Regex Tester / Find & Replace

Case Converter

Convert text or an identifier into every common naming style at once — camelCase, snake_case, kebab-case, and more. Recognizes word boundaries in camelCase/PascalCase, acronyms (XMLParser → XML + Parser), and around digits.

Text Diff

Compare two texts line by line — what was added, removed, or changed, with word-level highlighting inside changed lines.

Sort & Dedupe Lines

Sort lines of text alphabetically, remove duplicates, empty lines, and extra whitespace.

String Escape

Escape text into a string literal (quotes, backslash, control characters) for pasting into code, or unescape it back.

CRLF ↔ LF Converter

Convert line endings between Windows (CRLF), Unix/macOS (LF), and classic Mac (CR), with mixed-ending detection.

Character & Word Counter

Real-time text statistics: characters (with and without spaces), words, lines, sentences, paragraphs, and size in bytes (UTF-8).

JSON Schema Validator

Validate JSON data against a JSON Schema (draft-07 style) — with an exact path and explanation for every violation.

Age Calculator

Exact age from a birth date — years/months/days, total time lived, and the next birthday.

Credit Card Validator

Validate a card number with the Luhn algorithm, detect the payment network and length. Everything runs in the browser — the number is never sent anywhere.

JWT Encoder/Decoder

Encode and decode JWT tokens — header, payload, HMAC signing, and standard claims.

Query String ↔ JSON

Parse a URL query string into a JSON object, or build a query string back from JSON.

Bcrypt Hash + Verify

Hash passwords with bcrypt (random salt, adjustable cost) and verify a password against an existing bcrypt hash.