PBM was designed for the simplest possible monochrome document transmission, while WebP was built by Google specifically for modern, fast-loading websites. Converting a bilevel PBM scan to WebP is useful when that document or pipeline output needs to display properly on a current website, since browsers widely support WebP but have no native support for PBM at all.
WebP's lossless mode preserves the exact bilevel image data without adding any color information that wasn't in the original source, since there's nothing in a PBM file beyond pure black-and-white pixels to begin with.
- Install Batchify Image Converter and Resizer Pro on your Windows PC.
- Open the app and select Batch Mode for multiple files, or Individual Mode for a single PBM.
- Drag your PBM file or folder into the app window, enabling recursive folder scanning if needed.
- Set the "From" format to PBM and the "To" format to WebP.
- Click Convert. WebP files are written to the output folder, fully offline.
- 100% offline — your document and pipeline output is never uploaded anywhere
- Bulk conversion of entire folders, including sub-folders, in one click
- Produces WebP files compatible with all current major browsers
- Multi-core processing for fast handling of large batches
- Option to delete original PBM files automatically after conversion
- No recurring subscription or hidden upload limits
Do browsers support PBM directly?
No, current browsers have no native PBM support, which is why converting to a widely supported format like WebP is necessary for displaying bilevel documents or scans online.
Will converting to WebP improve image quality?
No, the original PBM data only ever contained black-and-white pixels, so the converted WebP file displays the same content, just in a more web-friendly format.
Can I convert an entire folder of PBM files to WebP at once?
Yes, Batch Mode handles entire folders, including nested sub-folders, and scales conversion speed across multiple CPU cores.
Ready to convert your images offline, in bulk, with full privacy?