Free Developer Tools

Create strong, random passwords with adjustable length, symbols, and pronounceable options. 100% offline.

Format, validate, minify, and convert JSON with syntax error highlighting and JSONPath query support.

Encode and decode Base64 strings, files, and images instantly with URL-safe and standard variants.

Percent-encode and decode URLs, query parameters, and components for safe links and API requests.

Decode JWT tokens free in your browser. See header, payload, and signature, plus verify HS256/HS384/HS512 signatures with a shared secret.

Generate v1, v4, or v7 UUIDs free in your browser. Single or batches up to 1,000. Copy or download as .txt.

Test JavaScript regex patterns live in your browser. Live match highlighting, named + numbered capture groups, all standard flags.

Convert YAML to JSON or JSON to YAML free in your browser. Live preview, YAML 1.2 support, anchors and aliases handled.

Convert CSV to JSON free in your browser. Auto-detects separators (comma, semicolon, tab, pipe), handles quoted values, header toggle.

Build cron expressions visually, see plain-English description, and preview the next 5 fire times in your local timezone.

Pretty-print or minify HTML free in your browser. Embedded JS and CSS are formatted too. Configurable indent.

Format SQL queries free in your browser. Postgres, MySQL, BigQuery, Snowflake, Redshift, SQLite, T-SQL and more. Configurable indent and keyword case.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes of text or files free in your browser. WebCrypto-backed.

Convert between HEX, RGB, HSL, and the 147 named CSS colours. Live preview swatch and one-click copy.