Base64 Encoder/Decoder
Encode or decode data in Base64.
How to Use the Free Online Base64 Converter
Enter Data: Paste your plain text into the 'Plain Text' box, or your Base64 string into the 'Base64' box.
Encode or Decode: Click 'Encode to Base64' to convert plain text, or 'Decode from Base64' to convert a Base64 string.
Get Results: The converted output will appear in the other box instantly.
Copy: Use the 'Copy' buttons for a quick and easy way to get your results. This online tool is completely free!
Frequently Asked Questions
What is Base64 encoding used for?
Base64 is commonly used to transmit data over media that are designed to handle only plain text. It is a way to safely encode binary data, like images or files, into a string of readable characters for transport.
Is this online Base64 converter secure?
Yes, it is completely secure. All encoding and decoding operations happen directly in your browser. No data is ever sent to our servers, ensuring your information remains private.
Is there a limit on the amount of text I can convert for free?
While there is a practical limit based on your browser's performance, our online tool is designed to handle very large text inputs for free. For extremely large files, a dedicated offline tool might be more performant.
Common tasks
Encode plain text to Base64 or decode Base64 strings for debugging, data transfer, and quick inspection.
- Decode Base64 API values.
- Encode text for safe transport.
- Inspect tokens or config strings.
- Convert small text snippets quickly.
Privacy and limits
Use the tool with the minimum data needed for the task. Check the result before using it in production, finance, legal, health, or client-facing work.
Maintained by Conversores Online. Last reviewed: May 29, 2026
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