Base64 Decoder
Paste a Base64 string and decode it back to plain text. Automatically detects and highlights JSON and XML output.
The Base64 Decoder takes any Base64-encoded string and converts it back to its original form — plain text, JSON, or XML.
After decoding, the tool automatically detects the content type. JSON is rendered as an interactive tree view and XML is formatted with full syntax colouring so you can read the structure at a glance.
All processing happens entirely in your browser — nothing is sent to any server.
- 1Decoding JWT payloads stored as Base64
- 2Inspecting Base64-encoded API responses
- 3Reading config or environment variables encoded in Base64
- 4Decoding Base64 XML from SOAP or SAML responses
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