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Free Base64 encoder and decoder for text. Supports standard and URL-safe alphabets. Runs locally in your browser.
Encode turns text into Base64. Decode turns Base64 back into text. Use URL-safe mode for tokens embedded in links.
Base64 encodes binary data as ASCII text using 64 characters. It is common in data URLs, tokens, and APIs.
A variant that replaces + and / with - and _ and often omits padding, safer inside URLs.
No. Invalid characters or padding produce an error.
No. Encoding and decoding run in your browser.