Compress an image to 100 KB
If you have ever filled out a government or job application, you have met the 100 KB limit. It is the most common web cap for ID photos and profile pictures. Point the compress to size tool at 100 KB and the box behaves.
Drop images here or click to upload
PNG, JPG, WebP, GIF, AVIF, HEIC — up to 50MB each
Output lands at or under your target. JPEG and WebP only.
- Files never leave your device
- Runs in your browser
- Free, no signup
What 100 KB buys you
100 KB is a comfortable size for a clear portrait. You can hold a 500x500 to 700x700 image with good color and only mild softening on fine detail. For most ID and passport-style photos, the result looks clean to the eye.
This is the sweet spot where photos still feel like photos. JPEG is the format to use here, since it stores photographic detail efficiently. You can read more about how JPEG trades detail for size on MDN.
Why 100 KB is everywhere
Forms love this number because it balances quality against storage. A clear photo fits, yet the server is not flooded with multi-megabyte files from every applicant. ID portals, exam sites, and HR systems lean on it constantly.
If your camera produced a large image and it will not fit, resize the image first to around 600 pixels on the long edge. That alone often drops you near the target before any quality is sacrificed.
A tip for ID photos
Match the required dimensions before compressing. Many ID forms expect a specific pixel size, like 413x531 for some visa photos. Set those dimensions, then compress to 100 KB, and you satisfy both rules at once.