How do I decode a Base64 string?

Paste the Base64 into the decoder input and the decoded UTF-8 text appears automatically. A badge shows whether the format is valid.

What if the Base64 is invalid?

The decoder checks the format and shows an 'Invalid Format' badge plus an error message so you can correct the input.

Does it support Unicode output?

Yes. The decoder interprets bytes as UTF-8, so multibyte characters and emoji are restored correctly.

No. Decoding happens locally in your browser; nothing is sent to a server.

Base64 Decode

Decode Base64 to text online — paste a Base64 string and get the original UTF-8 text instantly. Free and browser-based.

Base64 Input

Decoded Output (UTF-8 Text)

About Base64 Decode

Paste a Base64 string and recover the original text instantly. The decoder validates the input format, handles UTF-8 correctly, and runs entirely in your browser.

Decoding Base64 is useful for inspecting data URIs, JWT segments, encoded config values, and any text-safe payload you have received. If the input is not valid Base64, the tool flags it clearly.

How to use Base64 Decode

Paste the Base64
Paste your Base64 string into the Base64 Input editor.
Read the text
The decoded UTF-8 text appears in the output editor.
Copy the result
Use the copy button to grab the decoded text.

Frequently asked questions

Base64 Encoder / Decoder

The full encode + decode tool.

Base64 Encode

Encode text to Base64.

Looking for the full tool? Open the complete converter.

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