How to use
- Set the size limit. Type the maximum size the form allows, or tap a preset such as 20 KB or 50 KB.
- (Optional) set a maximum width and height. Some forms also ask for pixel dimensions, for example 200 × 230 px for a photo. Leave these empty to keep the original proportions and let the tool decide.
- Add your images. Drop them on the box or click to choose. You can add several at once.
- Download. Each result shows the new file size and dimensions. Click the thumbnail to check the result at full size, then click Download to save the JPG.
How it works
The tool first tries to keep your image at its full size and looks for the highest JPEG quality that still fits under your limit. If the file is still too large at a reasonable quality, it gradually scales the image down and tries again. This keeps the result as sharp as possible for the size you need.
Everything happens inside your browser using the built-in canvas feature. Your photos are not sent to a server, which matters when you are handling ID photos, signatures or documents.
Tips for the best result
- Crop first. Removing empty background before compressing leaves more of the size budget for the part that matters.
- Very small limits need small images. A 20 KB file cannot hold a full-resolution phone photo. If the form lists pixel dimensions, enter them – the result will look better than a large image squeezed to low quality.
- Signatures: sign in dark ink on plain white paper and photograph it in good light. High contrast images compress much better.
- Transparent PNGs are placed on a white background, because JPG does not support transparency.
Frequently asked questions
Is 1 KB 1000 bytes or 1024 bytes?
Both definitions are in use, and forms rarely say which one they mean. This tool counts 1 KB as 1000 bytes, so a “50 KB” result is at most 50,000 bytes. That keeps you under the limit under either definition.
Why is the output always JPG?
JPG gives the smallest files for photos and is accepted by almost every upload form. If a form specifically requires PNG, this tool is not the right fit.
Are my images uploaded or stored?
No. Compression runs entirely on your device. Closing the page discards everything.
Does it remove photo metadata?
Yes. Re-encoding the image drops EXIF data such as camera details and GPS location, so the downloaded file does not carry that information.
Which image formats can I use?
JPG, PNG and WebP work in all modern browsers. Other formats, such as HEIC from iPhones, depend on your browser. If a file cannot be opened, convert it to JPG first or change your iPhone camera setting to “Most Compatible”.
Common sizes
Pages preset to common limits: