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Universal encoding converter. Paste hex, binary, Base64, URL-encoded, HTML entities, Unicode escapes, or plain text. Auto-detect format and convert to all others instantly.
A comprehensive Numeral and Text Converter for Binary, Hexadecimal, Decimal, Octal, ASCII, Base64, URL encoding, HTML entities, and developer escape sequences. This professional-grade utility supports multiple powerful modes: Smart Mode for instant auto-detection and multi-format output, Single Number mode for custom base conversion (base 2 to 36) with an interactive IEEE 754 float visualizer and 8-bit visualizer, Encode/Decode mode for direct translation, Text/Bytes mode for multi-byte array breakdown, and a local-first JWT Decoder. All computations run 100% locally in your browser for absolute privacy and security.
Paste your hex value (e.g., '48 65 6C 6C 6F') directly into the input field. The tool automatically detects it as hexadecimal and shows the plain text result ('Hello') alongside binary, Base64, URL-encoded, and all other formats instantly.
Paste your Base64 string into the input. The tool detects it automatically and shows the decoded text plus all other encoding formats. It supports standard Base64, URL-safe Base64, and MIME Base64.
URL encoding (percent encoding) replaces unsafe URL characters with %XX hex codes. Base64 encodes binary data as printable ASCII text. URL encoding is for web addresses; Base64 is for transmitting binary data in text-based systems like email and APIs.
Yes. All text is processed as UTF-8, which supports all Unicode characters including emoji, CJK ideographs, Arabic, and any other script. The tool shows the exact byte representation for each character.
Completely. All conversion happens inside your browser using local JavaScript. Your text, files, and encoded values never leave your device and are never sent to any server.
Select the JWT tab and paste your JWT token. The tool decodes the header and payload sections and displays them as formatted JSON. Note: signature verification requires the secret key and cannot be done client-side.
Binary, Octal, Decimal bytes, Hexadecimal, UTF-8, UTF-16, UTF-32, ASCII, Latin-1, Windows-1252, Base64, Base64 URL-safe, Base32, URL encoding, HTML entities, Unicode escapes (JS/Python/CSS/Java/C/Rust/Go), Morse code, ROT13, Caesar cipher, Atbash, and JWT decode.