Upscale images with AI
Enlarge photos 2× or 4× with Real-ESRGAN, an AI model that rebuilds sharp detail instead of just stretching pixels. It runs in your browser, in seconds with WebGPU, for photos up to 4 megapixels.
Process locally
Files stay in this browser session. Closing or clearing releases them.
Choose files
JPG, PNG, WebP, BMP, TIFF, up to 5
Drop files here, or
Adjust settings
Optional: Enlarge
Run
Processes in this browser; cancel at any time
About this tool
Enlarge JPG, PNG, WebP, BMP and TIFF photos 2× or 4× with Real-ESRGAN, an AI model that sharpens edges and removes JPEG blockiness and some noise instead of just stretching the pixels: for example to print a small photo larger, improve an old picture from a phone or a website, or get a bigger image for a shop listing. The photos are processed in your browser and never uploaded.
The model, 4.9 MB, downloads the first time together with the ONNX Runtime engine that runs it, and the browser then keeps both. With WebGPU, which current Chrome and Edge offer, a photo takes seconds; otherwise the processor does the work, which is much slower: about a minute per megapixel of the original on a fast desktop and several minutes on a laptop. Up to 5 photos of up to 25 MB and 4 megapixels each, 80 MB in total, go in one run.
How to use it
- Choose or drop up to 5 JPG, PNG, WebP, BMP or TIFF photos of up to 4 megapixels each.
- Pick how much to “Enlarge”: “2× (twice as wide and tall)”, the default, or “4×”.
- Select Run. The first run downloads the model; later runs start right away.
- Check the results in the preview, then download them one by one or all together as a ZIP. Each keeps its format and file name, transparent areas stay transparent, and JPG and WebP are saved at quality 0.92.
Formats and limits
- Input
- JPG, PNG, WebP, BMP, TIFF, up to 5 files
- Output
- Same format as the input
- Size limit
- 25 MB per file, 80 MB in total
- Image size limit
- 4 megapixels per image
- Settings
- Enlarge (2×, 4×)
- Privacy
- Files stay in the current browser session. No file bytes are uploaded.
- Price
- Free, no sign-up
Common questions
Are my photos uploaded?
No. Only the model is downloaded from this site; the photos are enlarged in your browser and stay on your device.
How long does it take?
With WebGPU, a photo takes a few seconds. Without it, the processor does the work: about a minute per megapixel of the original on a fast desktop, several minutes on a laptop. The network always enlarges 4 times and 2× is that result scaled down by half, so 2× takes as long as 4×. A run may take at most 30 minutes, not counting the first download, so on a slow computer enlarge one or two photos at a time.
How large can the photos be?
The original may have up to 4 megapixels, such as 2000 × 2000 or 2560 × 1440, and the result up to 36 megapixels. So 4× takes photos of up to 2.25 megapixels, and a 1920 × 1080 picture becomes 7680 × 4320; photos between 2.25 and 4 megapixels can be enlarged 2×. Make larger photos smaller first, for example with “Resize images”.
Can it fix a blurry photo?
Only in part. It makes edges sharper and removes JPEG blockiness and some noise, but it cannot recover detail that was never captured: it may invent plausible texture instead, and faces and small text can look odd. It works best on photos; illustrations work too.
Which model is it, and may I use the results commercially?
Real-ESRGAN’s general model, realesr-general-x4v3, blended half and half with its weak-denoise variant, as Real-ESRGAN’s own script does by default. It is released under the BSD-3-Clause licence, which allows commercial use. Its licence and source are listed in this site’s third-party notices.
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