Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text. Fast, free, and runs entirely in your browser.
Convert plain text to Base64 or decode Base64 back into readable text for API testing, email templates, data URLs, and developer workflows. The tool is designed for quick copy-and-paste conversions with clear output.
How to use Base64 Encoder / Decoder
- Paste plain text when you want to encode, or paste a Base64 string when you want to decode.
- Choose the encode or decode action depending on the direction of conversion.
- Copy the converted result and use it in your request body, data URL, test case, or documentation.
Features
- Encodes UTF-8 text into Base64 for safe transport in text-based systems.
- Decodes Base64 strings into readable text when the source data is valid.
- Useful for API payloads, Basic Auth experiments, data URLs, and quick debugging.
- Runs locally in the browser for fast conversions without a server round trip.
Examples
Encode text
FreeToolJet
RnJlZVRvb2xKZXQ=
Decode a Base64 value
SGVsbG8sIHdvcmxkIQ==
Hello, world!
Privacy
Conversions happen in your browser. Do not treat Base64 as a secure way to hide passwords, tokens, or secrets.
FAQ
Is Base64 encryption?
No. Base64 is an encoding format, not encryption. Anyone can decode a Base64 string if they have the value.
Why does decoded Base64 sometimes look unreadable?
The original data may be binary, compressed, encrypted, or encoded with a character set that is not plain UTF-8 text.
Can I use this for API testing?
Yes. It is useful for quick API experiments, fixtures, and checking encoded values before sending a request.