Some forms reject photos below a minimum file size. Here's how to increase an image to the required number of KB while keeping it a valid, viewable file.
Why a form rejects a photo for being too small
Most size rules are maximums, but some portals also set a minimum file size — often to reject low-quality thumbnails. If your photo is already well-compressed, it may fall below that floor, and the form won't accept it.
Increase the file size safely
This tool re-saves your image at high quality and appends harmless padding after the JPEG's end marker to reach your target. The result still opens normally in any viewer or upload form — it just weighs more.
Try it now
Increase Image Size in KB
When to use this vs. resizing
- Use this when the form checks file size (KB) and yours is below the minimum.
- If the form checks pixel dimensions instead, resize the image to larger dimensions.
- You can combine approaches: enlarge the dimensions first, then top up the file size.
The padding technique keeps the image visually identical — no stretching or quality loss. Everything runs locally in your browser.