ImagesCompressor
Compress Images
PNG COMPRESSION TOOL

Compress PNG images while keeping transparency

Process screenshots, interface graphics and transparent artwork locally in your browser, with PNG preserved as the default format.

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What makes PNG compression different?

PNG is a lossless format commonly used for logos, screenshots, diagrams and images with transparent pixels. Its behavior differs from JPEG: a normal Canvas quality value does not directly control PNG compression. File size is strongly influenced by dimensions, color complexity, transparency and the encoder.

Compress mode keeps the original PNG format by default. This is useful when transparency or exact pixel edges matter. If you do not need PNG-specific behavior, a WebP copy may be worth comparing because it can support transparency with different file-size tradeoffs.

A practical PNG workflow

  1. Select PNG files and confirm that transparency or sharp graphic edges are important.
  2. Choose a maximum dimension that fits the destination. Avoid resizing small logos upward.
  3. Set an approximate maximum size, understanding that the target cannot be guaranteed.
  4. Process the queue and inspect both dimensions and file size.
  5. Download the useful results while keeping original source files as backups.

Transparency and visual review

PNG supports an alpha channel, so partially transparent shadows and anti-aliased edges can remain intact. When evaluating a result, preview it on both light and dark backgrounds if the final design may use both. Converting to JPEG removes transparency and fills those areas with white in this tool.

Screenshots with many flat-color areas often suit PNG. Photographic screenshots or exports with gradients can become large, and a WebP or JPEG copy may be more efficient when transparency is not required. Format choice should follow the content and destination rather than a single rule.

PNG compression FAQ

Does the quality slider compress PNG like JPEG?

No. Canvas PNG export generally ignores the quality parameter, so the interface explains this whenever PNG conversion is selected.

Will transparency be preserved?

Yes when PNG remains the output. A later conversion to JPEG cannot preserve transparent pixels.

Why can a PNG stay large?

Large pixel dimensions, detailed photographic content and many colors can all make a lossless PNG heavy even after processing.

Next step: Learn when to convert PNG to WebP or open the PNG to WebP tool.