Developer Tools

Generate cryptographically strong passwords with adjustable length and character classes — never leaves your browser.

Grade any password on length, mixed case, numbers and symbols with instant visual feedback — nothing is sent anywhere.

Generate one or hundreds of RFC 4122 v4 UUIDs at once — perfect for testing, seeding and API design.

Generate SHA-1, SHA-256, SHA-384 or SHA-512 hashes for any text with the browser's WebCrypto API.

Decode and pretty-print the header and payload of any JSON Web Token — client-side only, signatures stay private.

Beautify or minify JSON with 2 / 4 / tab indent, syntax error hinting and one-click copy.

Turn any JSON array of objects into a clean CSV file with proper escaping — ready for spreadsheets or BI tools.

Test regular expressions against sample text with live match highlighting and flag support — g, i, m and more.

Convert between Unix timestamps, ISO 8601 and human-readable dates — perfect for API debugging and log analysis.

Write Markdown on the left and see the rendered HTML on the right, live — great for READMEs and docs.

Type any 5-field cron expression and get a plain-English description of when it will run.

Strip whitespace, comments and redundant characters from any CSS block — faster page loads with one paste.

Indent messy HTML with proper nesting and line breaks — the fastest way to read a minified template.

Paste Markdown and get clean HTML instantly — supports headings, lists, code blocks, links, bold and italics.

Convert between YAML and JSON with one click — great for Kubernetes, GitHub Actions and CI configs.

Turn CSV spreadsheets into JSON arrays or JSON into CSV rows with automatic column detection.

Pretty-print any SQL query with keyword uppercasing and clause-per-line indenting — easier to read and review.

Format and indent XML documents in the browser — great for SOAP, RSS and configuration files.

Instantly convert any integer between decimal, binary, octal, hexadecimal and base 36.

Break any URL down into protocol, host, path and query parameters — perfect for debugging UTM tracking.

Toggle Unix read/write/execute permissions and get the exact chmod octal + symbolic string — perfect for servers, SSH and CI scripts.

Paste a stack trace or error message and get a plain-English explanation of what broke, why it happened and the most likely fixes.

Percent-encode and decode URLs and query-string components. Supports encodeURIComponent and encodeURI modes. Handles Unicode, special characters and malformed sequences.

Encode and decode standard Base64 and URL-safe Base64URL (RFC 4648). Supports plain text and hex input. All processing stays in your browser — nothing is transmitted.