The pocket knife for developers.

Live Paste /paste Copy and paste between your phone and computer. Pair with a QR code, end-to-end encrypted, gone in 5 minutes to a day. Live Meet /meet Free one-to-one video calls. Send a link, talk: no account, no app, no time limit, peer to peer and encrypted. Live JSON /json Validate, beautify and minify JSON. Exact error lines with a plain-English fix. Nothing leaves your browser. Live Base64 /base64 Encode and decode Base64 as you type. UTF-8, URL-safe, files, images and data URIs. Live JWT /jwt Decode, verify and create JSON Web Tokens. HS, RS, PS, ES and EdDSA. Tokens never leave your browser. Live UUID /uuid Generate v4, v7, ULID, v1 and v5 in bulk. Decode any UUID to see its version and creation time. Live Timestamp /timestamp Unix epoch to date and back. Seconds, ms, µs or ns, detected for you. Any time zone, DST-aware. Live Regex /regex Test JavaScript regular expressions with live highlighting, groups, flags and replace. Runaway patterns are stopped. Live Password /password Strong random passwords, EFF passphrases and PINs, with entropy and crack time. Never sent or stored. Live Hash /hash MD5, SHA-1, SHA-256, SHA-512 and CRC-32 of text or files, HMAC with a key, checksum verification. Live bcrypt /bcrypt Hash a password with bcrypt, verify one against a $2a$/$2b$/$2y$ hash, see cost and salt. Live URL encode /url Percent-encode and decode text four ways, catch double encoding, and split a URL into parts and query parameters. Live Case converter /case camelCase, PascalCase, snake_case, CONSTANT_CASE, kebab-case and more, for one name or a whole list. Live YAML ↔ JSON /yaml Convert YAML to JSON and back as you type, with line and column errors and Norway-safe quoting. Live Cron /cron Explain a cron expression in plain English and see its next 10 run times, local or UTC. Live Diff /diff Compare two texts or files side by side, with changed words highlighted and a git-style patch. Live CSV ↔ JSON /csv Convert CSV to JSON and back, with delimiter detection, nested JSON flattening and a table preview. Live JSON to types /json-to-types Turn sample JSON into TypeScript interfaces, Zod schemas, Go structs, Rust serde structs or Pydantic models. Live Color /color Convert HEX, RGB, HSL and OKLCH, check WCAG contrast and get a 50 to 950 shade scale. Live QR code /qr Make static QR codes for links, Wi-Fi, contacts, email and SMS. PNG or SVG, no tracking, never expires. Live Number base /number-base Binary, octal, decimal and hex with exact big numbers, two's complement and IEEE 754 floats. Live Subnet calculator /subnet IPv4 and IPv6 CIDR: netmask, host range and count, splitting and range to CIDR. Live SQL formatter /sql Format or minify SQL for PostgreSQL, MySQL, SQL Server, Oracle, BigQuery and more. Live HTML entities /html-entities Escape text for HTML, or decode any named or numeric entity back to text. Live chmod calculator /chmod Unix permissions both ways: 755, rwxr-xr-x and u+x, with special bits and umask. Live Markdown preview /markdown Live Markdown editor with a GitHub-style preview. Export clean HTML. Live curl to code /curl Paste a curl command, get Python, JavaScript fetch, Go or PHP. Live XML formatter /xml Pretty-print, minify and validate XML, or convert it to JSON. Live HTTP status codes /http-status Every HTTP status code in plain English, with what to do about it. Searchable. Live String escape /escape Escape and unescape strings for JSON, JavaScript, Java, Kotlin, C#, Python, Go, C, SQL, bash, regex and CSV.