Compress PNG Images Online — Free, No Upload
Lossless image format that supports full alpha transparency. Best for logos, graphics, and images requiring sharp edges. ImageSmith's free PNG compressor reduces file sizes by 60–90% using lossless compression, entirely in your browser. PNG compression is lossless. ImageSmith automatically converts PNG to WebP for up to 50% size reduction while preserving transparency.
✓Lossless compression preserves every pixel perfectly
✓Full alpha channel transparency support
✓Perfect for text overlays, logos, and UI elements
✓Wide compatibility with all modern software
Compress PNG to a Specific Size
Other Format Compressors
When to Use PNG
Use PNG when you need transparency, sharp text edges, or lossless preservation of graphics and illustrations.
PNG Compression FAQ
Upload your PNG image to ImageSmith, set your target file size or quality percentage, and click Compress. Your compressed PNG downloads instantly — no account and no watermark required.
PNG uses lossless compression — every pixel is preserved exactly. ImageSmith typically converts PNG to WebP for significant size reduction without any quality loss whatsoever.
PNG compression is lossless. ImageSmith automatically converts PNG to WebP for up to 50% size reduction while preserving transparency. ImageSmith uses a binary search algorithm to automatically find the highest quality setting that achieves your target file size.
Completely safe. ImageSmith runs entirely in your browser using the Canvas API. Your PNG images never leave your device — zero server uploads.
There is no file size limit. ImageSmith processes PNG images of any size locally in your browser. Larger images may take slightly longer, but there is no upload size cap imposed by our servers.