Drop a photo and it's saved under 100 KB at the highest quality that fits. Large phone photos are scaled down to a smaller size so they stay sharp rather than blocky. It all runs in your browser: nothing is uploaded, with no sign-up or file limits.
How to use Compress Image to 100KB
Drop your images here or choose files.
Each one is compressed to 100 KB or less straight away. Change the Target file size, or type a Custom one, for another limit; add a Minimum size if the form gives a range.
If the form also limits pixel size, set Max width / height to 1280 or 800 as well.
Check the size and dimensions, then Download each image or Download all as a .zip.
Frequently asked questions
How do I reduce an image to 100 KB without losing quality?
Some loss is unavoidable when a file shrinks, but this tool keeps it low: it uses the best quality that fits, and scales the image down rather than letting it turn blocky. The before/after view shows the difference.
What does 100 KB mean here?
1 KB is counted as 1,000 bytes, so "under 100 KB" means at most 100,000 bytes. That is the stricter count, so the file also passes portals that count 1 KB as 1,024 bytes. Each result shows its exact size in bytes, so you can compare it with your form's limit.
Does it change the image dimensions?
Often, yes. A typical 12-megapixel phone photo can't fit in 100 KB at full size without heavy artefacts, so it is scaled down. Screenshots and smaller images often keep their full size. The new dimensions are shown next to each file.
Which format should I choose?
JPG for photos and the widest compatibility, which is what forms expect. WebP for websites where you want the smallest files at good quality.
Are my images uploaded?
No. They're compressed in your browser and never leave your device.
Where a 100 KB limit is common
Job portals and resume photos.
Visa, ID and some government application photos. Size the photo first with the passport size photo maker.
Marketplace and property listings, school portals and forms that cap each attachment.
Exam forms usually ask for smaller files; for those, use compress to 50 KB or 20 KB, and check the official notice.
How the 100 KB target is reached
Each image is first saved at a high quality. If it is still too big, the quality is lowered, but only to about half; after that the image is scaled down a step at a time until it fits. A photo with fewer pixels at decent quality looks cleaner than a full-size photo full of blocky artefacts. With a Minimum size set, a file that comes out too small gets a higher quality first, then larger dimensions, up to the original's.
To control the pixel size exactly, resize first with the image resizer.