Overlap-aware tiles
Neighbouring tiles share edge context so the reconstructed image does not look like a grid.
AI Tool
AI Image Upscaler
Increase image resolution 2× or 4× using Swin2SR super-resolution AI. All processing happens locally in your browser — your images are never uploaded anywhere.
100% browser-basedNo upload requiredFree to useWorks offline
Watch the workflow
Swin2SR super-resolution AI — runs entirely in your browser
How it works
- Drop any JPG, PNG, WebP, or AVIF image
- 2× — AI super-resolution using Swin2SR (~47 MB model, downloads once and caches)
- 4×— enable Real-ESRGAN for a true single-pass ×4 AI model (~66 MB, opt-in, cached); otherwise a two-pass Swin2SR cascade, which also runs automatically if Real-ESRGAN can't load on your device
- Large images are split into tiles processed sequentially — real-time ETA shown
- Output is always lossless PNG to preserve every detail
Common use cases
Print enlargement
Scale small digital files to print-ready resolution for posters, banners, and canvas prints.
Product photography
Enhance low-resolution product images to meet e-commerce platform requirements.
Old photo restoration
Bring clarity and detail back to scanned or low-resolution vintage photographs.
Social media content
Upscale cropped or compressed images to maintain quality at full display size.
Game asset upscaling
Improve texture resolution for retro games or indie projects without manual redrawing.
Thumbnail quality
Enlarge YouTube or blog thumbnails while keeping them sharp for all screen sizes.
Frequently asked questions
Is my image uploaded to a server?
No. The AI models download once to your browser (from a public CDN) and all processing happens locally. Your image never leaves your device.
What's the difference between 2× and 4×?
2× doubles width and height using the Swin2SR AI model. For 4× you can enable Real-ESRGAN — a true single-pass ×4 model that is noticeably crisper (one-time ~66 MB download, cached in your browser). If you keep the standard option, 4× uses a two-pass Swin2SR cascade instead, which also runs automatically as a fallback whenever Real-ESRGAN can't load.
What formats can I export?
Always lossless PNG, which preserves every detail the upscaler adds. You can convert to WebP or JPEG using the Format Converter tool after.
Will it work on large images?
Yes. Large images are split into overlapping tiles, each processed sequentially. You'll see a real-time progress estimate during processing.
Want to upscale a video?
2× and 4× Lanczos upscaling for MP4 and WebM clips — now live.
Related tools
Resolution strategy
Large images are rebuilt tile by tile
Tiling keeps memory predictable while overlap blending avoids visible seams. Choose a fast interpolation pass or model-powered detail reconstruction based on the source.
2× / 4×
Output scale
Source-sensitive choice
Logos and already-sharp art often suit Lanczos; small photos benefit more from super-resolution.
Honest dimensions
The result reports the real pixel size and opens directly in the Image Editor.
Know before you process: Upscaling cannot recover text or facial detail that is completely absent from the source; inspect at 100% before delivery.
Ready to try it?
Free, private, no signup.
Upscale an image →