How to use Compress image to 100 KB
- 1. Choose your imageClick Choose files or drag a JPG, PNG or WebP image onto the box.
- 2. Click ConvertKeep Target size on 100 KB or pick another limit, then click Convert.
- 3. Download the JPGThe file is always at or under the size you picked.
How it works
The tool uses the highest JPG quality that fits under the limit. If even low quality is too big, it reduces the size in pixels step by step until the file fits.
A KB is counted as 1,000 bytes. That is the stricter reading, so the file passes forms that count either way.
Typical limits
| Limit | Usually for | What to expect |
|---|---|---|
| 20 KB | Signatures | Small but clear for a signature or thumb impression |
| 50 KB | Passport-style photos | Fine for a face photo at form size |
| 100 KB | Photos and ID scans | Good quality for most photos |
| 200 or 500 KB | Documents and certificates | Text stays readable |
| 1 MB | Full-page scans | Close to the original |
Tips for forms
- Check whether the form also asks for exact dimensions, such as 200 × 230 pixels. This tool only sets the file size. Use Resize image or Crop image for the dimensions.
- Photograph documents in good light. A clean image compresses smaller and stays readable.
- The result is always a JPG, which almost all forms accept. PNG and WebP images are converted to JPG.
Privacy
The compression runs in your browser. Your photos and scans are not uploaded to a server.
Frequently asked questions
How do I reduce a photo to under 100 KB?
Add the photo, keep 100 KB selected and click Convert. The JPG you download is 100 KB or less.
Will the photo look worse?
Only as much as needed to fit. Phone photos usually still look good at 100 KB. At 20 KB, expect a smaller and softer image.
Can I compress a PNG to 50 KB?
Yes. Pick 50 KB. The result is a JPG, which most forms want anyway.
What if my image is already small enough?
A JPG that already fits is returned as it is. Only its hidden metadata, such as camera and location, is removed.
Can I compress several images at once?
Yes. Add them all and click Convert. Each one is made to fit the same limit.
Can I compress without a fixed size?
Yes. Use Compress image. It makes files smaller and keeps their format and size in pixels.