Resize image to 40 KB

Choose an image and get a JPG under 40 KB at the best quality that fits. Useful for signatures and thumb impressions. Add a width and height below if your form also fixes the dimensions.

🔒 Runs in your browser. Your photos are never uploaded.

Width Height Unit cmmminpx Min size (KB) Max size (KB) DPI (for cm/in)

Which forms need a file under 40 KB

None of the exams we list asks for exactly this size right now, but many state and university forms do. Check the limit printed in your notification and pick the closest size at or below it.

Getting a sharp photo under 40 KB

• Start from the original camera photo, not a screenshot or a WhatsApp forward. Forwarded images are already compressed and lose more detail.
• Use a plain, light background. Busy backgrounds use far more bytes than a face does.
• Set the width and height your form asks for. A passport-style photo at 3.5 × 4.5 cm and 200 DPI is about 276 × 354 pixels, which fits well under 40 KB.
• Check the preview before you download. If faces look blotchy, crop closer rather than lowering the size further.

Other sizes

10 KB · 15 KB · 20 KB · 25 KB · 30 KB · 50 KB · 60 KB · 80 KB · 100 KB · 150 KB · 200 KB · 300 KB · 500 KB

Questions people ask

How do I reduce a photo to 40 KB on my phone?

Open this page in your phone browser, tap "Choose image", pick the photo, and tap Download. The result will be under 40 KB.

Is 1 KB 1000 or 1024 bytes?

Portals differ, so this tool stays under the limit by either definition. The file always fits.