What This Category Is Best For

Pick encode and decode tools when the challenge is transport, compatibility, or representation rather than wording. They are most useful in technical and data-handling workflows.

- developers debugging payloads
- marketers cleaning tracking URLs
- teams handling encoded text safely

Common Tasks

Base64 encoding and decoding
URL encoding query strings
converting strings for transport or escaping

Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 to plain text.

Encode credentials for HTTP Basic Authentication headers

URL Encoder & Decoder

Encode and decode URLs and query string parameters.

Encode query string parameters before appending to a URL

HTML Entities Encoder & Decoder

Convert special characters to HTML entities and vice versa.

Safely encode user input before inserting into HTML to prevent XSS

Escape String

Escape special characters for use in code.

Escape a string to safely embed in a JavaScript string literal

ROT13 Cipher

Encode and decode text using the ROT13 substitution cipher.

Obscure spoilers in forum posts (traditional use of ROT13)

Text to Binary Converter

Convert text to binary code or binary back to text.

Learn how ASCII text is represented in binary

Text to Hexadecimal Converter

Convert text to hexadecimal or hex back to text.

Inspect raw byte values of text in hex

Morse Code Converter

Convert text to Morse code or decode Morse code to text.

Learn or practice Morse code

Reverse Cipher

Encode text using a simple reverse substitution cipher.

Create simple encoded messages for puzzles

How to Choose a Tool in Encode and Decode Tools

Pick encode and decode tools when the challenge is transport, compatibility, or representation rather than wording. They are most useful in technical and data-handling workflows.