URL Encode / Decode
Encode and decode URLs with percent encoding.
Encode text to Base64 or decode Base64 back to plain text.
Base64 is an encoding scheme that converts binary data or text into an ASCII string. It is widely used for email attachments, data URIs, and API data transfer.
Yes, it is completely free to use.
No. All processing happens in your browser. Nothing is sent to a server.
Yes. It supports Unicode strings including Japanese. The input is encoded as UTF-8 internally.