zippydevtoolsCompressors
PNG Compressor (browser)
Compress PNG files locally with safe lossless and more aggressive size-reduction modes.
- Local browser processing only: no file upload.
- No remote persistence for input or output files.
Processed locally; the file never leaves your device.
Drop a PNG here or choose it from your device
One file at a time, up to 25 MB.
Compress PNG files locally with safe lossless and more aggressive size-reduction modes.
Standard tool execution runs in the browser, with no dedicated backend for processing inputs.
- Paste or enter data in the input panel.
- Use Process, or let automatic processing run when available.
- Review the result, copy the output, and validate it before critical use.
- Lossless PNG compression
Lossless PNG compression
Input: Upload a PNG and choose safe mode
Output: Smaller PNG download with preserved transparency.
Is my PNG file uploaded to a server?
No. Compression runs locally in the browser using a Web Worker.
What is the difference between safe and aggressive mode?
Safe prioritizes visual preservation without loss; aggressive targets smaller size with possible minor loss.
Is quality required in aggressive mode?
Yes. Aggressive mode requires a quality value between 0 and 100.
Is there an upload size limit?
Yes. The current limit is 25 MB per PNG file.
Is PNG transparency preserved?
Yes. The workflow is designed to preserve transparency in the output file.