Free Online Encoders - Base64, URL, HTML Entity & More
Cipher & Encryption Tools - AES, Blowfish, 3DES, RC4
Encrypt and decrypt with AES, Blowfish, 3DES, XTEA, RC4 and classic ciphers. Block ciphers for security, stream ciphers for analysis, ROT13 for puzzles.
HTML Entity Encoder & Decoder
Convert special characters to HTML entities and back. Escape &, <, >, quotes for safe HTML output. Prevent XSS vulnerabilities.
Morse Code Converter — Text to Morse & Back
Convert text to Morse code dots and dashes, and decode Morse back to text. Audio playback, customizable timing, and visual display.
Text Encoding Tools — Hex, Punycode, Unicode & More
Convert text to hex and back. Punycode for international domains, Unicode escapes, Quoted-Printable. Essential for serial debugging and embedded programming.
URL Encoder & Decoder Tools
Percent-encode special characters for safe URLs. Handle query strings, Unicode, and reserved characters. Choose encodeURI or encodeURIComponent mode.
Transform Data Safely
Different systems expect data in different formats. URLs need special characters escaped. HTML requires entities for certain characters. Binary files need text representation to embed in code. Our encoders handle these transformations — and can reverse them when needed.
Common Uses
Base64 — Convert images to text for embedding in CSS or HTML. Turn files into strings for APIs. Create data URIs for inline assets.
URL encoding — Make text safe for URLs. Encode query parameters, handle special characters, build links that don't break.
HTML entities — Escape characters that have special meaning in HTML. Prevent display issues and security problems.
Fun Encodings
Morse code — Convert text to dots and dashes, or decode Morse back to text.
Ciphers — ROT13, Caesar cipher, and other classic encodings for puzzles and games.
Two-Way Tools
All our encoders work in both directions. Encode data for transmission, then decode to read it. Paste encoded text to see what it contains.