How to Compress a PNG Without Resizing It

Choose between lossless and palette compression

The Compress PNG tool offers a lossless mode and smaller 256, 128, or 64 color palettes. Lossless compression preserves every decoded pixel color. A palette can reduce the file further, but subtle gradients and photographic areas may change.

Keep dimensions separate from compression

Compression changes how the pixels are encoded, not the image width or height. If a PNG is large because it contains many pixels, compression alone may have a limited effect. Keep the source dimensions when the image must remain sharp at its current display size.

Check transparency and animation

Inspect transparent edges over both light and dark backgrounds. For animated PNG files, play the downloaded result and check every frame, transition, and delay. The compressor preserves APNG frame order and timing, but palette reduction can still affect the visible colors.

Use the result only when it is smaller

An already optimized PNG may not shrink. The tool compares the result with the source and offers a download only when the new file is smaller. For photographs where exact colors and transparency are unnecessary, Compress JPEG may produce a more practical file; use Images to PDF when the images belong in a document.