Base64 Decoder
Runs locally
Paste Base64 to decode it back into readable text, entirely in your browser.
- Free to use
- No registration
- Runs locally in your browser
- Your data is never uploaded
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Decoded text
Your data is processed locally in your browser and is not uploaded.
Learn more about this tool⌄
Example
Base64 back to plain text
SGVsbG8sIE5vdmlpbG8h
Hello, Noviilo!
How it works
Base64 is decoded to bytes, then interpreted as UTF-8 text.
Common use cases
- Inspecting Base64-encoded tokens
- Reading Base64 payloads from logs or APIs
Frequently asked questions
- What happens with invalid Base64?
- You'll see a clear error message rather than a broken or silent result.