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Base64 Encode / Decode

Encode or decode UTF-8 Base64 text entirely in your browser.

Operation

Up to 5,000 characters. Runs locally in your browser.

Base64 output
SGVsbG8sIHdvcmxkIQ==
13 UTF-8 bytes
Input characters13
Encoded length20

About the Base64 Encode / Decode

Encode or decode UTF-8 Base64 text entirely in your browser.

It runs entirely in your browser — nothing you type is sent to a server — and the result updates as you edit the inputs. Estimates are for educational and informational purposes only; see ourdisclaimer.

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