How to Convert PGM to WebP

PGM's uncompressed storage makes even modest grayscale research output far larger than necessary, while WebP, built by Google specifically for fast-loading websites, supports both lossy and lossless compression in one format. Converting PGM output to WebP can shrink file sizes dramatically, with lossless mode preserving exact grayscale values and lossy mode shrinking files much further if some compression is acceptable.

This conversion is useful when publishing visualization results, research figures, or processed grayscale images on a website or in documentation, where PGM's lack of browser support would otherwise be a problem.

1. Install Batchify Image Converter and Resizer Pro on your Windows PC.
2. Open the app and select Batch Mode for multiple files, or Individual Mode for a single PGM.
3. Drag your PGM file or folder into the app window, enabling recursive folder scanning if needed.
4. Set the "From" format to PGM and the "To" format to WebP.
5. Choose lossless mode to preserve exact quality, or lossy mode for smaller files.
6. Click Convert. WebP files are written to the output folder, fully offline.

• 100% offline — your research and pipeline output is never uploaded anywhere
• Dramatic file size reduction compared to uncompressed PGM
• Choice of lossless or lossy output depending on your quality needs
• Bulk conversion of entire folders, including sub-folders, in one click
• Multi-core processing for fast handling of large batches
• Option to delete original PGM files automatically after conversion