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Check the encoding of your CSV files instantly with our free CSV Encoding Checker. Quickly detect whether your CSV file is encoded in UTF-8 or another common encoding, such as Windows-1252 or ISO-8859-1. Upload your CSV file and get clear encoding details in seconds — no installation, no uploads, and complete privacy.
What Is CSV Encoding?
CSV encoding defines how characters are stored in a file. Incorrect encoding can cause broken text, unreadable symbols, or import errors in Excel, databases, and web applications.
Why Check CSV Encoding?
You may need to check CSV encoding if:
- Special characters look broken
- Excel shows � symbols
- Database imports fail
- Non-English text is corrupted
- UTF-8 validation is required
How does this tool work?
- Upload your CSV file
- The tool analyzes raw file bytes
- Detects UTF-8 validity
- Shows encoding confidence and recommendations
Key Features
- Detects UTF-8 encoding reliably
- Identifies non-UTF-8 files
- Works fully in the browser
- Fast & lightweight
- Privacy-friendly
Secure & Privacy-Friendly
Your CSV file is never uploaded. All checks run locally in your browser.
Frequently Asked Questions:
How do I check if my CSV is UTF-8?
Upload your CSV file and click Check Encoding. The tool instantly analyzes the file’s byte structure and tells you the detected encoding, BOM status, and whether it is UTF-8 compatible.
What is a BOM in a CSV file?
A BOM (Byte Order Mark) is a hidden marker at the start of a file that tells software which encoding to use. UTF-8 BOM helps Excel open CSV files correctly without garbled characters.
What if my CSV is not UTF-8?
Use our CSV to UTF-8 Converter to convert it instantly. It supports Windows-1252, ISO-8859-1, Shift-JIS, GBK, and more.
Is my file uploaded to a server?
No. The entire encoding check happens in your browser using the FileReader API. Your file never leaves your device.