When this tool is useful
Compatibility workflows that specifically require PNG, or images that will receive non-lossy edits after conversion.
How local processing works
The browser decodes the JPEG and stores those existing pixels in a PNG. Future PNG saves can be lossless, but prior JPEG damage remains.
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
The PNG is usually larger and does not become sharper or gain real transparency simply by changing formats.
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?
The PNG is usually larger and does not become sharper or gain real transparency simply by changing formats.