How to use Compress Image to 20 KB
- 1. Crop first. Crop to just the signature or photo before compressing — background pixels waste the tiny budget.
- 2. Drop it here. The 20 KB target is pre-set; the tool balances quality and size automatically.
- 3. Download the file. Named -compressed.jpg, ready for the portal.
About this tool
20 KB is tight — roughly a 500–800px JPEG at moderate quality. Signatures survive this easily because they're mostly white space; photos need a tight crop to stay recognizable.
Signature upload checklist
Sign with a dark pen on plain white paper, photograph from directly above without shadows, crop to the signature edges, then compress here. If the portal specifies dimensions too (like 140×60), resize to those exact pixels first.
Code examples
Typical result
photo.jpg · 3.8 MB → 97 KB (−97%) · 1512×2016 · quality 82%Common form limits (pixels and KB)
Passport photo 413×531 px ≤ 50 KB (3.5×4.5 cm at 300 DPI)
Exam form photo 200×230 px ≤ 50 KB
Exam signature 140×60 px ≤ 20 KB
PAN card photo 213×213 px ≤ 30 KB
US visa photo 600×600 px ≤ 240 KB (2×2 in at 300 DPI)cm to pixels at 300 DPI
pixels = cm × 118.11
3.5 cm → 413 px · 4.5 cm → 531 px · 2 in (5.08 cm) → 600 px