Can a PNG be compressed without losing quality?

Yes. PNG is a lossless format, and re-encoding with better compression settings produces a smaller file with exactly the same pixels. Gains vary by image — a well-optimized PNG may barely shrink, and the tool reports that honestly.

How do I get a PNG dramatically smaller?

Accept a lossy conversion to WebP. It usually keeps visual quality high while cutting file size substantially, and it still supports transparency. The tool only converts when you explicitly pick that option.

Is my PNG uploaded to your servers?

No. Your browser decodes and re-encodes the image locally. No bytes, no filenames, nothing about your image ever leaves your device.

Will compressing keep the transparent background?

Yes for lossless PNG compression and for WebP conversion. JPEG has no alpha channel, so converting a transparent PNG to JPEG flattens it onto a solid background — the tool warns you before that happens.

Compress PNG images — keep every pixel

Make PNG files smaller in your browser with a genuinely lossless re-encode: identical pixels, identical transparency, smaller file. Optional lossy conversion to WebP is available when you want bigger savings and can accept a format change.

Open the PNG compressor tool Runs entirely in your browser — files never leave your device.

What this tool does

PNG files often carry baggage: larger color palettes than needed, unfiltered scanlines, metadata and uncompressed chunks. This tool re-encodes the image with stronger lossless compression, which is why the result is pixel-for-pixel identical to the original.

If a PNG is already efficiently compressed, honest lossless gains are limited by mathematics — the tool tells you when the output is not smaller rather than quietly switching to a lossy path. For large savings you can explicitly convert to WebP (or JPEG for photos), with a clear warning that transparency will not survive JPEG.

How to shrink a PNG without uploading it

Add your PNG. Drop one or more files into the tool on the home page.
Pick a mode. Choose lossless compression to keep every pixel, or an explicit conversion to WebP/JPEG for maximum savings.
Download. Each result shows its real measured size next to the original before you save it.

Supported operations

This list is generated from CompressKit's capability registry — only implemented and tested operations appear here.

Reduce file size

Lossless re-encode: identical pixels and alpha channel, smaller or equal file size — reported honestly either way.
Resize

Reduce pixel dimensions when you need the image smaller on screen, not just in bytes.
Convert format

Convert to WebP (supports transparency, usually much smaller) or JPEG (small for photos, but loses transparency).

Frequently asked questions

Can a PNG be compressed without losing quality?: Yes. PNG is a lossless format, and re-encoding with better compression settings produces a smaller file with exactly the same pixels. Gains vary by image — a well-optimized PNG may barely shrink, and the tool reports that honestly.
How do I get a PNG dramatically smaller?: Accept a lossy conversion to WebP. It usually keeps visual quality high while cutting file size substantially, and it still supports transparency. The tool only converts when you explicitly pick that option.
Is my PNG uploaded to your servers?: No. Your browser decodes and re-encodes the image locally. No bytes, no filenames, nothing about your image ever leaves your device.
Will compressing keep the transparent background?: Yes for lossless PNG compression and for WebP conversion. JPEG has no alpha channel, so converting a transparent PNG to JPEG flattens it onto a solid background — the tool warns you before that happens.

Ready to try it?

The PNG compressor tool runs on this site with no upload step — your file is processed by your own browser and saved back to your device.

Open the PNG compressor tool