When this tool is useful
Website photos where modern browser support and reduced transfer size are more important than legacy compatibility.
How local processing works
The JPEG is decoded once and re-encoded as WebP. The comparison view helps judge whether the new file is actually smaller at acceptable quality.
How to use it
- Choose the source files.
- Review the available settings and page order.
- Process locally, inspect the result, and download it.
Important limitations
Re-encoding cannot restore detail already lost in the JPEG, and repeated lossy conversions can add artifacts.
Private by design
Your files stay in this browser. The tool does not upload the source or output to our servers.
Questions and answers
Does this tool upload my files?
No. Processing happens in your browser; closing the page clears the working session.
Will the output always match the source exactly?
Re-encoding cannot restore detail already lost in the JPEG, and repeated lossy conversions can add artifacts.