UTF-8 Validator

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

Request Feature / Support

14,916+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

AI Web Tool Generator

Build Your Own Custom Web Calculator in Seconds

Type what tool or calculator you need below. Our AI will build it instantly for your site.

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.

Save your calculation history with a free account

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.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

Related Tools

Other useful calculators and utilities you might like

Spotify to MP3 Converter

Convert Spotify tracks and playlists to MP3 format instantly with our free online converter.

Road Distance Calculator

Calculate the driving distance and travel time between two addresses with our free online road dista...

Age Calculator

Calculate your exact age in years, months, and days from any birth date to any target date.

Currency Converter

Convert currencies instantly with real-time exchange rates and historical data support.

Your Feedback Matters

Help Us to Improve