Free Image Upscaler
Enlarge and sharpen images with AI — free, and without uploading a thing.
Open the tool →Free · No account · No upload · Open source
100% in your browser
Private — no upload
No watermark
Free & open source
How it works
- Add the image you want to enlarge.
- Pick 2x or 4x and run the Upscale node. A local super-resolution model (Swin2SR) reconstructs detail.
- Download the higher-resolution result.
Why Nano Editor
- Private by design. The AI runs on your device with WebGPU — your images never leave your computer.
- Actually free. No account, no subscription, no watermark, no per-image cost.
- Part of a full studio. This tool is one node in a visual, node-based image editor — chain it with background removal, upscaling, generation and more.
- Open source. MIT-licensed on GitHub.
FAQ
How big can I upscale?
Choose 2x or 4x. The free local engine runs on your GPU via WebGPU; a cloud engine is also available with your own key.
Are my images uploaded?
No. The local upscaler runs on your device — nothing is sent to a server.
Is it free?
The local 2x/4x upscaler is completely free with no watermark.