Upscayl
Free, open-source AI image upscaler — runs fully on your device, zero cloud, zero cost.
Overview
Upscayl is a free and open-source desktop application that uses AI to enlarge and enhance low-resolution images without sending any data to the cloud. Built on Real-ESRGAN neural network models and accelerated by the Vulkan GPU API, it supports 2x, 4x, and up to 16x upscaling through a double-pass mode, with six built-in AI model presets covering photos, illustrations, anime art, and more. It runs on Windows 10+, macOS 12+, and Linux — no account, no watermarks, no usage caps.
Launched in 2022 by independent open-source developers Nayam Amarshe and TGS963, Upscayl has accumulated over 46,000 GitHub stars, making it one of the most widely adopted free AI image tools in existence. A separate Upscayl Cloud service was later introduced for users who lack a compatible GPU, offering credit-based processing accessible from any device. The desktop app remains the flagship product: fully offline, privacy-safe, and genuinely comparable to mid-tier commercial upscalers for clean photos and line art.
Pricing
Pricing shown for reference only. These figures reflect RECATOOLS research as of 11 Jul 2026 and may be out of date or incomplete. This is not financial or purchasing advice — always confirm the current price on the provider’s official website before making any decision.
- Unlimited upscaling on your own GPU
- No watermarks, no account needed
- Windows, macOS and Linux
- 300 credits/month with rollover
- Up to 256MP upscaling
- 6-month storage + priority support
- Up to 512MP upscaling
- Custom credit volume
- Priority email/chat support
Use cases
What you can produce with Upscayl
- Up to 16x resolution upscale of any JPEG, PNG, BMP, TIFF, or WebP image
- Batch-processed folder of enhanced images with selectable AI model
- Double-pass 'Double Upscayl' output for severely compressed source files
- Before/after visual comparison using the built-in lens viewer
- Local upscaling output with zero watermarks, no account, and no data leaving the device
- Access to the bundled AI models (Upscayl Standard, Upscayl Lite, High Fidelity, Remacri, Ultramix Balanced, UltraSharp, and Digital Art), plus support for custom NCNN models
ASEAN Perspective
Upscayl in Southeast Asia
Upscayl is well-suited for ASEAN creators and small businesses that need professional-quality image enlargement without the USD subscription costs of tools like Topaz or Magnific. Version 2.15 added Indonesian and Vietnamese language support, reflecting a community acknowledgement of Southeast Asian users. The fully offline architecture is a practical fit for markets where cloud latency or data-privacy concerns are factors. No local entity, ASEAN partnerships, or region-specific support exist — but the tool works identically worldwide and the one-time download model removes currency and payment-method friction.
Upscayl delivers remarkable value as the de facto standard for free, private AI image upscaling. The desktop app is genuinely capable for photos, illustrations, and AI-generated art — and the zero-cost, zero-cloud model sets it apart from every commercial rival. Multiple AI model presets, batch processing, and double-pass upscaling give it more flexibility than most users expect from a free tool. Version 2.15 added multilingual support (including Indonesian and Vietnamese) and a polished new interface, signalling active development.
The caveats are real: output quality noticeably lags behind Topaz Gigapixel AI or Magnific AI on complex textures and face restoration, and performance is tightly coupled to having a Vulkan-compatible dedicated GPU with adequate VRAM. Users on integrated graphics or older hardware will face very slow processing or outright failures. There is no public developer API — the ncnn CLI exists but is not documented for third-party integration. For teams needing professional-grade restoration or creative hallucination of detail, commercial alternatives remain superior. But for individuals, indie creators, and privacy-sensitive workflows, Upscayl is the obvious first tool to try.
What people say
46,800 GitHub stars and counting — that's the number to check if you're wondering whether a free upscaler with no login and no watermark can actually compete with paid software. Upscayl runs Real-ESRGAN models locally through Vulkan, hitting up to 16x with a double-pass mode, and six built-in presets cover photos, anime art, and illustration separately rather than forcing one generic model on everything. The 2.15 release added a High Fidelity model plus interface translations, including Vietnamese and Indonesian.
Photos and clean illustrations upscale well; faces and fine textures still show artifacts that Topaz Gigapixel or Magnific handle more gracefully, and that gap is the main reason Upscayl reads as a strong free tool rather than a professional replacement. Everything needs a Vulkan-compatible GPU — integrated graphics owners will wait a long time or hit outright failures. There's no documented API, just an undocumented ncnn CLI, so it stays a consumer app rather than a pipeline component.
For anyone who doesn't want to hand a childhood photo or a client asset to a cloud service, Upscayl remains the default recommendation among free upscalers. An optional credit-based Upscayl Cloud tier exists for people without a compatible GPU — plans start around $10/month for 100 credits — but the desktop app, free forever per the developers, is the reason nearly 47,000 people have starred the repo.
Summary of public user & expert reviews, compiled by RECATOOLS.
Notable facts
- Upscayl has over 46,000 GitHub stars — more than many well-funded commercial AI products.
- The app was built with a Linux-first philosophy before expanding to macOS and Windows.
- Version 2.15 shipped on Christmas Day 2024, adding Indonesian and Vietnamese UI languages.
- The founder's GitHub location is listed as '127.0.0.1' — the localhost loopback address — a classic developer in-joke.
Frequently asked questions
About this listing
This entry was compiled from publicly available data including Upscayl's official website, press releases, documentation, and reputable third-party publications. RECATOOLS is not affiliated with Upscayl unless explicitly stated.
Third-party AI tools update their pricing, features, availability, and policies frequently. Information here may be outdated by the time you read this — we make reasonable efforts to keep listings current, but cannot guarantee absolute accuracy.
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