Standard example
data = SGVsbG8sIHdvcmxkIQ==
Result: Hello, world!
Base64 Decoder
Convert base64 back to text. Invalid base64 is flagged before decoding, and payloads that decode to binary data (not UTF-8 text) are reported instead of producing garbage. Runs entirely in your browser.
Privacy: this tool processes your data entirely in your browser. Nothing you paste or type is sent to the server.
Enter your values and press Calculate — the result appears here.
Worked examples
Unicode payload
data = SMOpbGxvIPCfkYs=
Result: Héllo 👋
Frequently asked questions
What if the output looks like garbage?
The payload probably contains binary data rather than text. This tool decodes strictly as UTF-8 and reports such cases instead of showing replacement characters.
Is padding (=) required?
The decoder accepts standard padded base64. If your string came from a source that strips padding, add = characters until the length is a multiple of 4.
Is my data safe?
Yes — decoding happens entirely in your browser. Nothing you paste is sent to a server.
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