Compress an image to 20 KB
Get any photo under 20 KB without guessing at quality settings. Graviton finds the sharpest version that fits, on your device.
Drop your images here
JPG, PNG, WebP, AVIF, HEIC and GIF, up to 100 MB each
How it works
Compress in three steps
- 1
Drop your image in. JPG, PNG, WebP, AVIF and iPhone HEIC all work.
- 2
Graviton searches for the highest quality that fits under 20 KB, keeping the original width and height.
- 3
Download a JPG that is ready to upload.
Who needs images under 20 KB?
Exam and job application portals often ask for a signature between 10 KB and 20 KB, and some ask for a photo of 20 KB or less. Always check the exact limit on your form.
How the exact-size search works
Instead of one fixed quality, Graviton encodes your image several times and keeps the best one under 20 KB. "Shrink dimensions if needed" is off by default, so the width and height stay the same and only the quality goes down. If that needs very heavy compression, Graviton offers "Shrink dimensions to fit": it reduces the dimensions a little at a time, which looks better than heavy compression artifacts.
Frequently asked questions
Can I get a photo this small without it looking bad?
20 KB is enough for a sharp passport-style photo at around 400–600 pixels wide. For a larger photo, turn on "Shrink dimensions if needed" so it is scaled down to fit, which keeps faces clear.
Will the file be exactly 20 KB?
It will be 20 KB or slightly less. Sizes are counted in kilobytes of 1,000 bytes, so the file also passes forms that count 1,024 bytes per kilobyte.
Are my images uploaded?
No. Graviton converts and compresses inside your browser, so your images never leave your device. Nothing is sent while you compress. When you download, the browser sends only a one-way fingerprint of the image, so the download can be counted and approved. Graviton stores none of it.
Is it free?
Yes. Compressing and converting are free and unlimited, with no account needed. Downloading needs a free account, which includes 3 downloads a day with every format and setting. Pro removes the daily limit.