Base64 Encoder & Decoder – Free Online
Encode any text to Base64 or decode Base64 back to plain text instantly. No server needed — runs entirely in your browser.
Input
Output
How to Use
- 1
Paste your text into the input field
- 2
Click "Encode" to convert to Base64 or "Decode" to convert back
- 3
Copy the result with the copy button
Frequently Asked Questions
What is Base64 encoding?
Base64 is a method of encoding binary data as ASCII text. It is widely used to transmit data over text-based protocols like email and HTTP.
Can I decode any Base64 string?
Yes, as long as the string is valid Base64. The tool will show an error if the input is not a valid Base64 encoded string.
Does this support Unicode characters?
Yes — the tool handles Unicode characters including emojis and accented letters using UTF-8 encoding.
Is my data sent to a server?
No — all encoding and decoding happens locally in your browser. No data is ever sent to any server.