Encoding & Crypto — Guides & Articles

• AES Encryption Online Free: Encrypt Text in Your Browser

  Published 2026-08-06

  Encrypt text online free with AES-256-GCM into a portable authenticated JSON package and decrypt it locally in your browser with the same password.

  

• Char Code Lookup API Alternative That Runs Locally

  Published 2026-08-06

  Skip the remote char code lookup API. Convert text to Unicode code points and decode U+XXXX or \u{...} tokens entirely in your browser, no upload or key.

  

• Is Text to Hex Safe to Use Online? A Privacy Guide

  Published 2026-08-06

  Is converting text to hex safe online? Hex is lossless UTF-8 display, so safety depends on whether the encoder uploads your input. Here is what to check…

  

• Describe How to Convert Text to Binary Numbers Step by Step

  Published 2026-08-04

  Describe how to convert text to binary numbers with a tool that encodes each UTF-8 byte as exactly eight zero-padded bits. Real byte counts, fatal error…

  

• Hide Text in Text: A Zero-Width Unicode Method

  Published 2026-08-04

  Hide text in text by inserting zero-width Unicode characters into a cover sentence, then reveal the UTF-8 payload locally in your browser without uploading…

  

• How to Calculate a SHA-512 Hash on a Linux System

  Published 2026-08-04

  Compute a SHA-512 hash on Linux with sha512sum or in your browser. Understand the 128-character output, file checks, and where raw SHA-512 falls short.

  

• Generate a SHA-256 Hash in Java: Code and Browser Method

  Published 2026-08-04

  Generate a SHA-256 hash in Java with MessageDigest, then verify the 64-character Hex or Base64 digest using a browser-based generator that runs locally.

  

• How to Calculate a SHA-1 Hash From Text or a File

  Published 2026-08-04

  Calculate a SHA-1 hash from UTF-8 text or a file up to 100 MB in your browser. Get the 160-bit digest as 40-character Hex or 28-character Base64.

  

• How to Generate an RSA Key for a Cisco Switch

  Published 2026-08-04

  Cisco switches can generate RSA keys natively with crypto key generate rsa, or offline in your browser. See the IOS commands, PEM exports, and 2048 vs 3072…

  

• Does ROT47 Need a Separate Decoder? It's Self-Inverse

  Published 2026-08-03

  No, ROT47 does not need a separate decoder. Its 47-position rotation over 94 printable ASCII characters is self-inverse, so the same operation handles both…