Compress image to 100KB
Quick answer
100KB is the most common cap for sign-up uploads and web images: image cat binary-searches the quality locally to land just under 100KB while staying sharp.
100KB is one of the most frequently required size caps — exam registrations, government forms and website attachments often draw the line there. Drop an image in and image cat compresses it toward 100KB locally, free, with no file-count limit and nothing uploaded.
Why so many systems ask for 100KB
100KB is a classic balance between 'sharp enough' and 'easy on the server'. Registration photos and form images stay legible at 100KB while keeping uploads quick. image cat is built exactly for this 'compress to a target to beat the limit' job.
Quality at 100KB
Mid-resolution photos are usually fine at 100KB, and ID photos or document screenshots especially so. If your source is a multi-thousand-pixel image, image cat down-scales it to a size that fits — clean, just no longer the original resolution.
How it differs from generic compressors
Generic tools often give you a single 'quality' slider and leave you guessing. image cat targets 100KB directly — binary-searching quality and, if needed, stepping down resolution — so you converge in one go instead of trial and error.
Frequently asked questions
Yes. image cat binary-searches between quality and size to land just under 100KB, lowering resolution if needed so the result never exceeds the target. If the content is too detailed to fit, it returns the smallest best-effort result and tells you.
Mid-resolution photos, ID photos and document screenshots are usually sharp at 100KB. Only very high-resolution images need heavy down-scaling — shrink them with the resize tool first if needed.
No. Compression runs locally in your browser, files are never uploaded, and it's free with no file-count limit.
Updated · image cat team