Encoders
Encode/decode Base64, URL, JWT and more.
Base58 Encoder
Encode and decode Base58 online with the Bitcoin alphabet. Convert text to Base58 or back, UTF-8 safe, no confusing 0 O I l. Runs in your browser.
Base64 Decode
Decode Base64 to plain text online. Paste a Base64 or base64url string and get instant UTF-8 output. Free, fast and runs in your browser.
Base64 Encode
Encode text to Base64 online. UTF-8 safe, handles emoji and accents, with an optional URL-safe (base64url) mode. Runs in your browser, nothing uploaded.
Basic Auth Generator
Generate an HTTP Basic Authorization header from a username and password. Get the base64 value, header line and ready curl commands. Runs in your browser.
Data URI Generator
Turn text, SVG or HTML into a data: URI. Pick base64 or compact URL encoding and copy ready-made CSS background and HTML img snippets. Runs in your browser.
HTML Entity Decoder
Decode HTML entities online. Turn named, decimal and hex entities like & and é back into plain text and symbols. Runs in your browser.
HTML Entity Encoder
Encode text to HTML entities online. Escape &, <, >, " and ' so markup renders safely, with an option to convert non-ASCII characters too. Free and private.
JWT Decoder
Decode a JSON Web Token to read its header and payload claims. Shows exp, iat and nbf as dates. Runs in your browser. No signature check.
Punycode Converter
Convert internationalized domains and emails to Punycode (xn--) and decode xn-- back to Unicode. RFC 3492, label aware, fast and private in your browser.
URL Decoder
Decode URL-encoded text online. Turn %20, %26 and + back into readable characters, with full unicode support. Free, instant and runs in your browser.
URL Encoder
URL encode text online with percent-encoding. Escape spaces and reserved characters for a query value, or encode a full URL. Free and private.