Increase Image Size in KB
Increase a photo's file size up to a minimum number of KB required by a form.
About Increase Image Size in KB
Some upload forms reject images that are below a minimum file size. This tool increases an image's file size to a target number of KB by re-saving it at maximum quality and adding harmless padding, so the result still opens as a normal JPEG. Enter the minimum KB your form needs and download a file that meets the requirement. Everything runs locally in your browser.
How to use Increase Image Size in KB
- 1
Upload the image that is currently too small.
- 2
Enter the minimum file size you need in KB.
- 3
Click Increase — the file is padded up to your target.
- 4
Download the resulting image.
Frequently Asked Questions
How is the file made larger without changing how it looks?
The image is re-encoded at high quality and extra bytes are appended after the JPEG's end marker. Viewers ignore those bytes, so the picture looks identical but the file is bigger.
Will the image still open normally?
Yes. The output is a valid JPEG that opens in any image viewer or upload form.
Does this upload my image?
No. All processing happens locally in your browser.
More Image Tools
Add Watermark to Image
Stamp text watermarks onto images with custom position, opacity, size and color.
AVIF to JPG
Convert AVIF images to universally-supported JPG format instantly and locally in your browser.
AVIF to PNG
Convert AVIF images to widely-supported PNG format instantly and locally in your browser.