Encoding & Crypto — Guides & Articles

• Get a SHA-1 Hash of a File Without Opening CMD

  Published 2026-10-12

  A SHA-1 file hash is exactly 40 hex characters or 28 Base64 characters. Use the Sha1 Hash Generator in your browser when you can't run certutil locally.

  

• RSA Key Generator Alternative for RSA-OAEP Encryption

  Published 2026-10-12

  Need an RSA key generator alternative that runs locally? Generate RSA-OAEP key pairs with SHA-256 and export standard SPKI and PKCS#8 PEM in your browser,…

  

• Simplify Using a ROT47 Encoder Decoder in 3 Steps

  Published 2026-10-12

  Cut the ROT47 process down to three repeatable actions. This guide shows how a self-inverse ROT47 Encoder Decoder simplifies printable-ASCII encoding and…

  

• ROT13 Decoder for Beginners: A Plain-English Walkthrough

  Published 2026-10-12

  Beginner's guide to ROT13 decoding: how the 13-letter alphabet shift works, what stays unchanged, and step-by-step use of a browser-based decoder tool.

  

• HMAC Generator Example: A Real HMAC-SHA256 Walkthrough

  Published 2026-10-12

  See a worked HMAC generator example with SHA-256 inputs, hex and Base64 output, and the rules that keep two systems in byte-exact agreement.

  

• Rail Fence Cipher Decoder Free, No Sign Up, No Upload

  Published 2026-10-12

  Decode Rail Fence ciphertext locally in your browser — no sign up, no upload, full Unicode preserved. Set rails from 2 to 100, paste text, copy the result.

  

• Looking for a Password Strength Checker Alternative?

  Published 2026-10-11

  A local password strength checker alternative that gives length and pattern feedback without uploading your secret, with NIST-aligned limits.

  

• Password Generator Cheat Sheet: Length, Entropy, and Settings

  Published 2026-10-11

  Password generator cheat sheet: entropy formula, character pools, and length thresholds for a strong random password locally in any browser.

  

• HTML Escape on iPhone: Use Safari to Encode

  Published 2026-10-11

  Open the HTML Entity Encoder / Decoder in iPhone Safari to escape reserved HTML characters without installing an app — local encoding and decoding support.

  

• Hill Cipher Decoder Free No Sign Up: Decode in Your Browser

  Published 2026-10-11

  Decode or encrypt Hill cipher text in your browser with no sign up, no fees, and no server uploads. Type a 2x2 key matrix and A-Z text; get normalized A-Z…