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Detect and remove BOM signatures from UTF-8 files in one click. Fix parsing errors in PHP and optimize file compatibility.
Drag files here or click to upload
Max 5 MB
A BOM (Byte Order Mark) is a special marker at the start of a file (0xEF, 0xBB, 0xBF) used to indicate UTF-8 encoding.
While a BOM can help some Windows programs (such as Notepad), it is usually recommended to use no BOM in web development because:
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When your UTF-8 files trigger 'headers already sent' errors in PHP or Linux scripts, a BOM signature is often the culprit. This tool is specifically designed to detect and remove the Byte Order Mark (BOM) at the beginning of UTF-8 files, outputting a clean file. The BOM is a special byte sequence (such as EF BB BF) at the start of a UTF-8 encoded file used to identify the encoding, but it can cause program compatibility issues.
What file types are suitable for this tool?
It is primarily designed for UTF-8 encoded text files, such as source code files like .txt, .php, .js, and .css.
Will the file content change after removing the BOM?
No. The tool only deletes the BOM byte sequence (EF BB BF) at the beginning of the file. It does not modify any other content, ensuring semantic consistency.
Uploaded files must be UTF-8 encoded text files with a maximum size of 1GB. The results are strictly for BOM detection; corrupted files may affect accuracy. Processed files are automatically cleared from our servers, so please download them promptly.
We recommend developers use this tool to check for BOMs before saving PHP files to avoid redirection errors. For example, a .php file with a BOM can cause output anomalies, but it will run perfectly once the BOM is removed.
