Encoders And Decoders

Encode and decode text with the ancient Atbash mirror cipher (A↔Z, B↔Y, C↔X, …). Includes a live mirror visualization, full pair table, biblical Hebrew Atbash variant, digit-mirror mode, and round-trip self-inverse proof.

Decode Base64 encoded strings to plain text with detailed byte analysis, character breakdown, multiple output formats (text, hex, binary), URL-safe support, and encoding validation.

Encode text or files to Base64 with multiple encoding variants (Standard, URL-safe, MIME), real-time preview, encoding process visualization, and one-click copy. Supports UTF-8, ASCII, and binary data.

Decode JSON Web Tokens to read the header and payload claims without verifying the signature. Visualise the token structure, inspect claims, check expiry times and debug authentication issues entirely on your own device.

Generate signed JSON Web Tokens (JWT) with custom header, payload claims, and HMAC signing algorithms (HS256/HS384/HS512). Includes quick claim presets, expiry helper, live token preview, and a visual breakdown of the three JWT segments.

Decode Morse code to text instantly. Features visual Morse code chart, audio preview, and step-by-step decoding breakdown for easy learning.

Convert text to morse code with visual breakdown and audio playback. Learn International Morse Code with step-by-step character translation and sound generation.

Encode and decode ROT13 ciphertext instantly with a live alphabet wheel, character-by-character mapping, ROT5 for digits, ROT18 for letters and digits, and ROT47 for all printable ASCII characters.

Convert text to binary, hexadecimal, and ASCII codes (or decode them back) with a live multi-format preview, per-character breakdown, separator and padding options, and full Unicode (UTF-8) support.

Decode URL-encoded (percent-encoded) strings with real-time preview, recursive multi-layer decoding, URL component breakdown, query parameter parsing, and encoding analysis. Supports UTF-8 and all percent-encoded characters.

Encode text for URLs with multiple encoding modes (RFC 3986, Query String, Form Data), visual character-by-character breakdown, and comprehensive encoding analysis. See exactly which characters get encoded and why.

Validate UUID strings, normalize GUID formats, and decode UUID v1, v4, and v5 metadata including timestamp, variant, node, random payload, and v5 namespace/name verification.

Encrypt and decrypt text with the Vigenere polyalphabetic cipher using your own keyword. Includes a live key-alignment stream, a tabula recta visualization, the Autokey and Beaufort variants, round-trip proof and a Kasiski period hint.