Resize Image in KB
Shrink a photo to an exact size in KB (20 KB, 50 KB, 100 KB…) and pixels for online forms, without losing more quality than needed.
Runs in your browser. Your text and files never leave your device.
How to resize an image to a size in KB
- Choose your photo, drop it on the box, or paste it with Ctrl+V.
- Type the largest size the form accepts, for example 100 KB, or tap a size button.
- If the form also asks for pixels (such as 300 × 300), enter the width and height.
- Check the preview and size, then press Download.
How the size is reached
File size depends on two things: how many pixels the image has and how strongly it is compressed. The tool first keeps your pixels and searches for the highest JPG quality that fits under your limit. Only when even low quality is too big does it reduce the pixel size, step by step, until the file fits. That way you lose as little sharpness as possible.
Popular sizes
Tips for online application forms
- Read the form's rules for both KB and pixels. Many reject files that match one but not the other.
- Use a plain light background and good light. A clean photo stays sharp at a smaller size.
- For signatures, use the signature resizer: it cleans the paper background and crops to the ink.
Frequently Asked Questions
How do I reduce a photo to 20 KB or 50 KB?
Choose the photo, then type the size or press one of the size buttons. The tool tries the best JPG quality that fits under that size, and only makes the picture smaller in pixels if quality alone is not enough.
Can I set an exact size in pixels too?
Yes. Enter a width and height, for example 300 × 300. "Crop to fill" trims the edges to match the shape; "Fit inside" keeps the whole photo and adds a white margin. If the KB limit is too small for those pixels, the tool tells you instead of failing silently.
Can I make an image bigger in KB?
Only up to its best quality. A small photo can't gain real detail, so the tool stops at high quality instead of padding the file with useless data. If a form needs a minimum size, enter larger pixel dimensions.
Does it change the DPI?
Online forms check the file size and the pixel size, not DPI. DPI only matters when printing, and it does not change the file size.
Are my photos uploaded?
No. Resizing happens inside your browser with the canvas feature built into it. Your photo never leaves your phone or computer.
Why does my iPhone photo not open?
iPhones save photos as HEIC, which most browsers outside Safari can't read. Share the photo as JPG, or change Settings › Camera › Formats to "Most Compatible".