Compressors

PNG Compressor

Compress PNG files locally without losing transparent details.

Batch ready

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4 min readLast reviewed 2026-07-06

What this tool does

The PNG Compressor reduces PNG file size by re-encoding with tuned compression and optional scaling—useful for app icons, UI kits, and transparent marketing assets.

Files process in-browser so sensitive UI screenshots and unreleased brand assets never touch a third-party server.

Why you might need it

Design exports often produce 500 KB–2 MB PNGs where optimized versions fit CDNs and mobile apps better.

Transparent PNGs cannot fall back to JPEG—this tool targets lossless-friendly savings without flattening alpha.

Common use cases

  • Optimize favicon and app icon PNG sets before release
  • Shrink UI screenshot PNGs for documentation sites
  • Prepare transparent product cutouts for ecommerce CDNs
  • Compress PNG sprites for indie game builds
  • Reduce PNG email signature graphics

Step-by-step guide

  1. 1Add PNG files to the batch queue.
  2. 2Adjust quality or scale percentage—small dimension drops help oversized exports dramatically.
  3. 3Toggle metadata stripping if EXIF is unnecessary.
  4. 4Process All and review output sizes against originals.
  5. 5Download optimized PNGs or a ZIP bundle.

Tips & best practices

  • For flat icons with few colors, slight scale-down plus compression often beats quality slider alone.
  • Compare visually on retina screens—thin 1 px lines are the first casualty of aggressive settings.
  • Pair with SVG Optimizer if the source is vector-friendly and should not stay raster.
  • Keep uncompressed masters in version control; ship compressed copies to production.

Limitations

  • Photographic PNGs may still be larger than JPEG—consider PNG to JPG if transparency is not required.
  • Extreme compression can soften fine text edges in UI captures.
  • Does not convert to WebP—use PNG to WebP separately for web-only pipelines.

Frequently asked questions