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.
Encode and decode Base64
Base64 is a way of representing binary data, like images or files, using only plain text characters. This tool encodes text or files into Base64 and decodes Base64 back to its original form.
It is widely used to embed data in HTML, CSS, JSON and emails, where only text is allowed.
What Base64 is for
- Embedding small images directly in CSS or HTML as data URIs.
- Encoding data for APIs, tokens and config files.
- Inspecting or debugging Base64 strings you have received.
- Need the web variant for links? Use the URL encoder. For checksums, the hash generator.
Safe and local
Encoding and decoding happen in your browser, so even sensitive data never leaves your device.