Encoding Tools

Base64 Decode & Encode

Base64 decode and encode online in one live two-way box. UTF-8 safe, URL-safe toggle, padding handled, exact error messages.

Base64 Decoder

Decode Base64 to text online. Paste Base64, base64url, MIME or a data URI and read the UTF-8 text instantly.

Base64 Encoder

Encode text to Base64 online. UTF-8 safe for any language and emoji, with URL-safe and padding options.

Base32 Encode & Decode

Free online Base32 encoder and decoder. RFC 4648, base32hex and Crockford Base32 with optional check symbol, padding toggle, text or hex input.

UTF-8 Encoder & Decoder

Encode text to UTF-8 bytes or decode bytes to text in hex, binary or decimal, with invalid-byte detection.

Text to UTF-8 Hex Converter

Convert text to UTF-8 hex bytes as spaced hex, 0x, \x, %XX or a C array.

Text to Unicode Converter

Convert text to Unicode code points (U+XXXX) with category and script per character.

Unicode to Text Converter

Convert U+XXXX, 0x and \u{...} code points back to text.

UTF-16 Converter

Text to UTF-16 code units and bytes (BE or LE, BOM) and back, with surrogate pairs.

Unicode Escape Sequence Converter

Convert text to and from \uXXXX, \u{...}, \U and CSS escape sequences.

Emoji to Unicode Converter

Emoji to Unicode code points, with ZWJ, skin tone, flag and keycap sequences explained.

String Byte Length Calculator

String length in UTF-8, UTF-16 and UTF-32 bytes, code points and characters, with a limit check.

Unicode Code Point Lookup

Look up a Unicode code point: plane, category, script, UTF-8/16/32 and escapes.

URL Encoder & Decoder

Free online URL encoder and decoder. Percent-encode text for safe URL transmission or decode percent-encoded strings. Component or full-URL mode.

Base64 to Image / PDF / File

Decode Base64 or a data URI back into a file, identify its type and download it. Runs in your browser.

JWT Decoder

Decode a JSON Web Token's header and payload claims instantly. Runs entirely in your browser, no signature verification.

Data URI Generator & Decoder

Turn a file or text into a data: URI (Base64 or percent-encoded), or decode one with MIME sniffing, preview and size overhead.

HTML Entity Encoder & Decoder

Free HTML entity encoder and decoder. Escape minimal or all non-ASCII characters, decode with the WHATWG table including legacy forms, and search every named entity.

Punycode & IDN Converter

Free Punycode and IDN converter. Turn a Unicode domain into its xn-- form and back, label by label (RFC 3492), with a mixed-script homograph warning and a check against…