Base64 Encode / Decode

Encode text to Base64 or decode Base64 to text in your browser. Handles UTF-8 safely. No data is sent to any server.

Text to encode

How to use

Choose mode
Switch between Encode (text → Base64) and Decode (Base64 → text) using the buttons.
Enter input
Type or paste your text or Base64 string. Decoding supports standard Base64; invalid input shows an error.
Copy result
Use the Copy button to copy the encoded or decoded result.

Examples

Encode example
Encoding 'Hello' produces the following Base64.
Input
```
Hello
```
Output
```
SGVsbG8=
```

Frequently asked questions

Is UTF-8 supported?: Yes. Encoding and decoding correctly handle multi-byte UTF-8 characters so non-ASCII text works as expected.
Why does decoding sometimes fail?: Base64 strings must use the standard alphabet and padding. Extra spaces or invalid characters will cause a decode error. Remove line breaks or other noise and try again.

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