Base64 Encoder & Decoder

Encode to Base64 or decode Base64 strings online for free. Secure, fast, and completely client-side.

Convert plain text into Base64 encoded strings, or decode existing Base64 strings back into readable text. All processing happens entirely within your browser.

How to Use Base64

  1. Select either "Encode" or "Decode" mode.
  2. Paste your text or Base64 string into the input editor.
  3. The tool instantly performs the conversion in real-time.
  4. Copy the output.

What Is Base64?

Base64 Encoding is a mechanism for converting binary data into a string format consisting only of 64 printable ASCII characters. This ensures the data survives transport through protocols that may not handle binary or special characters cleanly (such as HTTP, HTML, or JSON).

Base64 Example

Input
Hello World
Output
SGVsbG8gV29ybGQ=

Frequently Asked Questions

Is Base64 encryption?

No. Base64 is merely an encoding format, not encryption. It provides zero security and can be easily decoded by anyone. Never use Base64 to secure passwords or sensitive data.

Does this tool send data to a server?

No. The encoding and decoding processes happen securely in your local browser using the native Web API.

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