Compress PNG
Compress PNG with palette quantization and maximum DEFLATE. Screenshots and graphics shrink 50-70%, transparency preserved.
Drag files here or click to upload (multiple files supported)
Ctrl+V to paste from clipboard
How to compress PNG
- 1Upload your PNG file by dragging, clicking, or pasting.
- 2Adjust quality settings if needed.
- 3Click 'Convert Now' and wait for the conversion to complete.
- 4Download your converted PNG file.
About PNG compression
PNG uses DEFLATE lossless compression, and retains complete metadata and full color depth information in original exports. Some export tools use suboptimal encoder implementations, resulting in excessively large file sizes.
PNG compression optimizes the DEFLATE compression process by adjusting quantization parameters to reduce file size. Higher quality settings result in smaller size reduction, and repeated compression causes generational quality loss.
Compressed PNG meets web performance budget and email attachment size limit requirements. If the source file is already highly compressed, recompression may not reduce size and may even increase it.
FAQ about Compress PNG
Will image quality change after compression
Image quality does not change with lossless PNG compression. Lossy compression adjusts image quality based on the compression level. This tool's compression performs parameter adjustment based on the Sharp image processing engine.
When does compression have no effect
Already highly compressed PNG files cannot achieve effective size reduction when compressed again, and may even increase file size in some cases. Recompression is not recommended for such files.
What is the single file size limit
The maximum single file size supported by this tool is 50MB. Only one file can be processed per conversion. The service is free, output has no watermarks, and no account registration is required.
Will my files be stored
Conversion is completed server-side. Files are uploaded via HTTPS, and the server immediately deletes both source and output files after conversion completes. No files are stored.