Regex Tester
Test regular expressions against a string. See highlighted matches and capture groups. All processing runs in your browser.
Highlighted matches
Match groups
Example
Pattern: \d+, Input: Order123 → Matches: 123
Data Transformation Tools
JSON Formatter & Validator
Format, minify, and validate JSON with error messages and line numbers.
SQL Formatter
Beautify SQL with indentation and uppercase keywords.
CSV Header Validator
Detect duplicate or empty headers and column count issues.
Timestamp Converter
Unix timestamp to date, date to timestamp, timezone, current time.
Color Converter
Convert HEX, RGB, HSL. Color preview and copy.
JSON Diff Tool
Compare two JSON objects. See added, removed, changed.
Text Diff Checker
Compare two text blocks. Highlight additions and deletions.
JSON ↔ PHP Array Converter
Convert JSON to PHP array syntax and PHP array to JSON.
Lorem Ipsum Generator
Generate paragraphs, sentences, or words.
Case Converter
UPPERCASE, lowercase, camelCase, PascalCase, snake_case, kebab-case.
Text Statistics
Word count, character count, sentence count, reading time.
SQL Query Generator
Build SELECT with table, columns, WHERE, LIMIT.