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upscale.tools icon

upscale.tools

upscale.tools is a free AI image upscaler that runs entirely in the browser. It enlarges images 4x with Real-ESRGAN (realesr-general-x4v3) through ONNX Runtime Web on WebGPU, with a WebAssembly fallback, so the image is never uploaded: there is no upload endpoint on the site...

Before/after slider on a 4x result, processed in the browser (320x240 to 1280x960, nothing uploaded)

Cost / License

  • Free
  • Proprietary

Application type

Platforms

  • Online
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Features

Properties

  1.  Privacy focused
  2.  AI-Powered

Features

  1.  Hardware Accelerated
  2.  No registration required
  3.  Works Offline
  4.  Dark Mode
  5.  Ad-free
  6.  Non Destructive Editing
  7.  Image Upscaling
  8.  No Watermark

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upscale.tools information

upscale.tools was added to AlternativeTo by Zack-6521 on and this page was last updated .
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What is upscale.tools?

upscale.tools is a free AI image upscaler that runs entirely in the browser. It enlarges images 4x with Real-ESRGAN (realesr-general-x4v3) through ONNX Runtime Web on WebGPU, with a WebAssembly fallback, so the image is never uploaded: there is no upload endpoint on the site, the network tab stays empty, and the tool keeps working with Wi-Fi turned off once the page is loaded. No account, no credits, no daily quota, no watermark. Output is a lossless PNG at 4x the original width and height (2x and JPEG/WebP at export). The 5 MB model is cached after the first visit and the app works offline. Accepts PNG, JPEG, WebP, GIF, BMP, AVIF, HEIC and TIFF. Available in English, French, Spanish, German, Portuguese, Polish, Indonesian, Turkish, Arabic and Hindi.