Base64 Decode

Paste a Base64 string below and click Decode to convert it back to plain text. All processing happens locally in your browser.

What is Base64 Decoding?

Base64 decoding converts a Base64-encoded ASCII string back into the original binary data or text. This is the reverse of Base64 encoding.

If the input contains characters outside the Base64 alphabet (A-Z, a-z, 0-9, +, /, =), decoding will fail with an error.