UnderByte

Tiny photo upload limits

Compress Photo to 20KB Online

Compress a photo to 20KB online for exam forms, application portals, and tiny upload limits. Runs in your browser.

Compress a photo to 20 KB Pricing

Precise

Hit the exact limit your upload portal expects.

Private

Your file stays in your browser instead of being uploaded to a server.

Fast

Open the tool, hit the target, and download the result in one flow.

First file free. More files today are $3.99. No upload, no guessing.

For portals that reject anything over 20 KB

A 20 KB photo limit is usually not a design preference. It is a hard upload rule on an older form, exam portal, or legacy site.

UnderByte starts with the number the portal cares about and searches for a result under that cap. Tight cropping before compression usually helps the most because blank background still costs bytes.

Questions people usually have

Can a photo still look good at 20 KB?

Sometimes, if it is tightly cropped and the required dimensions are small. A large uncropped photo may need both resizing and compression to fit.

Does the photo upload to UnderByte?

No. The compression runs in your browser, so the photo stays on your device while the app works.

When this page helps

Use this page when you need Compress Photo to 20KB Online for a form, portal, or email attachment. UnderByte lets you aim at the limit directly instead of guessing export settings over and over.

For photos, signatures, and profile pictures, crop tightly before compressing so you are not wasting bytes on blank space. JPG usually reaches strict limits faster than PNG.

Related exact-size tools

Compress Photo to 100KB Online

Compress a photo to 100KB online for profile pictures, application forms, and document portals without uploading it to a server.