Encoding Tool
Base64 Encoder Online
Encode any text or binary data to Base64 format.
Features
RFC 4648 Compliant
Produces standard Base64 output with correct padding characters.
UTF-8 Safe
Correctly encodes multi-byte UTF-8 characters including emoji and international text.
Handles Large Inputs
Encodes text of any length without size restrictions.
Output Validation
If encoding fails due to invalid input, a clear error message is shown.
How to Use
- 1
Enter text to encode
Paste any string, JSON, or text content you want to encode.
- 2
See Base64 output
The Base64-encoded string appears instantly in the output panel.
- 3
Copy the encoded string
Copy the result for use in tokens, data URIs, or API headers.
Examples
Simple string
Input
Hello, World!Output
SGVsbG8sIFdvcmxkIQ==JSON payload
Input
{"user":"alice"}Output
eyJ1c2VyIjoiYWxpY2UifQ==Common Questions
Base64 is a binary-to-text encoding that represents any binary data as a string of 64 printable ASCII characters. It allows binary data to safely pass through systems that only handle text.
No. Base64 is encoding, not encryption. It provides no security — anyone can decode a Base64 string trivially. For security, use proper encryption like AES.
The '=' characters are padding that make the encoded string a consistent length. They're part of the Base64 standard and are expected — you can include them when decoding.
Roughly a third longer. A 100-character input produces around 136 characters of Base64 output.