Byte order mark editor
Inspect, add or remove a UTF byte order mark without changing the encoded payload.
Accepted files: see this tool’s format requirements. Choose one file. Up to 256 MiB in total.
One file up to 256 MiB. Adding a marker validates the selected UTF-8, UTF-16 or UTF-32 encoding. Removing a marker strips only a recognized leading marker. No encoding conversion is performed. Up to 1,000,000 characters. Review the settings before running.
Your result
How to use Byte order mark editor
- Choose the local file or files.
- Review the action and limits, then run the inspection.
- Check the result and download a separate output or report.
Useful next steps
Inspect the leading bytes
Choose a local file and inspect the detected marker. A missing marker does not identify the file encoding.
Add or remove explicitly
Choose the action. Adding validates the payload against the selected encoding; conflicting markers and invalid code units are rejected.
Keep the original
Download a new binary file. Every byte after the marker is preserved, and the source is never modified.