What Compress PNG does
Re-encode PNG pixels locally and compare the resulting file size and appearance. The tool keeps the operation focused and creates a separate result so the original remains available for comparison.
Compress PNG processes the supplied input in the browser unless its interface explicitly identifies a browser-managed service.
How to use Compress PNG
Set up Compress PNG around the final use case rather than an arbitrary maximum. Test the workflow on non-critical material before processing an important source.
- Select a source image and inspect its format, pixel dimensions, orientation, and transparency before making changes.
- Choose the crop, size, format, quality, color, metadata, or visual setting required by the destination.
- Use the preview at both fit-to-screen and full-size views to check edges, text, color, and artifacts.
- Download the result, reopen it independently, and confirm its pixel dimensions, format, transparency, and file size.
Where Compress PNG fits
Use this image workflow for a specific delivery requirement such as a crop, size, format, visual treatment, or metadata check. Judge the result at its actual display size as well as at 100% zoom, and retain the source image for later exports.
What to check
Open the compressed image at 100% and inspect gradients, edges, small text, and transparency. Exact target size may require both quality and dimension changes.
Check pixel dimensions, crop boundaries, transparency, small text, color, and the downloaded format at 100% zoom. Re-encoding may intentionally remove metadata and can change compression artifacts.
Privacy and limitations
Image pixels are processed in the browser and are not uploaded by these tools.
The tool re-encodes decoded pixels as PNG. It has no resize, palette, color-count, or loss-level control, so a source that is already efficient may shrink very little or become larger.