Base64 & URL Encoder / Decoder
Encode and decode Base64, URL, and HTML entities instantly in your browser — free, no sign-up required.
Output will appear here...
How to Use the Encoder / Decoder
- 1
Select the encoding type
Choose between Base64, URL encoding, or HTML entity encoding using the tabs. Each mode handles different use cases like data transport, URL safety, or XSS prevention.
- 2
Toggle encode or decode mode
Click the encode/decode toggle to switch direction. Paste your plain text to encode it, or paste an encoded string to decode it back to readable text.
- 3
Copy the result
The output updates instantly as you type. Click copy to send it to your clipboard. All encoding and decoding runs locally — your data is never sent to a server.
What is a Base64 Encoder / Decoder?
Base64 encoding converts binary data or text into a subset of ASCII characters, making it safe to transmit in URLs, emails, and JSON. A URL encoder converts special characters like spaces and symbols into percent-encoded equivalents (e.g., %20). HTML encoding converts characters like < and > into HTML entities to prevent XSS vulnerabilities. Use this free tool to encode and decode all three formats instantly in your browser.