Base64 Encode Calculator

Encodes the displayed numeric text as UTF-8 Base64.

Choose Base64 inputEncode numeric text, encode a browser-local byte, or demonstrate a safe decode round trip.

7 options

Workflow

Numeric text

BASE64 ENCODE / DECODEMjAyNg==

Encoded 4 UTF-8 text characters locally

Estimate based on the values shown

Formula checkedUses browser-native Base64 encoding locally; file-byte mode never uploads data. Text and file modes use browser-local bytes and never upload data.

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