Compress Image to 100KB: what it does
Online forms for jobs, exams, visas, scholarships and ID cards often reject photos and scans over 100 KB. Drop your image and the tool brings it under 100 KB automatically: it first lowers JPG quality step by step to find the highest quality that still fits, and only reduces the dimensions if quality alone isn’t enough. The result is a standard JPG that portals accept. Change the number to hit any other limit (20 KB, 50 KB, 200 KB, 500 KB…). The limit is counted in thousands of bytes, so the file passes whether the website counts 1 KB as 1,000 or 1,024 bytes. Your photo and documents stay on your device: nothing is uploaded.
How to use it
- Drop your images into the box, paste them, or tap to choose them from your phone. Add as many as you like.
- Pick the output format and quality. Optionally set a maximum size or a target file size in KB.
- Each image is processed on your device and listed with its old and new size.
- Download images one by one, or all of them as one ZIP.
Tips
- Crop first: a passport photo needs only the head and shoulders, and fewer pixels means more quality within 100 KB.
- If the form also asks for exact dimensions (for example 200 × 230 px), resize to those first with the image resizer’s “Custom size”, then compress here.
- Signatures and scanned text stay readable at small sizes if you set “Max size” to about 800–1200 px before compressing.
- Check the form’s minimum size too: some portals reject files under 10 or 20 KB.
- Keep the original. If you need a different limit later, compress from the original again rather than from the 100 KB copy.
Frequently asked questions
How do I reduce a photo to under 100 KB?
Drop it in the box above. “Target file size” is already set to 100 KB, so the tool lowers the JPG quality and, only if needed, the dimensions until the file is under 100 KB. Click Download.
Why is my file 97 KB and not exactly 100 KB?
The tool aims just under the limit and measures it in thousands of bytes (100 KB = 100,000 bytes), so it passes on every website. Most computers show sizes in 1,024-byte KB, which makes the same file look like about 95–98 KB.
Can I compress to 20 KB or 50 KB?
Yes. Type any number in the target box. Very small limits (under 30 KB) usually also need smaller dimensions; the tool reduces them automatically.
Will the photo still look clear?
For a passport-style photo or a signature, yes: 100 KB is plenty for the 300–600 px images most forms show. Large landscape photos lose more detail, because they have more pixels to fit into the same space.
Is it safe for ID documents?
Yes. The compression happens in your browser on your device. Nothing is uploaded, stored or seen by anyone.