All AI

Image Upscaler

Enlarge an image up to 4x with sharper detail, right in your browser.

image-upscaler.local

Drop an image here

PNG, JPG, or WebP, or paste from clipboard

Choose a file

Drop in an image and an AI model enlarges it 4x with sharper detail than a plain resize. The model runs on your own device.

Your image stays on your device. It is never uploaded or stored anywhere.

How to use it

  1. Drop in an image, paste it, or choose a file.
  2. Pick 2x or 4x and wait for the model to load once, then upscale.
  3. Download the enlarged PNG.

About this tool

The image upscaler runs a small Real-ESRGAN super-resolution model (realesr-general-x4v3) in your browser to enlarge a picture with cleaner edges and reconstructed detail, well beyond a plain resize. The model downloads once on first use, then runs offline. It works best on small to moderately sized images. To stay within browser memory, larger inputs are scaled down to 1024px on the long edge before upscaling, so a 4x result is up to about 4096px. AI upscaling invents plausible detail and is not a substitute for a true high resolution original, and it is weaker on heavy compression artifacts and on text.

Examples

Input480px product thumbnail
OutputAbout 1920px at 4x, sharper edges
Input300px avatar
Output1200px at 4x for a crisp profile picture

Common uses

  • Enlarge a small image without it going blurry
  • Sharpen a low resolution thumbnail
  • Upscale an avatar or logo for a bigger display
  • Recover detail in a downscaled photo

FAQ

Does my image get uploaded to upscale it?
No. The AI model runs in your browser on your own device. The image is never uploaded.
Why is the first run slower?
The model and its runtime download once on first use, then they are cached for instant, offline runs after that.
Why is there a size limit?
Upscaling is memory heavy. To keep memory in check, large inputs are scaled down to 1024px on the long edge before the 4x enlargement, giving up to about a 4096px result.

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Embed this tool

Paste this snippet to put the tool on your own site. It runs entirely in the visitor's browser, the same as it does here.

<iframe src="https://tooldok.com/embed/image-upscaler/" title="Image Upscaler by Tooldok" width="100%" height="720" style="border:1px solid #16130d;border-radius:16px;max-width:720px" loading="lazy"></iframe> <p style="font:13px sans-serif"><a href="https://tooldok.com/tools/image-upscaler/" target="_blank" rel="noopener">Image Upscaler</a> by <a href="https://tooldok.com/" target="_blank" rel="noopener">Tooldok</a></p>