Free tool
Compress an image to a specific size
An application form says “maximum 30 KB” and your photo is 3 MB? Type the limit, choose the image, and get the clearest JPG that fits. It all happens in your browser.
Other sizes: Compress image to 20 KB · Compress image to 50 KB · Compress image to 100 KB · Compress image to 200 KB · Resize signature to 10 KB · Resize signature to 50 KB · Resize signature to 20 KB · PDF to 100 KB
Need other people to sign?
PactPen sends your PDF to each signer by email, records their consent, time and IP address, and gives you the signed PDF with a certificate of completion. Free for 5 documents a month.
Try PactPen freeHow it works
- Type the maximum size the form allows, such as 30 KB.
- If the form also gives a width and height in pixels, enter them under Exact size.
- Choose your image, check the preview, and download the JPG.
Questions
Is my photo uploaded?
No. The image is resized and compressed inside your browser and never leaves your device, which matters for ID photos and signatures.
How does it keep the photo clear?
It first lowers the JPEG quality only as far as needed. If that is not enough, it makes the image a little smaller instead of compressing harder, because a smaller sharp photo looks better than a blocky full-size one.
The form also gives a size in pixels. Can I set that?
Yes. Enter the width and height under Exact size. The image is cropped from the centre to that shape rather than stretched, so a face or signature is never squashed.
Is 1 KB 1,000 or 1,024 bytes here?
We aim for 1,000. Forms disagree on which they mean, and a file under the 1,000-byte figure passes both kinds of check.
How do I know which size my form wants?
The form’s instructions state it, usually as a maximum in KB and sometimes as width and height in pixels. Limits differ from one form to the next, so check yours rather than relying on a general rule.