How to reduce a photo to 20 KB or 50 KB for online application forms

"File size must be between 10 KB and 50 KB." "Photo dimensions: 200 × 230 pixels." If you've applied for an exam, a government job or a visa online, you've probably met rules like these, and watched a perfectly good phone photo get rejected because it's 3 MB.

What the form is checking

Upload forms usually check up to three things:

1. File size in KB, a maximum and sometimes a minimum.
2. Pixel dimensions, such as 200 × 230 or 350 × 450.
3. Format, almost always JPG.

A phone photo fails all three: it's several megabytes, around 3000 × 4000 pixels, and sometimes HEIC or PNG.

Meet every rule at once

1. Upload the photo (or a scan of your signature).
2. Set the maximum size. Quick buttons cover 10, 20, 50, 100 and 200 KB.
3. If the form gives a minimum too, turn on The form also has a minimum size.
4. If it asks for exact dimensions, turn on Resize to exact pixels and type them in. Choose Crop to fill to avoid white bars.
5. Compress and download. The result shows the final size and dimensions so you can check before uploading.

Signatures

Many forms also want a signature image, often under 10–20 KB. Sign in dark ink on plain white paper, take a photo in good light, then:

• Clean it up with the Signature maker: upload the photo and it removes the paper, leaving crisp ink.
• Compress the result to the required KB size.

KB vs kB

Most forms treat 1 KB as 1,024 bytes. We do the same, so a file under "20 KB" here is under 20 KB on the form too.

Still rejected?

• Wrong format: make sure the file ends in .jpg, not .jpeg.png or .heic.
• Below the minimum: set a minimum size so the tool keeps more quality.
• Background rules: some exams want a white or light background, which the passport photo maker can replace for you.