Compress a signature to 20 KB
Get a photo or scan of your signature under 20 KB for online application forms. It all runs 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
Photograph or scan your signature on white paper and drop the image in.
- 2
Graviton compresses it to 20 KB or less as a JPG.
- 3
Download it and upload it to your form.
Tips for a clean signature
Sign with a dark pen on plain white paper, photograph it in daylight without shadows, and crop close to the signature before compressing. Less empty paper means more detail fits in 20 KB.
Different limit on your form?
Many forms ask for 10–20 KB. Change the target size in the settings to match the exact limit on your form.
Frequently asked questions
Which format do forms accept?
Almost all accept JPG or JPEG, which is what Graviton produces here. Check your form in case it asks for something else.
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.
Can I do my photo too?
Yes. Use the exam photo compressor for photos, which aims for 50 KB.
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.