Real-ESRGAN at 2× and 4×
Two dedicated models, one per scale, rather than one model run twice. Pick 2× for a quick lift on a decent photo and 4× when a thumbnail has to become a poster.
AI image upscaler — 2× and 4× in your browser
Make a small or soft photo bigger and sharper with Real-ESRGAN. You see the output size before you start, compare before and after, then download. Free, no signup, no daily cap.
Drop an image to upscale
JPG, PNG, WebP, AVIF, HEIC, GIF, BMP, TIFF · one image · 50 MB max
FreeInstantNo signup
Upscaling that adds detail instead of blur
Stretch a 600-pixel photo to 2,400 pixels in a normal editor and you get a bigger, blurrier copy of the same picture. The software invents each new pixel by averaging its neighbours, so edges go soft, text smears and JPEG blocks grow with the image.
This image upscaler runs Real-ESRGAN, a neural network trained on millions of low- and high-resolution image pairs. It has learned what sharp edges, hair, fabric and brickwork look like up close, so it rebuilds that texture as it enlarges and cleans up compression damage on the way. The model runs on your own device: your graphics card through WebGPU when the browser supports it, your processor through WebAssembly when it doesn't.
One honest note before you start. The model predicts detail; it does not recover it. Faces, signs and fine print can come out crisp but slightly different from the real scene. That is fine for a print, a product listing or a header image, and wrong for evidence, scanned documents or anything that has to be exact.
Features
Output size shown up front
Each scale option shows the exact pixel size you will get before you press a button. Very large photos are capped to fit browser memory, and the cap is shown in plain numbers, never applied silently.
Transparency and HEIC handled
Transparent PNG and WebP files keep their alpha channel at the new size, so cut-outs stay cut out. iPhone HEIC photos open directly in any modern browser, with no separate conversion step.
When upscaling is the right fix
An old photo from a small camera
Early digital cameras and phone scans often top out at 640 or 1,024 pixels. A 4× pass turns them into something you can frame, share full screen or print as a gift.
Product shots for a marketplace
Etsy, eBay and Amazon reward large, crisp photos that support zoom. When a supplier image arrives too small, upscale it instead of reshooting the product.
A logo you only have as a small PNG
The transparent background survives the trip, so a 300-pixel logo pulled from an old website can become a 1,200-pixel one for a slide deck, a banner or a T-shirt mock-up.
Printing bigger than the file allows
A 10-inch print at 300 DPI needs 3,000 pixels on its long side. Upscale first so the printer has real detail to work with, then set the exact size in the Image Resizer.
Social posts and blog headers
A tight crop of a photo is often too small for a 1,200-pixel header or a full-width post. Upscale the crop so it stays sharp on high-density phone and laptop screens.
Illustrations and game art
Real-ESRGAN handles drawn outlines and flat colour well, so artwork, sprites and screenshots enlarge with clean edges instead of a soft halo.
What you get with this upscaler
- No daily limit, no credits, no account to create
- Never hands back an image smaller than the one you gave it
- Works offline once the model is saved in your browser
- Keeps your original format by default, or switch to PNG, JPG or WebP
How to upscale an image in three steps
Drop your image
Any JPG, PNG, WebP, AVIF, HEIC, GIF, BMP or TIFF up to 50 MB. It opens straight in the editor with its current size shown.
Pick 2× or 4×
Check the output size listed under each option, then press Upscale. The first run downloads the AI model once; after that it is saved in your browser and starts in seconds.
Compare and download
Drag the slider across the result to check edges and text against the original. Keep the original format or switch to PNG, JPG or WebP, then save.
Tips for the best upscale
- Tip 1:
Start from the largest copy you have. The model adds detail, but it does its best work with more real pixels to read.
- Tip 2:
Upscale before you compress. Compressing first bakes in artifacts that the model then enlarges along with everything else.
- Tip 3:
On a large photo, 4× can finish faster than 2×. Both are capped to the same output size, and 4× reaches it from a smaller input.
- Tip 4:
Keep PNG for logos and graphics with transparency. Choose JPG or WebP for photos so the file size stays sensible.
- Tip 5:
Need an exact size like 3000 × 2000? Upscale first, then set the final pixels with the Image Resizer.
AnyResizer vs other ways to upscale
| What you compare | AnyResizer | Typical online upscaler | Desktop app |
|---|---|---|---|
| Price | Free, no daily limit | Daily cap, credits or trial | One-time or yearly licence |
| Account | None | Often required | Licence key |
| Where it runs | Your device | Their servers | Your device |
| Upload wait | None | Upload, queue, download | None |
| Output size known before you run | Yes | Usually not | Yes |
| Speed on a large photo | Depends on your device | Fast once uploaded | Fast on a good GPU |
AI image upscaler — frequently asked
Got a photo that is too small?
Drop it in, pick 2× or 4×, and compare the sharper version side by side in a minute or two.