Last updated: October 2026
Compress image to 100KB online free — hit the exact limit
Short answer: drop your image above, type your target size in KB (100 is the classic portal limit), pick JPEG, WebP or PNG, and click Compress image — the tool binary-searches the quality setting until the file lands at or under your target, then lets you download it. No signup, no upload, no limit on the original size.
How it works
1. Drop an image onto the box (or tap it on your phone) — JPG, PNG, WebP, any size. 2. Set the target size your form demands and choose the output format: JPEG for photos, WebP for ~30% smaller files, PNG when you need lossless screenshots or logos. 3. Click Compress image. The tool tries 8 quality levels at full resolution to land under your target; only if that fails does it shrink the dimensions — and it tells you when it did.
Most "compressors" give you a quality slider and make you guess-and-check against the limit. This one aims at the number directly, which is what you actually need when a job portal rejects anything over 100 KB.
Which format should you choose?
JPEG is the smallest choice for photographs and the safest for picky upload forms. WebP beats JPEG by roughly a quarter to a third at the same visual quality and works in every modern browser — pick it when the form accepts it. PNG is lossless, so it's the right call for screenshots, logos and images with text, but it can't squeeze photos as hard — for tough KB targets on photos, JPEG or WebP will win.
Frequently asked questions
How do I compress an image to exactly 100KB?
Drop your image above, type 100 in the target-size box, and click Compress image. The tool binary-searches the JPEG or WebP quality setting until the file lands at or under 100 KB, then lets you download it.
Which format should I choose?
JPEG is smallest for photos. WebP is usually 25–35% smaller than JPEG at the same quality and works everywhere modern. PNG is lossless — pick it for screenshots, logos and text, but expect bigger files.
Will it resize my image?
Only if it has to. The compressor first tries to hit your target at full resolution by tuning quality. If even the lowest quality is too big, it shrinks the dimensions in steps — and tells you when it did.
Is there a file size or image limit?
No. Compression runs entirely in your browser, so there is no upload and nothing to meter — a 20 MP photo compresses as easily as a small one.
Is my photo private?
Completely. Your photo never leaves your browser — there is no upload and no server sees it. Redrawing the image also strips hidden EXIF metadata like GPS coordinates, which is a privacy bonus before posting.
