Base64 Decoder
Decode Base64 strings to plain text online. Instantly reverse Base64 encoding to retrieve the original text or binary content.
Decoded Output
What is Base64 Decoding?
Base64 decoding reverses the Base64 encoding process, converting a Base64-encoded string back into its original plain text or binary representation.
How to use this tool
- Paste your Base64-encoded string into the input field
- Click Decode to convert it back to plain text
- If the input is invalid Base64, an error message will be shown
Common use cases
- Decoding JWT token payloads to inspect their contents
- Decoding Basic Auth header credentials
- Decoding data URIs to retrieve the original content
- Inspecting Base64-encoded API responses
- Debugging encoded strings in logs or config files
Example
Input: SGVsbG8sIFdvcmxkIQ==
Output: Hello, World!
Notes
This tool supports UTF-8 encoded content, so international characters and emoji decode correctly.
Privacy
All processing happens in your browser. Nothing is transmitted.