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AI Image Upscaler

Upscale an image 2x or 4x directly in your browser with AllPic. The Real-ESRGAN model runs on your device with WebGPU or WebAssembly, so photos are never uploaded to a server, and there is no sign-up or watermark.

Browser local Local AI Batch

Choose an image to start

Files never leave your browser — all processing happens locally

The first run downloads and caches the local model required by this tool.

Supported formats

JPGPNGWebP

Browser local

Supported formats

Input: JPG · PNG · WebP

Output: PNG · JPG · WebP

Local processing

Selected files are handled inside your browser session. Large images and batch work depend on browser memory and device performance.

Limits

Performance depends on image size, batch count, browser support, model loading, and device memory.

Decision guide

Know what the result can and cannot do

AI upscaling predicts plausible high-resolution detail. It can improve perceived sharpness, but it cannot prove what was present in the original and should not be used as forensic evidence.

Best for

  • Small web images and old sharing copies
  • Illustrations and screenshots that need a larger canvas
  • Preparing a source for a moderate print or crop

Watch for

  • Faces and text can gain invented detail
  • 4x output uses much more memory than 2x
  • Already sharp large images may gain little

Before you share

  • Compare 2x before choosing 4x
  • Inspect faces, lettering, and repeated patterns
  • Label enhanced images when accuracy matters

Try this scenario

Separate plausible detail from recovered fact

Upscaling can improve perceived sharpness and size, but generated detail is not evidence that the original contained that detail.
Try it with
Compare 2x and 4x output for a small image containing a face, lettering, and repeated texture.
Check before sharing
  • Inspect faces and text for invented or distorted detail
  • Choose the smallest useful scale and keep the original beside the result
Last updated
August 1, 2026

Steps

How this tool works

  1. Step 1

    Choose or drop an image.

  2. Step 2

    Pick 2x or 4x upscaling.

  3. Step 3

    Run the AI locally in your browser.

  4. Step 4

    Preview the result and download.

FAQ

Useful limits and answers

Is my photo uploaded to a server?

No. The AI model runs inside your browser with WebGPU or WebAssembly. The image never leaves your device.

Which upscale factors are supported?

2x and 4x. A 1000x800 photo becomes 2000x1600 or 4000x3200 with reconstructed detail instead of blurry stretching.

Is the AI upscaler free?

Yes. The tool is free, with no sign-up, no watermark, and no usage limits beyond what your device can handle.

What happens on the first run?

The browser prepares a small AI model (about 5 MB) once and caches it locally. Later runs start instantly and also work offline.

How large can the input image be?

The tool automatically keeps the output within a safe browser memory budget and tells you if the input was reduced first.

Does it work for anime and illustrations?

Yes. The general Real-ESRGAN model handles photos, product shots, screenshots, and illustrations well.

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AllPic for iPhone

AllPic for iPhone is now available!

Get richer photo workflows with native performance, offline editing, and seamless sync.

Download on the App Store