About PhotoKB
The privacy-first image suite designed to give every photo the perfect size.
PhotoKB was created to solve a persistent frustration faced by millions of candidates, students, job seekers, and web creators worldwide: online form photo size rejection.
When applying for competitive examinations (like SSC, UPSC, IBPS, NEET), visas, or identity cards, users are repeatedly prompted with strict warnings like “Photo must be between 20 KB and 50 KB” or “Signature must not exceed 20 KB”. Most legacy tools require uploading private pictures to insecure third-party servers or downloading ad-heavy software.
100% Client-Side
Zero file uploads to external servers.
Sub-Second Speed
Canvas binary search algorithms.
100% Free Forever
No watermarks, no registration.
Our Technology Guarantee
PhotoKB uses standard HTML5 Canvas and modern WebAssembly features that run locally inside your browser sandbox. When you compress or resize an image on PhotoKB, the processing takes place entirely on your device's processor (CPU/GPU). Your private documents, ID proofs, and signatures never leave your hardware.
Try Our Popular Optimization Tools
Exact size for SSC & UPSC signatures
Passport & candidate photo resizer
High quality certificates & documents
Custom width & height in px, cm, inch
Official 3.5x4.5 cm and 2x2 inch standards
Convert JPG, PNG, and WebP instantly
Combine multiple photos into one PDF