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Increase an image’s size in KB.

Some forms reject a photo or signature for being too small — “minimum 20 KB”. Type the size you need and get the same picture back, grown to exactly that many kilobytes.

  • The file is enlarged on your device — nothing is uploaded
  • Pixels, dimensions and quality stay exactly as they were
  • Lands on the size you type, to the byte, for JPG or PNG

How it works.

  1. 1Drop your JPG or PNG files into the box above.
  2. 2Type the smallest size your form accepts — for example 20 KB.
  3. 3Tap Increase size. The file is enlarged on your device; nothing is uploaded.
  4. 4Download it. The result card shows the new size.

Frequently asked questions

How can a file get bigger without changing the picture?

JPG and PNG both have a standard comment field that image viewers skip over. The tool fills it with blank text until the file reaches your size. The pixels, dimensions and quality are untouched — open both versions side by side and you will see no difference.

Why would a form reject a small photo?

Portals use a minimum size as a rough guard against blank, blurry or placeholder uploads. A clear, tightly cropped signature can still fall under 10 or 20 KB simply because it compresses well — which is exactly the case this tool fixes.

The form says between 20 and 50 KB. What should I enter?

Anything inside the range works; aim for the middle, such as 30 KB, so rounding on the form’s side cannot push it out. If your file is currently above 50 KB, compress it first, then bring it back here if it lands too small.

Wouldn’t raising the quality do the same job?

It can, but it re-compresses the photo and gives you no control over the final size. Padding lands on your number exactly and changes nothing you can see. If you want a genuinely sharper image, start from a bigger original instead.