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Developer utilities that get out of your way
Case change, trim, replace and more
Format, validate, transform JSON data
Generate hashes, HMAC, and verify checksums
Base64, URL, HTML, Hex, Unicode, JWT, Morse, and more
Generate UUID v4, v7, ULID, and NanoID
Test patterns, view matches, and extract capture groups
Decode, verify (HMAC/RSA/ECDSA), and generate JWTs
Convert between Unix timestamps, ISO 8601, and human dates
Compare texts with line, word, or character-level diffs
Convert colors, check WCAG contrast, and explore palettes & harmonies
Cryptographically secure passwords and passphrases
Convert between JSON, YAML, TOML, XML, CSV, and JSONL with flatten, query, and format options
Split, transform, and rejoin lists — quoting, sorting, dedupe, and code-ready output presets
Live HTML, CSS, and JS editor with an instant sandboxed preview
Explain cron schedules in plain English and preview upcoming run times
Generate a QR code from text, or decode one from an image
Write Markdown with a live, sanitized preview — export as .md or .html
Generate placeholder text and mock data records as a table, JSON, or CSV
Turn a curl command into fetch, axios, Python requests, or PHP cURL code