What happens if the input is not valid Base64?

An error message is shown explaining the input is not valid Base64.

Can it decode Base64 URLs?

Yes. It handles both standard Base64 and Base64URL variants.

This tool decodes to text. For binary files encoded in Base64, you'll need a specialized tool.

Encoding Tools

Decode Base64-encoded text back to its original form.

100% client-side processing

100% client-side — your text never leaves your browser

Input

0 characters|0 words|0 lines

Output

0 characters|0 words|0 lines

Decode Base64-encoded text back to its original form.. Runs 100% client-side — no data is sent to any server.

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Base64 Encode

Encode text to Base64 with URL-safe variant option

Base64 Decode

Decode Base64 strings to plain text

URL Encode

Encode text for safe use in URLs