CompressNeo
Format Specific mode

Compress PNG Online

PNG is a lossless format, which maintains perfect clarity but can result in very heavy files. Adjust or convert to modern formats. Process files locally, ensuring complete privacy.

Drag & drop files here, or click to browse

Supports PNG, JPG, WebP, AVIF, SVG, and GIF (static). Fully secure, runs 100% locally.

Global Presets

Set compression profile for all queued files.

Quality level 80%
Max Compress Balanced Max Quality

About PNG Compression:

PNG (Portable Network Graphics) is a lossless raster graphics format that employs the DEFLATE algorithm, which combines LZ77 and Huffman coding. PNG is optimal for graphics requiring pixel-for-pixel accuracy, such as logos, screenshots, charts, and illustrations containing sharp lines or text that would degrade under lossy compression. PNG also features full support for 8-bit alpha transparency channels, allowing smooth anti-aliased edge blending on varied page backgrounds. However, because it is lossless, PNG files can be extremely heavy. CompressNeo optimizes PNG files by using WebAssembly-based compression filters that rewrite pixel prediction values and optimize Huffman tables. While quality sliders are not supported for lossless PNGs, converting heavy PNG mockups to WebP or AVIF can yield up to an 80% reduction in file sizes.

Best Practices & Pro Tips:

  • Use PNG for screenshots, logos, and charts to preserve razor-sharp text outlines.
  • For photograph files, convert to WebP to save up to 80% on file sizes.
  • Use lossless SVG or PNG formats for assets requiring alpha channel transparency.