Base64 Encoder & Decoder
Transform text to and from Base64 in the browser.
Local-first
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Drop file or paste textResult
Output will appear herePaste into the input to see results instantly
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Accepts:
Plain textUTF-8 / ASCII string
Outputs:
Standard Base64URL-Safe Base64
RFC 4648 compliant encoding
How this tool works
What it accepts, how to use it, and where your input is processed.
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How this tool works
What it accepts, how to use it, and where your input is processed.
Show GuideHide Guide
Easily convert your data between plain text and ASCII string format with our Secure Online Base64 Converter.
Privacy Rating
Local processing
Compliance
RFC 4648
Architecture
Client-Side JS
What is Base64 Encoding?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format.
Common Use Cases
- Data URIs for Performance
- Basic Authentication
- JWT Payloads
Need an extra feature or found an edge case?Send Feedback
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