Compress to 100 KB in three steps
Choose an image, select WebP or JPG and wait for the preview to finish. The compressor searches for the highest quality that remains below 100 KB. Download the finished file and submit that exact copy to the destination service.
Do not judge the result only by the quality number. Different source dimensions, camera noise and image detail affect the final size. A clean portrait can stay sharp at 100 KB, while a detailed landscape may need smaller dimensions to meet the same ceiling.
- WebP: efficient for modern websites and supported forms
- JPG: dependable for older portals and photo uploads
- PNG: useful for logos and transparency, but often too large for photos
- AVIF input: accepted when the current browser can decode it
Preserve readable faces and document details
For a profile photo, crop away unused background before compressing. This gives the remaining face more pixels within the 100 KB budget. For a scanned document, verify that names, dates and small printed text are still readable at normal zoom.
If the first result is too soft, return to the source and remove unnecessary borders or empty space. A better crop often improves clarity more than forcing a higher quality setting into the same size limit.
Avoid upload-limit surprises
Some services calculate one kilobyte as 1,000 bytes while browsers commonly report 1,024 bytes. A conservative target such as 98 KB can help when a portal rejects files that appear to be exactly 100 KB.
Also confirm the accepted format and pixel dimensions. File size is only one validation rule: a service may separately require JPG, a square crop or a minimum width. The downloaded file must satisfy all of those conditions together.