How do I decode a Base64 string?

Paste your Base64-encoded string in the left panel. The decoded plain text appears instantly in the right panel. Click 'Copy Output' to copy the result or 'Load Example' to see a sample.

What is Base64 decoding?

Base64 decoding reverses Base64 encoding, converting the 64-character ASCII representation back to the original binary or text data. Full UTF-8 and Unicode support is included.

Is the Base64 decoder free?

Yes, completely free. The decoding runs entirely in your browser — no data is sent to any server, and no signup is required.

Base64 Decoder

Decode Base64 strings back to plain text instantly online. Free Base64 decoder with full UTF-8 support. No signup required.

Base64 Input

Decoded Text

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How to Use the Base64 Decoder

Paste your Base64-encoded string in the left panel.
The decoded text appears instantly in the right panel.
Click "Copy Output" to copy the decoded result.
Use "Load Example" to see a sample decoding.
Whitespace in the input is automatically stripped.

Common Use Cases

Decoding JWT token payloads and headers.
Reading Base64-encoded email attachments.
Inspecting data URIs embedded in HTML or CSS.
Debugging API responses that use Base64 encoding.