Image Tools
Six free tools for the jobs that come after conversion: fitting an image under a size limit, cropping, resizing, and removing, recolouring or blurring a background. All six run in your browser. The three background tools use an AI model that downloads to your device once and never sends your photo anywhere.
Last updated
Choose a tool
- Image compressorFit a JPG under 20, 50, 100 KB or any limit.
- Background removerCut out the subject as a transparent PNG.
- Change background colorPut the subject on white or any colour you pick.
- Blur backgroundKeep the subject sharp and soften what is behind it.
- Image cropperCrop freehand or to 1:1, 16:9 and 4:3.
- Image resizerScale down by percentage with the aspect ratio locked.
Which tool for which job
| You need to… | Use |
|---|---|
| Upload a photo to a form that says “maximum 50 KB” | Image compressor |
| Put a product or portrait on a plain white background | Change background color |
| Place a subject over something else in a design | Background remover |
| Make a busy background less distracting | Blur background |
| Make a square for a profile picture, or a 16:9 banner | Image cropper |
| Shrink an image that has far more pixels than you need | Image resizer |
How the background tools work
All three background tools use the same AI model, ISNet, to work out which pixels belong to the subject. It runs inside your browser, on your own processor, through WebAssembly. The model is 84 MB and comes from this site rather than a third-party server, so the first run on a device takes a while to download it; your browser then keeps a copy and later runs start straight away.
They process one image at a time. The model holds large working buffers while it runs, and two at once is enough to make a phone close the tab partway through, so the limit is enforced in the engine itself rather than only in the page. The results are best on a clear subject against a background that differs from it in colour or brightness. Fine hair against a busy background, glass and reflections are hard cases for any model of this kind, and are worth checking closely before you use the result.
Compress to a size, or resize?
They solve different problems, and people often reach for the wrong one. A form that limits the file size, in kilobytes, wants the compressor: it lowers the JPG quality step by step until the file fits, and only reduces the dimensions if quality alone cannot get there. A form or a layout that specifies dimensions, in pixels, wants the resizer or the cropper. When a form asks for both, resize or crop first, then compress.
What these tools do not do yet
Better to know before you upload. The resizer works in percentages, from 10 to 100, so it cannot yet produce an exact size such as 1080 by 1080 pixels; crop to the right shape first and then scale, or use the compressor if the real limit is the file size. The background tools take one photo at a time, so a folder of product shots means a run per image, though only the first run waits for the model to download. Photos straight from an iPhone in HEIC format are not accepted yet; set the camera to “Most Compatible” or export as JPG first. And nothing here enlarges an image beyond its original size, because inventing detail that was never captured is a different and much less honest kind of tool.
Limits and privacy
The compressor, cropper and resizer take up to 5 images at a time; the background tools take one. Every tool here does its work on your device, which is easy to verify with your browser’s developer tools, and this guide walks through the check. Cropped and resized images are saved as lossless PNG, so editing them does not cost quality; the compressor saves JPG, because that is what size-limited upload forms expect.