無料URLエンコーダー＆デコーダー
パーセントエンコーディング（RFC 3986）を使用してURLをエンコード・デコードします。
Frequently Asked Questions
Is the URLエンコーダー free to use?
Yes, the URLエンコーダー on Allio Tools is completely free with no sign-up or registration required. It works directly in your browser.
How does the URLエンコーダー work?
パーセントエンコーディング（RFC 3986）を使用してURLをエンコード・デコードします。 No data is sent to a server — everything runs locally in your browser for maximum privacy and speed.
Do I need to install anything to use the URLエンコーダー?
No installation needed. The URLエンコーダー runs entirely in your web browser on any device — desktop, tablet, or mobile.
Is my data safe when using the URLエンコーダー?
Completely safe. The URLエンコーダー processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.
Does the URLエンコーダー work offline?
After the page loads for the first time, the URLエンコーダー works without an internet connection for all client-side processing. Tools that fetch live external data (such as DNS or WHOIS lookups) require an active connection.
Can I use the URLエンコーダー output in commercial projects?
Yes. The URLエンコーダー is a utility tool and its output carries no licensing restrictions. You are free to use results in any project, commercial or personal.