Encoding & Crypto — Guides & Articles

• ROT13 Decoder Online: A CyberChef-Style Browser Tool

  Published 2026-09-24

  Apply and reverse ROT13 in your browser with a focused online decoder. Paste text, see changed letters, copy output, no CyberChef recipe required.

  

• Rail Fence Cipher Decoder Example: 3-Rail Walk-Through

  Published 2026-09-24

  See a Rail Fence cipher decoder example with three rails, then four rails and a Unicode message. Run the Rail Fence Cipher Decoder locally in your browser.

  

• Punycode Converter Bulk: Process Multi-Label IDN Domains

  Published 2026-09-24

  Convert multi-label IDN domains in bulk with a browser-side Punycode converter. RFC 3492 label conversion runs locally with no remote API calls.

  

• Check Password Complexity in Linux With a Local Audit

  Published 2026-09-24

  Evaluate password complexity in Linux locally using a NIST-aligned 5-level audit that flags repeated and sequential patterns without uploading your secret.

  

• Password Generator Alternative That Runs in Your Browser

  Published 2026-09-23

  Looking for a password generator alternative? This free browser tool uses a CSPRNG, never uploads data, and lets you control length and character types.

  

• Morse Code Translator by Sound: Hear Dots and Dashes

  Published 2026-09-23

  Free Morse code translator by sound. Hear accurate 600 Hz dit-and-dah tones using ITU-R M.1677-1 timing — fully local, no signup.

  

• HMAC Generator Bulk: Compute Many HMAC Tags Locally

  Published 2026-09-23

  Generate HMAC tags in bulk with HMAC Generator — full SHA-256, SHA-384, and SHA-512 outputs for large UTF-8 and hex payloads, computed entirely in your browser.

  

• Hill Cipher Decoder Example: HELP to HIAT in 3 Steps

  Published 2026-09-23

  Worked hill cipher decoder example: HELP to HIAT under default key 3 3; 2 5, plus padding and invertible-matrix scenarios explained in plain terms.

  

• Convert Hex to Text PowerShell: Safe UTF-8 Methods

  Published 2026-09-23

  Convert hexadecimal strings to readable UTF-8 text using PowerShell commands or a local browser-based Hex to Text converter with strict validation.

  

• Gzcompress Online on iPhone: Run It in Safari

  Published 2026-09-23

  Run gzcompress online on iPhone directly in Safari. Compress UTF-8 text to Base64-wrapped gzip or restore a gzip Base64 string back to text — no app required.