Base64 Decoder
Decode any Base64 string back to plain text instantly. Supports Unicode. Free online Base64 decoder — paste your Base64, click Decode, copy the result. Nothing uploaded.
Frequently Asked Questions
What is Base64 decoding?
Base64 decoding reverses Base64 encoding, converting a Base64 string back to its original text or binary data.
How do I decode a Base64 string?
Paste your Base64 string into the input and click Decode. The original text appears in the output immediately.
What if my Base64 string is invalid?
An error message is shown if the input is not valid Base64. Common issues include missing padding (=) or invalid characters.