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Compress JPG to 40 KB

Shrink photos and signatures to a size you choose, like 50 KB.

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How to compress a photo to 40 KB

40 KB is a photo-sized limit. Some application forms cap the applicant photo or a scanned signature at 40 KB, and others give a range that starts at 20 or 30 KB. This page is set to 40 KB and keeps the sharpest JPG under it.

  1. Add your photo, cropped to the shape the form asks for.

  2. Check the size box shows 40 KB.

  3. Click Compress images and confirm the final KB shown under the JPG.

Photo limits and ranges around 40 KB

Forms arrive at 40 KB in two ways. Some cap the applicant photo or signature image at 40 KB outright. Others publish a range whose lower end is nearby: Dhaka University's admission form takes a photo between 30 and 200 KB, and UPSC's application photo must be between 20 and 200 KB. A 40 KB file is valid for all of these, although with a wide range you are free to keep more quality by aiming higher.

For a head-and-shoulders photo, 40 KB is roomy enough that the face stays crisp at a few hundred pixels across. A whole document page photographed and squeezed into 40 KB is harder: headings survive, small print may not.

Landing inside a narrow range

The compressor steps through fixed settings and stops at the first one under 40,000 bytes, so the finished JPG can be anywhere from just under 40 KB to several KB less. With a narrow window, such as 30 to 40 KB, read the size in the result before uploading. If it fell below the minimum, run that JPG through Increase JPG Size, which pads the file to the size you enter without altering the picture. A JPG you add that is already under 40 KB is returned untouched.

Compress JPG to 40 KB FAQ

It passes, but you give up detail the form would accept, so aim nearer the top of a wide range. Pick 40 KB when the cap is 40 or 50 KB, and read the final KB in the result.

That can happen with a small or simple image. Use Increase JPG Size to pad the file up to the minimum; the picture itself does not change.

No. The tool runs entirely in your browser, so your files are processed on your own device and never leave it.

Yes. Every PDFCraftly tool is free, with no sign-up, no watermark and no email required.

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