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Compress image to 20 KB

Pick a photo and get a JPG under 20 KB. The tool keeps the best quality that fits.

Works on your device. Nothing is uploaded.

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Where 20 KB is asked for

20 KB is the most common upper limit for signatures (often written as "10 to 20 KB") and a common lower limit for photographs ("20 to 50 KB"). A passport-style photo of about 200 × 230 pixels lands at 15 to 30 KB at good quality, so this size is easy to reach without visible damage. If the form asks for a minimum of 20 KB and your clean photo is smaller, the tool tops it up so it passes the minimum check.

How to compress a photo to 20 KB

  1. Tap Choose a photo and pick it from your gallery or files.
  2. If the form gives a pixel size (for example 200 × 230), type it in Width and Height; otherwise leave them empty.
  3. Keep Maximum KB at 20. If the form also gives a minimum, type it in Minimum KB.
  4. Tap Make my file and download the JPG.

How the tool reaches the size

JPEG files get smaller in two ways: fewer pixels, or lower quality. Lower quality first blurs fine detail and then shows blocky patches, so the tool tries quality first only down to about 55%, and if the file is still above 20 KB it reduces the pixel size step by step. When you fix the width and height, only the quality can change, and the tool searches for the highest quality that stays under 20 KB.

The limit is counted safely: "20 KB" can mean 20,000 bytes or 20,480 bytes depending on the website, so the file is made smaller than both. See KB, MB and bytes for why this matters.

Worked example

A 4.2 MB phone photo of 3024 × 4032 pixels, with width 200 and height 230 typed in and maximum 20 KB, is cropped to the 200:230 shape, scaled down, and saved at the highest JPEG quality that fits. For a plain light background the result is usually about 15 to 19 KB at 70 to 90% quality.

Questions people ask

Will compressing to 20 KB reduce the quality?
Only as much as needed. The tool searches for the highest quality that still fits under 20 KB, and reduces the pixel size only when quality alone is not enough.
Is my photo uploaded to your server?
No. The photo is opened and saved by your own browser. You can switch off mobile data after the page loads and the tool still works.
My form says between 10 and 20 KB. What do I do?
Type the smaller number in Minimum KB. If the clean file comes out smaller, the tool adds harmless padding so it passes the minimum check without changing the picture.
Can I compress a PNG or an iPhone HEIC photo?
Yes. PNG, WEBP, JPG and iPhone HEIC photos all work, in any browser (outside Safari, a HEIC photo takes a few seconds to open). The result is saved as JPG unless you choose another format.

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