Base64 Encoder / Decoder
Encode and decode Base64 strings instantly
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How to use Base64 Encoder / Decoder
Free Base64 encoder and decoder. Switch between encode and decode mode. 100% client-side — your data never leaves the browser. Supports UTF-8 text.
Frequently asked questions
Base64 encodes binary data as ASCII text — used in email attachments, data URIs, JWTs, and API authentication headers.