Base64 Decode String Online
Decode Base64 strings or encode UTF-8 text in the browser for token inspection, payload checks, and API debugging.
Quick answer
This page decodes Base64 strings or encodes UTF-8 text in the browser for quick token checks, payload inspection, and API debugging.
It is useful when you want to inspect copied values without switching to a terminal or writing a script.
Input
Plain text
Output
Converted result
How to use
- Paste plain text to encode or a Base64 string to decode.
- Choose Encode or Decode.
- Copy the result when the status turns successful.
Common questions this page answers
- How do I decode a Base64 string online?
- How do I encode UTF-8 text to Base64?
- How do I inspect a copied token or payload in the browser?
Example input and output
Input for decode
eyJyb2xlIjoiYWRtaW4iLCJhY3RpdmUiOnRydWV9Output
{"role":"admin","active":true}FAQ
Does this page handle UTF-8 text safely?
Yes. It uses TextEncoder and TextDecoder so non-ASCII characters survive encode and decode cycles.
What happens if the Base64 string is invalid?
Invalid input is caught and shown as an error instead of breaking the page.
When is this more useful than a terminal command?
It is useful when you already have the value in the browser and only need a fast inspection or conversion.