Encoding & Crypto — Guides & Articles

• Create an RSA Key in Your Browser Without ssh-keygen

  Published 2026-09-07

  Create an RSA key in your browser without ssh-keygen. RSA Key Generator outputs 2048- or 3072-bit RSA-OAEP key pairs with SHA-256 and SPKI/PKCS#8 PEM.

  

• How to Document the Steps to Use a ROT47 Encoder Decoder

  Published 2026-09-07

  Document each ROT47 procedure step: input text, the single Apply action, rotated output, preserved spaces and tabs, and non-ASCII characters.

  

• ROT13 Decoder Cheat Sheet: ASCII Mapping and How to Use It

  Published 2026-09-07

  ROT13 decoder cheat sheet with full ASCII letter mappings, quick letter-pair examples, and a browser tool that applies ROT13 twice to recover the source.

  

• Hill Cipher Decoder Bulk: Process Many Lines in One Pass

  Published 2026-09-07

  Process bulk Hill cipher messages with the Hill Cipher Decoder. Handles up to 100,000 letters in A-Z form using a 2x2 matrix, modulo-26, in your browser.

  

• Rail Fence Cipher Decoder Bulk: Long Pastes, Full Unicode

  Published 2026-09-07

  Decode Rail Fence cipher in bulk. Process up to 200,000 Unicode code points in a single run, keeping every space, line break and emoji in the exact output.

  

• PHP Convert to Punycode: A Quick Browser-Based Path

  Published 2026-09-07

  Need to PHP convert to Punycode for an IDN domain? Use the browser-based RFC 3492 converter to verify Unicode and xn-- labels in both directions.

  

• How to Test Password Strength Without Uploading It

  Published 2026-09-07

  Run a private password strength test in your browser. Get NIST-aligned feedback on length, character groups and patterns, with nothing uploaded or stored.

  

• Make a Password to PDF: Generate and Apply It Locally

  Published 2026-09-06

  Make a password to PDF by generating a cryptographically random string in your browser, then applying it to lock the document locally — no uploads required.

  

• A Morse Code Translator Alternative Built on ITU M.1677-1

  Published 2026-09-06

  Looking for a Morse code translator alternative? This free browser tool follows ITU-R M.1677-1, plays audio, needs no signup, and runs entirely locally.

  

• HMAC Calculator: Match the Protocol's Exact Bytes

  Published 2026-09-06

  Use an HMAC calculator for API signing and webhook verification. Match the SHA variant, key encoding, and output format to the protocol's exact bytes.