Escape & Encode
Base64 Encode
Wrap long lines in the input and output
Text
Paste text to encode it as Base64 as you type.
Base64
Escape & Encode
Paste text to encode it as Base64 as you type.
Base64 Encode turns text into the Base64 alphabet defined by RFC 4648. Paste a note, a token or a short phrase and the output updates as you type. The text is read as UTF-8, so accents and emoji survive a round trip.
The standard alphabet uses + and / and adds = padding when the byte length is not a multiple of three. The URL-safe option writes - and _ instead and leaves the padding off, which is what many URLs and file names expect.
Encoding runs in your browser and the text you paste is never uploaded. Swap sends the result to Base64 Decode so you can check the round trip.
It rewrites text as ASCII using the Base64 alphabet so the text can travel through systems that only allow a limited character set. The tool reads the text as UTF-8 bytes, then writes those bytes with letters, digits, + and /.
It writes - and _ instead of + and /, and it omits the trailing = padding. The bytes are the same. Turn it on when the result has to sit in a URL, a cookie or a file name.
btoa?For plain ASCII, the standard alphabet matches btoa. btoa throws when a character is above U+00FF, and it treats characters from U+0080 through U+00FF as one byte rather than UTF-8. This tool always encodes UTF-8, so accents and emoji round-trip.
No. Encoding runs in your browser and the text you paste is never uploaded, logged or stored. Google Analytics records page views and feature use, never content.
Decode Base64 to text as you type, including emoji and accents. Standard and URL-safe alphabets both work. Runs in your browser; your text is never uploaded.
Turn text into a valid JSON string literal, or decode one back to plain text.
Percent-encode text for a URL, or decode a percent-encoded string.
Escape text for HTML, or decode entities back to characters.
Escape text as a JavaScript string literal, or decode those escapes.
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