How Lossless PNG Compression Works
PNG optimization can remove redundant data without changing decoded pixels.
PNG optimization can remove redundant data without changing decoded pixels. This guide explains the practical choices before using png.now.
What the conversion changes
Conversion translates the source into a different storage and presentation model. Pay particular attention to palette choice, metadata, bit depth, transparency, and visual identity. Keep the original PNG file as the editable or authoritative copy.
Recommended workflow
- Open the COMPRESS PNG converter.
- Upload a valid source file and wait for it to finish transferring.
- Run the conversion and download the result.
- Open the new file in its intended application and compare it with the source.
Quality checklist
Check transparency, color profiles, bit depth, dimensions, sharp edges, animation, metadata, and output compression after conversion.
Test a representative file before processing a larger batch. If exact editability matters, retain both the source and converted result.
Privacy and reliability
png.now uses HTTPS uploads and automatic retention controls. Do not upload a damaged or incorrectly named file; a filename extension alone does not repair its internal structure.
Common questions
Will conversion preserve everything?
Supported content is preserved where the destination has an equivalent. Features without a direct equivalent can be flattened, omitted, or represented differently.
Should I delete the original?
No. Keep the source until you have inspected the output and confirmed it meets the intended workflow.