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.
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.