Tool
Base64 Decoder
Decode Base64 strings back to readable text.
Developer Tools
What this tool does
Decode Base64 strings into readable text output.
How to use
- Paste a Base64 string.
- Review decoded text.
- Copy the readable output.
Examples
Sample decode
Input: SGVsbG8gd29ybGQ=
Output: Hello world
Base64 is decoded to UTF-8 text.
Common use cases
- Inspect API token payloads
- Decode debug strings
- Reverse Base64 test fixtures
FAQ
What if the string is invalid?
You will see a clear invalid Base64 error.
Can I encode again?
Yes. Use the Base64 Encoder tool.
Are line breaks supported?
Trim whitespace before decoding for best results.
Explore related workflows
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Last reviewed: 2026-05-23