Base64 Decode Online
Paste a Base64 string from a token, config file or data URL and read the original text. Decoding happens locally, which matters when the payload contains internal data.
Runs in your browser — your text is never uploaded or stored.
Base64 string
Decoded text
How to Use
- 1.Paste the Base64 string into the input box.
- 2.Read the decoded text in the output box.
- 3.Copy the result wherever you need it.
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FAQ
Why does decoding fail?
The string must be valid Base64. Strip prefixes like data:text/plain;base64, and remove stray spaces or line breaks first.
Can I decode a JWT here?
Use the JWT decoder instead — it splits the token and pretty-prints the header and payload for you.
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Base64 Encode/Decode
Encode text to Base64 or decode a Base64 string back to text. UTF-8 safe, free, and runs 100% in your browser.