Compress an image to 150 KB
Scanned certificates and document uploads often land you at a 150 KB ceiling. It gives a scan enough room to stay legible without choking the portal. Set the compress to size tool to 150 KB and your scan goes through on the first try.
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 150 KB holds
150 KB is roomy enough for a readable A4 scan. A document at 800x1100 pixels keeps its text sharp and its lines clean. Photos benefit too, with a 700x700 portrait looking nearly untouched at this size.
Scanned text is where 150 KB shines. The extra headroom over a 100 KB cap means edges of letters stay crisp instead of fuzzing into the background. That difference matters when an officer has to read your name and dates.
Where the 150 KB cap lives
Many government job portals and admission sites set 150 KB for uploaded documents, mark sheets, and certificates. It is a deliberate step up from the photo caps, because a full page needs more detail than a face.
Scan in grayscale if the document has no important color. A grayscale scan compresses much smaller than full color, which leaves more of your 150 KB budget for actual sharpness rather than storing color you do not need.
Fitting a multi-page document
If a portal wants several pages in one file, each page eats into the 150 KB total. Compress each scan separately first, then check the combined size. Trimming wide margins and straightening crooked scans also frees up space without touching the text itself.