Encoding & Crypto — Guides & Articles

• Text Steganography Alternative Using Zero-Width Bits

  Published 2026-08-11

  A text steganography alternative that hides a short UTF-8 message inside visible cover text using zero-width Unicode characters, runs in your browser, and…

  

• How to Create SHA-512 Hashes From Text or Files

  Published 2026-08-11

  Generate a 128-character SHA-512 digest from UTF-8 text or a file locally. Copy Hex or Base64 output, verify against trusted references, avoid pitfalls.

  

• Generate a SHA-256 Hash in JavaScript: Web Crypto and Tool

  Published 2026-08-11

  Generate a SHA-256 hash in JavaScript using the Web Crypto API or a local browser tool, with exact UTF-8 byte handling and FIPS 180-4 verification.

  

• How to Get the SHA-1 Hash of a Certificate File

  Published 2026-08-11

  Get the SHA-1 fingerprint of any certificate file in your browser. Step-by-step for X.509 certs, Android keystores, and legacy checksums.

  

• How to Generate a Password in Google Password Manager

  Published 2026-08-10

  How to generate a password in Google Password Manager with full control over length, characters, and entropy. Step-by-step local generator method.

  

• Avoid Mistakes When Using a ROT47 Encoder Decoder

  Published 2026-08-10

  Practical ways to avoid mistakes with a ROT47 encoder decoder: keep non-ASCII untouched, escape punctuation for downstream systems, and rely on one button…

  

• How to Decrypt a Hill Cipher: A Worked Example

  Published 2026-08-10

  Walk through Hill cipher decryption with a concrete example. See how the 2x2 key 3 3; 2 5 turns HIAT back into HELP, and how to use the decoder tool.

  

• ROT Cipher Decoder: Reverse ROT13 Text Online

  Published 2026-08-10

  A ROT cipher decoder applies reversible ROT13 to ASCII letters in your browser. Paste text, click apply, and copy the result with nothing uploaded.

  

• How to Decipher a Rail Fence Cipher: Match the Convention

  Published 2026-08-09

  Decipher a Rail Fence cipher by matching the sender's convention, choosing the right rail count, and reversing the zigzag in your browser.

  

• Convert an IDN Domain to Punycode: Label-by-Label Steps

  Published 2026-08-09

  Convert an IDN domain to Punycode label by label in your browser. See which label gets xn--, validate round-trip, and learn what raw RFC 3492 does not do.