PNG Image Compressor
Quantize PNG colors and optimize compression tables for smaller file footprints with full alpha channel support.
Drag & drop image files here, or click to browse
Supports PNG, JPG, WebP, AVIF, GIF, TIFF, SVG, HEIC. Upload up to 10 MB aggregate per batch.
Fast Libvips Multi-Threading•Automatic EXIF Orientation•Zero Quality Loss Cropping
How to Compress PNG Images
Shrink PNG graphics and screenshots while keeping crystal-clear transparency.
1
Upload PNG Images
Select or drag your PNG images into the dropzone.
Tip: Transparent logos, icons, UI assets, and screenshots are fully supported.
2
Set Optimization Level
Use the quality slider or set a Max File Size (KB). The engine optimizes compression palettes.
Tip: Full 8-bit alpha transparency is strictly preserved.
3
Download Optimized PNGs
Click Compress and download your compact PNG files individually or as a ZIP.
Tip: No dark borders or halo artifacts are introduced.
Technical Specifications & Performance
Architectural limits, processing engine, and format standards.
Client-First & Ephemeral
Transparency HandlingFull 8-bit alpha channel preservation
Palette QuantizationAdaptive color reduction & Floyd-Steinberg dithering
Compression AlgorithmZlib Deflate level 9
Frequently Asked Questions
Common Questions & Answers
Clear answers about image formatting, compression standards, and privacy.
Can PNG files be compressed without losing transparent backgrounds?
Yes. Our PNG compression engine optimizes the internal color palette while keeping the alpha transparency channel intact, ensuring logos and UI graphics remain clean on any background.
Why are raw PNG files often so large?
PNG is a lossless format that stores exact pixel color values. Screen captures and graphics often include millions of redundant color nuances that can be quantized into compact indexed palettes with zero noticeable difference.