Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to plain text — instantly in your browser.
Plain Text Input
Base64 Output
Base64 output will appear here
Base64 Encoder and Decoder
Paste any plain text and instantly encode it to Base64, or paste a Base64 string to decode it back to readable text. The tool handles full Unicode including emoji by UTF-8 encoding before conversion. No data leaves your browser.
Frequently Asked Questions
- What is Base64 encoding?
- Base64 is a binary-to-text encoding scheme that represents binary data using 64 printable ASCII characters. It is commonly used to transmit binary data over text-based protocols like HTTP and email.
- Is my data safe when using this tool?
- Yes. All encoding and decoding happens entirely in your browser using JavaScript. No data is ever sent to a server.
- Why does my Base64 string end with == or =?
- Base64 encodes data in 3-byte blocks. If the input is not divisible by 3, padding characters (=) are added to make the output a multiple of 4 characters.
- Can Base64 handle Unicode or emoji?
- Yes. This tool first UTF-8 encodes the input before Base64 encoding, so it correctly handles any Unicode character including emoji.
- What is the difference between Base64 and encryption?
- Base64 is encoding, not encryption. Anyone with a Base64 decoder can read the original content. Do not use Base64 to protect sensitive data — use proper encryption for that.