Base64 EncoderNothing uploadedNo sign-upNo watermark

Base64 Encode & Decode

Convert text to Base64 and back, with full Unicode support and a URL-safe option. Runs entirely in your browser.

Plain text

Base64

The result appears here

Base64 Without Pasting Secrets Into Someone's Server

Base64 strings often hold tokens and credentials. This tool never sends what you paste — the encoding happens in your own browser.

Nothing Leaves The PageYour text is transformed in the browser. No request is made and nothing is stored.

Text Or Data URLsEncode plain text, or decode a payload someone sent you.

Unicode SafeEncodes to UTF-8 bytes first, so accents and emoji survive the round trip.

URL-Safe VariantSwap + and / for - and _ and drop the padding, for tokens and query strings.

InstantRuns as you type — no button to press and no waiting on a server.

Works OfflinePure JavaScript with no dependencies, so it keeps working with no connection.