The Form Rejects Your Image Because It Is Too Small in KB

Need to Increase an Image's File Size to a Target KB?

You have an image that is too small for a platform's minimum file size requirement. You could open an image editor, add noise, re-export, and guess — or you could use a tool that increases the file size to an exact target while keeping the original dimensions intact.

OnliTools Increase Image Size in KB

OnliTools Increase Image Size in KB increases image file size to a target KB or MB while preserving the original width and height. Upload your image, set the target size, and download the result. All processing happens in your browser.

How to Use It

1. Go to onlitools.com/increase-image-size.
2. Upload your image.
3. Enter the target file size in KB or MB.
4. Download the resized image.

Great For

• Form submissions — meet minimum file size requirements for uploads
• Printing services — ensure images meet size thresholds without changing dimensions
• Quality control — adjust file size for specific platform constraints

Wrap Up

No image editor, no guesswork, no upload to a server. OnliTools Increase Image Size in KB hits your target file size while keeping the image exactly the same dimensions.