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Developer

JSON, JWT, regex, hashes, cURL and more. 60 free tools that run 100% in your browser.

• JSON Formatter: Prettify, validate, minify and explore JSON as a tree.
• JWT Decoder: Decode JWT headers/payloads and check expiry locally.
• Hash Generator: MD5, SHA-1, SHA-256, SHA-512 for text and files.
• UUID Generator: Generate v4 and v7 UUIDs in bulk.
• Password Generator: Strong random passwords and passphrases with strength meter.
• QR Code Generator: QR codes for links, Wi-Fi, vCards and text with colors and logo.
• QR Code Scanner: Scan QR codes from your camera or an image.
• Barcode Generator: CODE128, EAN-13, UPC, CODE39 and more as PNG/SVG.
• Regex Tester: Test regular expressions with live highlighting and groups.
• Regex Builder: Build regular expressions from plain-language blocks.
• Base64 Encode/Decode: Encode or decode Base64 text and files.
• URL Encode/Decode: Encode/decode URLs and parse query strings.
• cURL to Code: Convert cURL to JavaScript, Python, Go, Rust, PHP, Java and more.
• Timestamp Converter: Unix epoch ⇄ human dates across time zones.
• Cron Explainer: Explain cron expressions and preview next run times.
• YAML ⇄ JSON: Convert between YAML and JSON with validation.
• SQL Formatter: Beautify SQL for many dialects.
• ERD Studio: Design database schemas and export SQL, Prisma and Drizzle.
• HTML Entities: Escape and unescape HTML entities.
• Number Base Converter: Binary, octal, decimal and hex conversion.
• JSON to Types: Generate TypeScript, Zod, Go, Rust, Python, Java, C#, Swift, Kotlin, Dart, C++, PHP, Ruby, Elm types or JSON Schema from JSON.
• Bcrypt / Argon2 / Scrypt Hasher: Hash and verify passwords with Argon2id, bcrypt, scrypt and PBKDF2.
• Encrypt / Decrypt Text & Files: Password-protect text or any file with AES-256-GCM, ChaCha20-Poly1305 or OpenSSL-compatible AES.
• PGP Encrypt / Sign / Keys: Generate PGP keys, encrypt and decrypt messages or files, sign and verify, and inspect keys.
• RSA / ECDSA / SSH Key Generator: Generate Ed25519, ECDSA and RSA key pairs as OpenSSH, PEM and JWK.
• Certificate / CSR / PEM Decoder: Decode X.509 certificates, CSRs, CRLs and any ASN.1 structure from PEM or DER.
• TOTP / HOTP Generator: Generate and check 2FA codes, and make QR codes for authenticator apps.
• BIP39 Mnemonic Generator: Generate and validate BIP39 seed phrases offline, in 10 languages, with the derived seed.
• Classic Ciphers & Codes: Caesar, ROT13, ROT47, Vigenère, Atbash, Affine, Morse, Bacon, rail fence, XOR, NATO, Braille and more.
• Encoding Toolbox (Recipe Chains): Chain encodings: Base64, hex, Base32/58/62/85, gzip, URL, punycode, quoted-printable, MessagePack, protobuf and more.
• String Escape / Unescape: Escape or unescape text for JSON, JavaScript, Java, C#, Python, C, Go, SQL, CSV, regex, shell and HTML.
• IP Subnet Calculator: IPv4 and IPv6 CIDR calculator, subnet splitter, range to CIDR and ULA generator.
• MAC Address Lookup & Generator: Find the vendor of a MAC address offline, convert formats and generate random MACs.
• Device & User-Agent Info: See your browser, OS, screen, GPU and supported features, or parse any user-agent string.
• Meta / Open Graph Tag Generator: Write SEO, Open Graph and X card tags with live search and social previews.
• HTTP Status Codes: Searchable list of HTTP status codes with plain meanings and when to use each.
• MIME Type Lookup: Find the MIME type for a file extension, or the extensions for a MIME type.
• Keycode Info: Press any key to see event.key, event.code, keyCode, location and modifiers.
• Basic Auth Header Generator: Build or decode HTTP Authorization: Basic headers, with curl and fetch examples.
• HTML WYSIWYG Editor: Write rich text like a word processor and get clean HTML you can copy or download.
• docker run to Compose: Turn one or more docker run commands into a docker compose YAML file.
• chmod Calculator: Convert Unix permissions between checkboxes, octal (755) and symbolic (rwxr-xr-x).
• Phone Number Parser: Parse, validate and format international phone numbers, in bulk or found inside text.
• IBAN & BIC Validator: Validate and parse IBAN and BIC/SWIFT codes offline, one at a time or in bulk.
• File Type Identifier: Find out what a file really is from its magic bytes, with entropy and header view.
• Hex Viewer: View any file as hex and ASCII, search bytes, inspect values and extract strings.
• PO / MO / CSV Converter: Compile gettext PO to MO, decompile MO to PO, or move translations to CSV and Excel.
• Bulk File Renamer: Rename many files with patterns, numbering, find and replace and photo dates. Save as ZIP or rename in place.
• Git & Regex Cheat Sheets: Searchable cheat sheets for Git, regex, Markdown, Docker and the Linux shell.
• Hash & ID Analyzer: Guess the hash type (MD5, SHA, bcrypt, NTLM and more) and decode the time inside UUIDs, ULIDs, ObjectIds and Snowflake IDs.
• Dummy File Generator: Make test files of an exact size: random or zero bytes, text, CSV, JSON, and valid PDF, PNG, WAV and ZIP files.
• Secret Scanner: Scan files, a folder or a ZIP for API keys, tokens, passwords and private keys before you share or commit.
• Embedded File Extractor: Find and pull out pictures, PDFs, archives and audio hidden inside any file, like a lighter binwalk.
• Shamir Secret Sharing: Split a password or seed phrase into shares so any 3 of 5 (or any k of n) can rebuild it, with QR codes.
• DNS Lookup: Look up A, AAAA, MX, TXT, NS, CAA, SOA and more over DNS-over-HTTPS, or reverse an IP address.
• JSON Repair & JSON5: Fix broken JSON (missing quotes, trailing commas, comments, cut-off data) and convert JSON5 or JSONC to JSON.
• Password Strength Checker: See how fast a password could be guessed, which patterns give it away, and how to make it stronger, fully offline.
• .gitignore & LICENSE Generator: Build a .gitignore from 25 stacks and editors, and write a LICENSE file with your name and year.
• HAR File Viewer: Open browser network captures: waterfall, filters, headers, bodies, copy as cURL, and save a copy with secrets removed.
• Keyboard, Mouse, Gamepad & Touch Test: Check every key and key rollover, mouse buttons, double click and polling rate, controller sticks and multitouch.