UTF-8 Validator

Validate text and files for UTF-8 encoding compliance with detailed byte analysis and error detection

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About This Tool

The UTF-8 Validator is a comprehensive online tool that checks whether text or files comply with UTF-8 encoding standards. It validates byte sequences, detects invalid UTF-8 characters, analyzes encoding patterns, and provides detailed reports on validation results. The tool supports both direct text input and file uploads (TXT, HTML, XML, JSON, CSV), with options for strict validation, BOM detection, and character statistics. Perfect for developers, content creators, and data analysts working with international text and Unicode data.

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How to Use

Enter text directly in the text area OR click the upload area to select a file
Choose validation options: Strict mode (rejects overlong sequences) and BOM detection
Click 'Validate UTF-8' button to analyze the content
View detailed results including validation status, byte analysis, error positions, and character statistics
Download validation report as JSON if needed

Frequently Asked Questions

Find Quick Answers

What is UTF-8 validation?

UTF-8 validation checks whether byte sequences follow the UTF-8 encoding standard defined by Unicode. It verifies that multi-byte sequences are properly formed and detects invalid byte patterns that don't conform to UTF-8 rules.

What types of files can I validate?

You can validate any text-based files including TXT, HTML, XML, JSON, CSV, and source code files. The tool reads files as UTF-8 encoded text and validates the byte sequences. Binary files will show encoding errors.

What does 'strict validation' mean?

Strict validation rejects overlong UTF-8 sequences (where characters are encoded using more bytes than necessary) and other non-canonical forms. This provides stricter compliance checking beyond basic UTF-8 validation.

What is a BOM (Byte Order Mark)?

A BOM is a special Unicode character (U+FEFF) sometimes placed at the beginning of UTF-8 files to indicate encoding. Our tool can detect and report if a BOM is present, though UTF-8 doesn't require it.

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