UTF-8 BOM Remover and Byte Order Mark Detector
Detect and remove byte order marks instantly with this free UTF-8 BOM remover. Clean corrupt text files directly in your browser with zero data uploads.
About BOM Detector/Remover
A Byte Order Mark (BOM) can introduce hidden parsing errors, broken scripts, and unexpected characters in web applications and data processing pipelines. The BOM Detector/Remover inspects text snippets and uploaded files to identify whether UTF-8, UTF-16, or UTF-32 signature bytes are present.
When a signature is found, you can strip it with one click and export clean, standard plain text. Because all processing executes locally in your browser, your source code and proprietary data never leave your device.
Key features
- Detects UTF-8, UTF-16, and UTF-32 signature bytes
- Removes invisible byte order marks with one click
- Accepts direct text input or file uploads
- Displays raw hex representations of file headers
- Runs entirely in the browser for complete privacy
- Exports sanitized files with standard UTF-8 formatting
How to use BOM Detector/Remover
- Paste your raw text into the input field or upload a file.
- Review the detection status panel to see if a BOM is present.
- Inspect the identified encoding type and hex signature.
- Click the remove button to strip the leading byte mark.
- Copy the cleaned text or download the sanitized file.
Who is it for?
- Developers fixing unexpected output or header errors in PHP and Node.js
- Data engineers cleaning CSV and JSON files prior to database ingestion
- System administrators resolving cross-platform text issues between Windows and Unix
- Webmasters eliminating corrupt visual characters like  from published pages
Frequently asked questions
What is a Byte Order Mark (BOM)?
A Byte Order Mark is a small sequence of bytes at the start of a text stream used to signal endianness and encoding format. In UTF-8, it manifests as the byte sequence EF BB BF and is typically unnecessary.
Why does a UTF-8 BOM cause software errors?
Many compilers, interpreters, and data parsers do not expect leading signature bytes and interpret them as unexpected tokens. This often triggers JSON decoding errors, broken shell scripts, or HTTP headers-already-sent errors.
Does removing the BOM alter my text content?
No. Stripping the BOM only removes the hidden header bytes at the start of the file. Your actual text characters, formatting, and line breaks remain intact.
Is my data secure when using this tool?
Yes. The tool operates completely client-side within your browser. Your files and text entries are not sent to any external server.
Is this tool free to use?
Yes. The BOM detector and remover is free to use without any account registration or software installation.