Base64 Encoder Decoder Online - Free Base64 Tool

Base64 Converter

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Mode

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Base64 Valid

No conversion mode selected

Choose Encode or Decode below. The selected mode stays highlighted and updates automatically while typing.

Invalid Base64 input. Please check your encoded text and try again.

Output

Best Use Cases

Encode plain text into Base64 format
Decode Base64 strings into readable text
Convert API payloads during development
Inspect encoded configuration values
Work with web data, tokens, and text encoding

What is Base64 Encoder Decoder?

Base64 Encoder Decoder is a free online tool that converts plain text into Base64 format and decodes Base64 strings back into readable text. It is useful for developers, testers, students, and anyone working with encoded text data.

What is Base64?

Base64 is an encoding format that represents binary or text data using readable ASCII characters. It is commonly used in web development, APIs, email systems, data URLs, tokens, and configuration files.

Available Modes

Encode to Base64: Converts normal text into Base64 encoded text.
Decode Base64: Converts Base64 encoded text back into readable text.
Auto Detect: Tries to detect whether your input should be encoded or decoded.

Common Use Cases

Encode text for web development
Decode Base64 API responses
Inspect encoded configuration strings
Convert text for testing and debugging
Work with data URLs and encoded payloads

Frequently Asked Questions

Is this Base64 Encoder Decoder free?
Yes. This tool is completely free to use online.

Does this tool upload or save my text?
No. Everything is processed directly in your browser.

Can I decode invalid Base64?
Invalid Base64 text may fail to decode. The tool will show an error if the input is not valid.