Image tool
Compress to 100 KB
Aim for a 100 KB file for forms, email, and uploads with size limits. Quality is reduced first; the image is scaled down only if needed.
- Free to use
- Processed on your device
- No account needed
We try lower quality, then smaller dimensions, aiming for 100 KB or smaller. JPG and WebP work best for a size cap.
PNG input is converted to JPG or WebP here. PNG quality does not work like lossy compression. Check any minimum pixel dimensions required by your upload form.
Why 100 KB is a common limit
Government portals, school admissions, visa uploads, and older HR systems often cap images at 100 KB. Hitting that number with a phone photo is hard without help: a single HEIC or JPG from a modern camera can be several megabytes. This tool repeatedly adjusts encoding quality and, if needed, scales the image down until the file is at or under 100 KB—or tells you it cannot get there.
For best results, crop or resize to the dimensions the form actually displays before you chase 100 KB. A 4000-pixel image crushed to 100 KB looks worse than a 1200-pixel image compressed gently to the same cap.
What “under 100 KB” costs visually
Expect softer detail and possible banding in skies or gradients on difficult photos. That is usually acceptable for identity thumbnails and document selfies where the reviewer only needs recognition, not print quality. If the result is unreadable, increase dimensions slightly in a retake or use a simpler background with more even lighting.
A worked example and help
Need a portal limit? Start with the exact byte cap and check minimum dimensions too. Our generated 733,759-byte JPG reached 99,526 bytes at 1200 × 800 in the measured Chrome run; that result is source-specific and uses lossy quality 15.
Related tools
Stay in the browser for the next step — convert, compress, crop, or strip metadata.
- Compress to 200 KBShrink a JPG or WebP until it is 200 KB or smaller.
- Image CompressorReduce file size in your browser. Set a percent of the original, aim for 100 KB or 200 KB, or compress JPG, PNG, and WebP.
- Compress JPGReduce JPG file size in your browser to a target percent of the original bytes.
- Image ResizerResize images to exact pixel dimensions without uploading them.
FAQ
Will every image fit under 100 KB?
Very large or detailed photos may need more shrinking. If we still can’t get there, you’ll see a clear message.
Frequently asked questions