Encoding & Crypto — Guides & Articles

• Generate an HMAC-SHA256 Tag With Your Secret Key

  Published 2026-09-01

  Generate an HMAC-SHA256 tag from a secret key and message in your browser. Produce the full 32-byte tag as hex or Base64 with byte-exact input handling.

  

• Hill Cipher Decoder API Alternative: Decode Locally

  Published 2026-09-01

  A Hill cipher decoder API alternative that runs in your browser. Encrypt or decrypt 2x2 matrix pairs under mod 26 with no API key and no upload.

  

• Convert Hex to Text: Read Hex Strings as UTF-8 Bytes

  Published 2026-09-01

  Convert hex to text by pasting continuous, spaced, or 0xNN hexadecimal into a browser tool that decodes UTF-8 strictly and reports every invalid byte.

  

• Gzcompress Online for Beginners: UTF-8 to Gzip Base64

  Published 2026-08-31

  Compress UTF-8 text to gzip and Base64 online in your browser. A plain-English beginner guide to RFC 1952 framing, round-trip safety, and common pitfalls.

  

• Convert a File to Base64: A Practical Encoding Guide

  Published 2026-08-31

  Convert a file to Base64 encoding locally in your browser up to 10 MB. Learn how canonical RFC 4648 Base64 works, when to use it, and how to avoid common…

  

• Base64 to Hex: Command Line vs Online Tool Compared

  Published 2026-08-31

  Compare command-line pipelines (xxd, base64, OpenSSL) and the browser-based Base64 to Hex Converter for byte-exact RFC 4648 conversions.

  

• Base64 Decode for Beginners: A Plain-English Guide

  Published 2026-08-29

  Decode Base64 strings safely and instantly in your browser. This beginner-friendly guide explains how Base64 works, how to decode it, and why padding matters.

  

• Base32 Decode Cheat Sheet: Alphabet, Padding, Errors

  Published 2026-08-28

  A Base32 decode cheat sheet covering the A–Z and 2–7 alphabet, padding rules, length checks, named validation errors, and a three-step decoding workflow.

  

• Base100 Encode for Beginners: A Plain-English Starter Guide

  Published 2026-08-28

  New to Base100? Learn what this emoji-byte encoding is, how each UTF-8 byte maps to one symbol, and how to encode or decode text safely in your browser.

  

• AES Encryption Online Explained: AES-256-GCM in the Browser

  Published 2026-08-28

  AES encryption online explained: how AES-256-GCM with PBKDF2-SHA-256 turns a password into a portable JSON package, plus the exact steps to encrypt and…