Text Tools

Test regex, compare diffs, preview Markdown, and convert case formats.

All Tools JSON (7) Encoding (4) Generator (4) Security (2) Text (5) CSS (3) DevOps (1) Date & Time (1)
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Regex Tester

Test regular expressions with real-time matching and highlighting.

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Diff Checker

Compare two texts and see differences highlighted line by line.

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M↓

Markdown Preview

Write Markdown and see real-time rendered preview side by side.

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Aa

String Case Converter

Convert text between camelCase, PascalCase, snake_case, kebab-case, and more.

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SQL

SQL Formatter

Format and beautify SQL queries with dialect-specific formatting.

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About Text Tools

Text processing is at the heart of software development. These tools cover the most common text operations: regex pattern testing with real-time match highlighting and capture group display, side-by-side text comparison using the LCS diff algorithm, live Markdown preview with GitHub Flavored Markdown support (tables, task lists, fenced code blocks), and string case conversion between 8 formats (camelCase, PascalCase, snake_case, SCREAMING_SNAKE_CASE, kebab-case, Title Case, UPPERCASE, lowercase). All tools process text locally and never transmit your data.