Many forms reject files above 20 KB. Common cases are exam signatures and older government portals. Choose your image and this tool finds the highest JPEG quality that keeps it under 20 KB. If quality would drop too far, it reduces the dimensions slightly instead, so the result still looks clean.
At 20 KB there is not much room, so a large photo will be scaled down. For exam forms that need exact pixel dimensions too, use the exam photo resizer.
How to use it
- Choose your image (JPG, PNG, WebP or HEIC from iPhone).
- The tool compresses it to under 20 KB straight away. Change the target if your form needs a different limit.
- Download the result. The file size is shown before you download.
Questions
How do I reduce a photo to 20 KB on my phone?
Open this page on your phone, tap "Choose images", pick the photo and download the result. It works in Chrome and Safari without an app.
Will the image be exactly 20 KB?
It will be just under 20 KB, which is what upload forms check for. If a form also needs a minimum size, use the exam photo resizer, which can pad the file to a minimum.
What format is the result?
JPG by default (or the original format for WebP/PNG). Change "Output format" if you need something else.
Are my files uploaded to a server?
No. The tool runs entirely in your browser using JavaScript, so your files never leave your device. You can even disconnect from the internet after the page loads and it keeps working.