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Compress PNG

Compress PNG files in your browser. Compare original and output sizes, preview results and download files or a ZIP.

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Compression settings

Lossless PNG optimization. Pixel samples, transparency and metadata are preserved. Animated PNG stays unchanged.

If the candidate is not smaller, the original file is retained.

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HOW IT WORKS

Three steps. Ready for what’s next.

01

Add your files

Choose PNG files or a folder. Files stay on your device.

02

Compress and compare

Recompress PNG data without changing its pixel samples.

03

Download the results

Download each result or one ZIP. If compression does not save space, the original is retained.

About Compress PNG.

Compress PNG locally

Upload one or more files, review the before-and-after sizes and download your results. Processing takes place in your browser. Each file can be up to 50 MB.

What changes

The compressor compares high-compression DEFLATE streams and, for non-interlaced images, adaptive scanline filters. Original pixel samples, color profiles and ancillary chunks are preserved. Animated PNG files are kept unchanged. There is no lossy palette reduction.

Compare before saving

An already optimized file may not shrink. The tool keeps the original whenever the candidate is equal to or larger than the input, so a download never grows because of compression. Quality and dimension changes only apply when that candidate is smaller. ZIP downloads keep safe source folder paths and file names.

Browser compatibility

No conversion service or account is required. Raster processing is limited to 40 megapixels and 16,384 pixels per side. Large batches are processed sequentially; ZIP output is limited to 500 MB.

A LITTLE CLARITY

Good questions. Simple answers.

A few helpful answers before you get started.

Do I need an account?

No. This tool is open to everyone without signing in.

Does this tool need the internet?

The files are processed on your device. Open the tool online once to load its assets.

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