ImgBunny

PNG Compressor

Compress PNG Online

Reduce PNG file sizes significantly while preserving transparency and sharpness. Powered by OxiPNG — industry-leading lossless PNG optimization.

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Why Use ImgBunny for PNG Compression?

Preserves Transparency

Alpha channel is fully retained. Your transparent PNGs remain perfectly transparent after compression.

Lossless by Default

OxiPNG lossless mode removes metadata and optimizes encoding without changing a single pixel.

Browser-Based

All compression happens in your browser via WebAssembly. Zero server uploads, completely private.

Batch Compression

Upload up to 10 PNG files at once. Compress your entire icon set or asset library in seconds.

Frequently Asked Questions

Does PNG compression affect image quality?

Not with lossless compression. ImgBunny uses OxiPNG which re-encodes PNG data more efficiently without modifying any pixels. Lossy mode (converting to WebP) can reduce sizes by 70%+ with minimal visible difference.

Will transparency be preserved?

Yes. PNG transparency (alpha channel) is fully preserved in all compression modes. This is especially important for logos, icons, and UI assets.

How much can I reduce a PNG file size?

Lossless compression typically reduces PNG sizes by 10–30%. Converting to WebP format can reduce sizes by 50–80% while maintaining near-identical visual quality.

Can I compress PNG files in bulk?

Yes. Drag and drop up to 10 PNG files at once and compress them all in a single click.