How to use Compress Image to 100 KB
- 1. Drop your photo. PNG, JPEG, or WebP — the 100 KB target is pre-selected on this page.
- 2. Wait a second. The tool searches quality levels first and only shrinks dimensions if it must.
- 3. Download. The result lands just under 100 KB — compare before/after with one click.
About this tool
100 KB is the most common cap on application portals — big enough for a clearly readable document photo, small enough to keep their storage light. The best result comes from lowering encoder quality before touching resolution, which is exactly the order this tool works in.
Passport photos, marksheets, signatures
Photograph documents straight-on in good light, crop tight before compressing, and keep JPEG format if the portal specifies .jpg. A tight crop wastes none of your 100 KB on background.
If 100 KB still looks soft
Your source is probably a 4000px phone photo being squeezed hard. Resize to around 1200–1600px on the long edge first (see the resize tool), then compress — more of the budget goes to quality instead of pixels.
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