Base64 Encoder & Decoder
Encodes and decodes data per RFC 4648 Base64, with options for URL-safe alphabet and file input.
What Base64 Encoder & Decoder does
Base64 encoding and decoding tool for text or files, with options to customize output format and character encoding, and a preview of the encoded result before submission. Includes copy-to-clipboard functionality for the generated output and a reset button to clear all fields and start fresh. The interface is designed for quick encoding and decoding of text data, supporting various input formats and character sets.
How to use the FreeFormatter Base64 Encoder & Decoder
- 1
Enter or paste the text you want to encode or decode in the input field.
- 2
The tool will automatically detect if the input is Base64-encoded and decode it, or encode it if it's plain text.
- 3
Click the 'Encode' or 'Decode' button to process the text.
- 4
Use the 'Copy' button to copy the result to your clipboard.
Best for
Quick encoding/decoding of text data, encoding strings for URLs or APIs, and handling binary data in a text-compatible format.
Limitations
- May not handle extremely large files efficiently
- Base64 encoding increases data size by approximately 33%
- Not suitable for very large files or binary data streams
Base64 Encoder & Decoder FAQ
- Can I use this tool to decode any base64 string?
- Yes, the decoder supports most standard Base64 strings. If the input is not valid Base64, the tool will return an error.
- Can I use this tool to decode images or files?
- No, this tool only handles text-based encoding. For binary files like images or audio, you would need to use Base64 encoding to embed the data, then decode it on the receiving end.
- Is my data private when using this tool?
- Yes, all processing happens client-side in your browser. No data is sent to our servers or stored.
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