How to use Compress PNG
- 1. Drop PNG files. Screenshots, graphics, logos — with or without transparency.
- 2. Let Auto decide. Opaque PNGs re-encode as JPEG; transparent ones become WebP with alpha intact. Force PNG output if you must keep the format.
- 3. Download. Singles or a batch ZIP, with per-file savings shown.
About this tool
PNG has no quality dial — the format is defined as lossless. Real PNG savings come from either switching codecs (JPEG/WebP for photographic content) or reducing dimensions, and this tool is explicit about which one it used on each file.
Keep PNG or convert?
Keep PNG for pixel-precise UI assets, logos with sharp edges, and images that must stay lossless. Convert to WebP for transparent images going on the web (much smaller, alpha preserved) and to JPEG for opaque screenshots and photos.
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