All Tools

Generate time-based one-time passwords for two-factor authentication from a Base32 secret. Supports SHA-1, SHA-256, SHA-512 with QR import and multi-account management.

Build a Content-Security-Policy header visually with a directive builder, preset templates, live security warnings, and output for Apache, Nginx, PHP, and more.

Decode and inspect PEM-encoded X.509 SSL/TLS certificates in your browser. View subject, issuer, validity, public key, fingerprints, and extensions.

Generate and verify HMAC authentication codes with 8 algorithms (SHA-256, SHA-512, SHA3, MD5, and more). Sign and check webhook and API signatures instantly.

Encrypt and decrypt text online with AES, DES, TripleDES, and RC4. Set a secret key and IV, choose Base64 or Hex output, and keep everything in your browser.

Check how strong your password is with a real-time score, entropy in bits, crack-time estimates, and actionable tips to improve it.

Generate secure random tokens in Hex, Base64, Base64URL, alphanumeric, and custom formats for API keys, session tokens, and secrets.

Generate Subresource Integrity hashes to verify that scripts and stylesheets loaded from a CDN haven't been tampered with.

Classify your soil by entering sand, silt, and clay percentages. Uses the USDA soil texture triangle to name the texture class and show its properties.

Operate a tower crane in your browser — rotate the boom, move the trolley, control the cable, and deliver crates to target zones across 5 levels.

Interactive virtual abacus with Japanese Soroban and Chinese Suanpan modes. Click beads, see real-time values, and practice with quiz challenges.

Run multiple countdown timers simultaneously. Create, name, and color-code timers for cooking, workouts, studying, or any timed activities.