρ) Finance & Money
Overtime Pay Calculator Career & Work

P

P/E Ratio Calculator (Price-to-Earnings) Finance & Money
Pain & Suffering Settlement Estimator Finance & Money
Paint Calculator Home & Garden
Palindrome Checker Text Tools
Passphrase Generator Cybersecurity Tools
Password Generator Developer Tools
Password Strength Tester Cybersecurity Tools
Pay Raise Calculator Career & Work
Payroll Cost Calculator (Employer-Side) Finance & Money
Payslip Decoder (Singapore, Malaysia, Indonesia) Finance & Money
PCB / MTD Calculator (Malaysia) Finance & Money
PDF Compressor Image & File
PDF Diff Image & File
PDF Form Filler Image & File
PDF Image Extractor Image & File
PDF Merger Image & File
PDF Metadata Cleaner Image & File
PDF Page Numberer Image & File
PDF Redactor Image & File
PDF Rotator Image & File
PDF Signature Checker Image & File
PDF Splitter Image & File
PDF Text Extractor Image & File
PDF to Image Image & File
PDF Watermark Image & File
PDF Word Counter Image & File
PEG Ratio Calculator (P/E ÷ Growth) Finance & Money
Pencari Kata Bahasa Melayu Text Tools
Percent Error Calculator Mathematics
Percentage Calculator Mathematics
Permutation & Combination Calculator Mathematics
Personal Loan Payoff Calculator Finance & Money
Personal Lucky Color & Direction (用神喜忌) Chinese Culture & Almanac
Pet Calorie Calculator (RER + MER) Pets & Animals
Pet Food Portion Calculator (Cups / Grams) Pets & Animals
Pet Ideal-Weight & Body-Condition Calculator Pets & Animals
Pet Insurance Premium Estimator Pets & Animals
Pet Water Intake Calculator Pets & Animals
pH Calculator Science
Phone Number Parser Developer Tools
Pinyin ↔ Zhuyin Converter (拼音注音互换) Chinese Language & Script
Pipe Flow Calculator (Darcy-Weisbach) Engineering
Pizza Dough Calculator Cooking & Food
Plain Text Diff Text Tools
PMI Calculator (Private Mortgage Insurance) Finance & Money
Polynomial Calculator Mathematics
Pomodoro Timer Fun & Misc
Pool Heater BTU Sizing Calculator Home & Garden
Pool Volume & Chemistry Calculator Home & Garden
Portfolio Rebalancing Calculator Finance & Money
Potential Energy Calculator Science
Price-to-Rent Ratio Calculator Finance & Money
Prime Number Checker Mathematics
Profit Margin Calculator Finance & Money
Project Time Estimator (PERT) Finance & Money
Prompt Cleaner & Normalizer AI Tools
Prompt Diff & Compare AI Tools
Prompt Framework Builder AI Tools
Prompt Template Filler AI Tools
Prompt Weight Editor AI Tools
Proportion Calculator Mathematics
PSLE AL Score Calculator Education & Students
PTO / Annual-Leave Accrual Calculator Career & Work
Pump Total Dynamic Head Calculator Engineering
Punnett Square Calculator Science
Puppy Adult-Weight Predictor Pets & Animals
Pythagorean Theorem Calculator Mathematics

Q

Qing Palace Gender Chart (Folklore) Family & Heritage
QR Code Generator Developer Tools
QTc Calculator (Bazett + Fridericia + Framingham) Medical · Clinical Formulas
Quadratic Equation Solver Mathematics
Quick (Sucheng) Input Code Lookup (速成) Text Tools
Qwen Prompt Builder AI Tools

R

Race Time Predictor Health & Fitness
Rainwater Harvesting & Tank Sizing Calculator Sustainability & Environment
Random Date Picker Fun & Misc
Random Name Generator Fun & Misc
Random Number Generator Fun & Misc
Random Picker Fun & Misc
Random Team Generator Fun & Misc
Random Word Generator Fun & Misc
Rare Chinese Character Reader Text Tools
Ratio Calculator Mathematics
Reaction Yield & Limiting Reagent Calculator Science
Reading Level Calculator Text Tools
Reading Time Calculator SEO & Marketing
Real Return Calculator Finance & Money
Rebar Weight Calculator Home & Garden
Recipe Scaler Cooking & Food
Recycling Impact Calculator Sustainability & Environment
Regex Cheat Sheet & Tester Developer Tools
Regex Tester & Debugger Developer Tools
Remote vs Office Cost Calculator Career & Work
Rent vs Buy Calculator Finance & Money
Rental Property Cash Flow Calculator Finance & Money
Rental Property ROI Calculator Finance & Money
Reorder PDF Pages Image & File
Resistor Color Code Calculator (4 + 5 + 6 band) Engineering
Restaurant Bill Splitter (Per-Item) Finance & Money
Retirement Calculator Finance & Money
Reynolds Number Calculator Engineering
Risk/Reward Ratio Calculator Finance & Money
RMB Number to Chinese Capitalised Words Chinese Language & Script
RMD Calculator Finance & Money
RMR / BMR Calculator (Mifflin-St Jeor) Health & Fitness
Road Trip Cost Calculator Finance & Money
ROAS / MER Calculator Finance & Money
Robots.txt Generator SEO & Marketing
ROI on Renovation Calculator Finance & Money
Roman Numeral Converter Fun & Misc
Roof Pitch Calculator Home & Garden
Roth vs Traditional Comparator Finance & Money
Rounding Calculator Mathematics
RSA Key Pair Generator Crypto & Web3
RSU Tax Withholding Estimator Finance & Money
Rule of 40 Calculator Finance & Money
Rule of 72 Calculator Finance & Money
Running Pace Calculator Health & Fitness

S

SaaS Magic Number Calculator Finance & Money
SaaS MRR / ARR / Churn Calculator Finance & Money
SaaS Quick Ratio Calculator Finance & Money
Safe Withdrawal Rate Calculator Finance & Money
Salary Calculator Finance & Money
Salary Hourly ↔ Annual Converter Finance & Money
Salary Negotiation Anchor Calculator Career & Work
Sample Size Calculator Mathematics
Sampling Parameters Cheat Sheet AI Tools
Sancai Wuge Name Analyzer (三才五格) Chinese Culture & Almanac
Savings Rate Calculator Finance & Money
SBA Loan Eligibility Calculator Finance & Money
Schema.org FAQ Markup Generator SEO & Marketing
Scientific Calculator Mathematics
Screenshot to PDF Image & File
Seedance Prompt Builder AI Tools
SEO Title Tag Length Checker SEO & Marketing
Sequence Calculator Mathematics
Severance Pay Calculator Career & Work
Shared DNA & Relationship Calculator Family & Heritage
Sharpe Ratio Calculator Finance & Money
Signature Maker Fun & Misc
Simplified ↔ Traditional Chinese Converter (简繁转换) Chinese Language & Script
Singapore & Malaysia Income Tax Calculator 2026 Finance & Money
Singapore COE, ARF & PARF Calculator Auto & Transport
Singapore NRIC / FIN Validator Converters & Units
Singapore Postcode Lookup Converters & Units
Singapore Stamp Duty Calculator (BSD · ABSD · SSD) Finance & Money
Sitemap Generator SEO & Marketing
Sleep Calculator Health & Fitness
Slug Generator SEO & Marketing
Small Business Valuation Calculator Finance & Money
Snell's Law Calculator Science
Social Security Claiming Age Calculator Finance & Money
Sod and Grass Seed Calculator Home & Garden
Solar Panel Output, Savings & Payback Calculator Sustainability & Environment
Speed Converter Converters & Units
Spring Festival Couplet Generator (春联生成器) Chinese Culture & Almanac
Sprint Velocity & Burndown Calculator Finance & Money
SST Calculator (Malaysia Sales & Service Tax) Finance & Money
Stable Diffusion Prompt Builder AI Tools
Stair Stringer Calculator Home & Garden
Standard Deviation Calculator Mathematics
Standard Error Calculator Mathematics
Stock Option / RSU Valuation Calculator Finance & Money
Stock Position Sizing Calculator Finance & Money
Stock Split Calculator Finance & Money
Stop Sequence Tester AI Tools
Stopping Distance Calculator Auto & Transport
Stopwatch Fun & Misc
Structured Prompt Builder AI Tools
Student Loan Payoff vs Invest Calculator Finance & Money
Subscription Pricing Tier Calculator Finance & Money
Sunrise, Sunset & Golden Hour Calculator Outdoors & Recreation
SUVAT Kinematics Calculator Science
SVG Placeholder Generator Image & File
Sweat Rate Calculator Health & Fitness
Swimming Pace Calculator Sports
System Prompt Builder AI Tools

T

T-Test Calculator Mathematics
Tai Sui (犯太岁) Checker Chinese Culture & Almanac
Taiwan 22 Counties Reference (台灣 22 縣市) Converters & Units
Taiwan Income Tax Calculator Finance & Money
Taiwan Labor & Health Insurance Calculator Finance & Money
Taiwan National ID Format Validator (台灣身分證) Converters & Units
Take-Home Salary Calculator (Indonesia) Finance & Money
Take-Home Salary Calculator (Malaysia) Finance & Money
Take-Home Salary Calculator (Singapore) Finance & Money
Tang Poetry Browser (唐诗三百首精选) Chinese Language & Script
Target GPA Planner Education & Students
Tax-Equivalent Yield Calculator Finance & Money
TDEE & Calorie Calculator Health & Fitness
Temperature & Top-p Explainer AI Tools
Term Life Insurance Calculator (ASEAN — CPF/EPF/SOCSO) Finance & Money
Term Life Insurance Needs Calculator (US — DIME + Human Life Value) Finance & Money
Tes Kepribadian Lima Faktor Personality Tests
Tes Minat Karier Holland Personality Tests
Test Score Grade Calculator (EZ Grader) Education & Students
Text Case Converter Text Tools
Text Chunker for RAG & Embeddings AI Tools
Text Reverser Text Tools
Text Statistics & Readability Text Tools
Text to Morse Code Text Tools
Thai Name Generator Fun & Misc
The Art of War Strategy Finder (谋略测评) Chinese Culture & Almanac
Tian Gan Di Zhi Converter (天干地支) Chinese Culture & Almanac
Tile Calculator Home & Garden
Time Card / Weekly Hours Calculator Finance & Money
Time Duration Calculator Converters & Units
Time Value of Money Calculator (TVM Solver) Finance & Money
Timezone Converter Converters & Units
Tip & Bill Splitter Finance & Money
Tip Calculator Finance & Money
Tire Size Calculator Auto & Transport
Token Counter AI Tools
Tokenization Visualizer AI Tools
Tokens ↔ Words ↔ Characters Converter AI Tools
Tongyi Wanxiang Prompt Builder AI Tools
Total Cost of Ownership Calculator (Car) Auto & Transport
TOTP / 2FA Code Generator Crypto & Web3
Tree Planting CO₂ Sequestration Calculator Sustainability & Environment
Triangle Calculator Mathematics
Triangle Solver Mathematics
Trigonometry Calculator Mathematics
Trinity Study Portfolio Success Calculator Finance & Money
True Airspeed (TAS) Calculator Outdoors & Recreation
True Shooting Percentage (TS%) Calculator Sports
Tuition Cost Calculator Education & Students
TWD Cheque Words (新台幣大寫) Converters & Units
Type Scale Calculator Developer Tools
Typing Speed Test Fun & Misc

U

Ujian Minat Kerjaya Holland Personality Tests
Ujian Personaliti Lima Faktor Personality Tests
Unit Converter Converters & Units
Unix Timestamp Converter Developer Tools
URL Encoder / Decoder Developer Tools
User Agent Parser Developer Tools
Username & Bio Generator Fun & Misc
UTM Builder SEO & Marketing
UUID / ULID Generator Developer Tools

V

Vacancy Rate Calculator Finance & Money
Vector Calculator Mathematics
Vesting Schedule Calculator (Cliff + Monthly) Finance & Money
Vidu Prompt Builder AI Tools
VO2 Max Calculator Health & Fitness
Voltage Drop Calculator Engineering
Volume & Surface Area Calculator Mathematics

W

WACC Calculator (Weighted Average Cost of Capital) Finance & Money
Waist-to-Height Ratio Calculator Health & Fitness
Wallpaper Calculator Home & Garden
Water Intake Calculator Health & Fitness
Watermark Maker Image & File
Wave Equation Calculator Science
WCAG Contrast Checker Developer Tools
WeChat Article Prompt Builder AI Tools
Wedding Date Selector (结婚吉日) Chinese Culture & Almanac
Week Number Calculator Converters & Units
Weighted Grade Calculator Education & Students
Wells Score Calculator (DVT + PE) Medical · Clinical Formulas
What to Do This Weekend Fun & Misc
Whitespace Remover & Text Cleaner Text Tools
Whole Life vs Term Insurance Comparison Finance & Money
WiFi QR Code Generator Developer Tools
Wind Chill & Heat Index Calculator Outdoors & Recreation
Wind Load Calculator (Simplified) Engineering
Wire Size Calculator (NEC Ampacity + Voltage Drop) Engineering
Wong Tai Sin Oracle (黃大仙靈籤) Chinese Culture & Almanac
Word Counter Text Tools
Word Unscrambler Text Tools
Word Unscrambler Bahasa Indonesia Text Tools
Work Hours & Timesheet Calculator Career & Work
Working Capital Calculator Finance & Money
Working Days Calculator Converters & Units
Workout Picker Fun & Misc
Wubi (86) Input Code Lookup (五筆) Text Tools

X

Xiangqi Interactive Board (中国象棋互动棋盘) Chinese Culture & Almanac
Xiaohongshu (RED) Content Prompt Builder AI Tools
Xiehouyu Dictionary (歇後語) Chinese Language & Script

Y

Your Life in Weeks Fun & Misc
Yuelao Love Oracle (月老靈籤) Chinese Culture & Almanac

Z

Z-Score Calculator Mathematics
Zhihu Answer Prompt Builder AI Tools
Zhougong Dream Dictionary (周公解夢) Chinese Culture & Almanac
Zhuyin / Bopomofo Converter (注音符号) Chinese Language & Script
Zi Wei Dou Shu Chart (Purple Star Astrology) Chinese Culture & Almanac
Zodiac Compatibility (Western) Fun & Misc
Zodiac Daily Horoscope (生肖运势) Chinese Culture & Almanac
Zodiac Sign Calculator Family & Heritage