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Base64 Encode / Decode
Encode and decode Base64 text — standard or URL-safe alphabet, padding optional, byte counts, entirely in your browser. The text never leaves the page: the URL holds only the options.
Base64
encode · decode · UTF-8$
The decoder accepts both alphabets, with or without padding, ignores whitespace and reports which alphabet it recognised; the URL state holds only the options, never the text.