Generators
Random data on demand
UUIDs, secure passwords, hashes, mock data, QR codes, Lorem Ipsum. Tuned for speed and shipping defaults that match real-world usage.
Meta Tag Generator
Generate title, description, Open Graph and Twitter card tags, with warnings for the mistakes that break social previews.
Barcode Generator
Make an EAN-13, EAN-8, UPC-A, ITF-14, Code 128, Code 39, Data Matrix, PDF417 or Aztec code. Check digits verified before encoding; SVG and PNG download. Runs in your browser.
UUID Generator
Generate UUIDs v4, v7, and v1 in the browser. Sortable v7 recommended for database keys.
Hash Generator (MD5, SHA-1/256/384/512)
Compute MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes of text or files. Hex or Base64 output. Browser-only.
Password Generator
Generate strong passwords with crypto-grade randomness. Length, charsets, ambiguous-char filter. Browser-only.
Mock Data Generator
Generate realistic mock data (users, emails, addresses, dates) as JSON, CSV, or SQL. 7 locales.
QR Code Generator
Generate QR codes for text, URLs, vCard, Wi-Fi, or email — PNG and SVG download, error correction levels, color customization. 100% local.
Lorem Ipsum Generator
Generate placeholder text — classic Lorem Ipsum, Vietnamese filler, Spanish, or hipster style. Words, sentences, paragraphs, or HTML.
Bcrypt Hash Generator & Checker
Hash passwords with bcrypt (choose cost rounds 4–15) and verify a password against an existing hash — everything runs in your browser, nothing is sent anywhere.
TOTP Code Generator (2FA)
Generate RFC 6238 TOTP two-factor codes from a base32 secret — live countdown, QR code and otpauth:// URI for authenticator apps. Secrets never leave your browser.
RSA Key Pair Generator
Generate an RSA (2048/3072/4096-bit) or Ed25519 key pair as PEM, right in your browser. Nothing is uploaded, and the private key never leaves the tab.
HMAC Generator & Verifier
Compute an HMAC (SHA-1/256/384/512) with a text or hex key, hex or Base64 output, and verify a signature in constant time. Browser-only.
Choosing between these tools
Generated values are only as good as the source of randomness behind them. The password and UUID generators here draw from the browser's cryptographic random source rather than Math.random, which matters the moment a value is used for anything a stranger might try to guess.
Match the tool to the threat. A password generator is for values a human stores in a manager; the bcrypt tool is for values a server stores, because it deliberately makes each check slow. The hash generator covers MD5 and the SHA family, which are fast by design and therefore right for checksums and wrong for passwords. TOTP produces the six-digit codes behind two-factor login, useful for confirming a shared secret was set up correctly.
Lorem Ipsum, mock data and QR codes are the everyday half of this set: filler text with the right paragraph shape, seed records with plausible names and dates, and a QR code you can size and error-correct before printing it. All generation runs in your browser — no value shown here is transmitted or logged.