Encoding
Encoders and decoders for everyday formats
Base64, URL, JWT, hex, binary, Unicode escape, HTML entities. Paste in, read out, done. All processing happens in your browser — input never leaves your machine.
Base64 Encode & Decode
Free online Base64 encoder and decoder. UTF-8 safe, works offline, runs entirely in your browser.
URL Encoder & Decoder
Encode and decode URL components per RFC 3986. UTF-8 safe, runs in your browser.
JWT Decoder
Inspect JSON Web Tokens in your browser. Header, payload, expiry. No key required, no data sent.
HTML Entity Encoder / Decoder
Encode/decode HTML entities (&, <, >, named, numeric, hex). Full HTML5 entity set.
Hex Encode / Decode
Convert text to and from hexadecimal bytes. UTF-8 safe — handles emoji, Vietnamese, CJK. Configurable separator and 0x prefix.
Binary Encode / Decode
Convert text to and from 8-bit binary. UTF-8 safe. Configurable byte separator.
Unicode Escape / Unescape
Convert text to \uXXXX or \u{XXXXX} escapes and back. Handles surrogate pairs for emoji. Output JSON-safe or ES2015 syntax.