Reduce PNG File Size Online (Preserve Transparency)
Compress PNG images online without losing transparent background or clarity. Free, client-side, unlimited batch processing.
Supported Documents: Optimized PNG (undefinedKB)
About this Preset
PNG files use lossless compression, which preserves transparent alpha channels and pixel-perfect lines, but often creates huge file sizes (sometimes 5 MB to 15 MB for screenshots and logos). Our PNG optimizer strips excess metadata, palette redundancies, and unneeded color depth while preserving transparent backgrounds intact. For extreme size reduction, you can also convert transparent PNGs to modern WebP with alpha support.
How to Resize in 4 Simple Steps
- Upload PNG files with or without transparency.
- The engine quantizes color distribution and optimizes compression.
- Verify that transparency remains clean and edges are smooth.
- Download your lightweight PNG or WebP file.
Frequently Asked Questions
Does reducing PNG size remove transparency?
No. Our tool fully preserves the 8-bit alpha transparency channel.