Increase image size in KB
Some forms refuse a file for being too small, which feels backwards when every other site begs you to shrink. This tool grows the byte count without touching a single pixel, so the upload finally goes through.
Drop images here or click to upload
PNG, JPG, WebP, GIF, AVIF, HEIC — up to 50MB each
Pads the file up to your minimum without changing the picture. Already larger files are left as they are.
- Files never leave your device
- Runs in your browser
- Free, no signup
How padding the size actually works
The tool appends filler bytes after the real image data, so the picture itself never changes. Your dimensions, colors, and sharpness stay exactly as they were, and only the number of kilobytes goes up. A viewer still sees the same photo, byte for byte, in the visible region.
If your file already sits at or above the minimum you set, it is left untouched. There is no upscaling and no quality change, because this is the opposite of compression. When you need to go the other way instead, compress to a size drops the byte count.
Why a minimum size even exists
Plenty of portals enforce a range, such as 20 KB to 50 KB, and reject anything under the low end. The rule usually exists to filter out blank, corrupt, or near-empty uploads. Your clean logo or signature can legitimately land below that floor.
A common fix is to pad a tiny file up to the lower bound and submit. You can pad to a specific target with increase to 50 KB, or change the picture's pixel count with resize the image when the form also limits dimensions.
What this tool will not do
It does not sharpen, enlarge, or improve a small picture. Padding adds invisible bytes, so a blurry 100-pixel thumbnail stays a blurry 100-pixel thumbnail at a bigger file size. If you need more visible detail, you need a higher-resolution source, not more bytes.