Optimize · Browser-first processing
Use this for screenshots and graphics where you want a clean PNG reconstruction rather than lossy quality reduction.
Select a supported file or enter the requested values, then run the tool.
This browser tool does not upload the selected source to ImgNimble. Closing or refreshing clears the selected files and generated result from the page.
Common questions
Lossless PNG Optimizer reads the selected input into browser memory and performs its documented operation on this device. It does not submit the source file to ImgNimble while using this browser-first workspace.
A freshly encoded PNG with the same canvas dimensions and pixel colours.
Colour-management chunks and metadata may be removed. Pixel values are preserved after browser decoding, but the binary file will not match byte-for-byte.
Lossless PNG Optimizer validates the selected file before processing. Use JPG, JPEG, PNG, WEBP, GIF, HEIC, HEIF, SVG within the 40 MB per-file limit. Keep an untouched original for comparison.
The Lossless PNG Optimizer workflow runs in browser memory. ImgNimble does not receive the source file for this local operation; refreshing or closing the page clears the selected input and generated in-page result.
Practical checks
Use this for screenshots and graphics where you want a clean PNG reconstruction rather than lossy quality reduction.
Keep the source, download the Lossless PNG Optimizer result as a new file, and verify dimensions, transparency, colour, metadata and visual detail before replacing any production asset.