免费URL编码器和解码器

URLs can only contain a limited set of characters. Special characters (spaces, &, =, ?, #, etc.) must be percent-encoded as %XX where XX is the hex ASCII value. Without encoding, browsers misinterpret the URL structure.

encodeURI encodes a full URL and leaves URL structure characters (/, ?, &, =, #) alone. encodeURIComponent encodes everything except letters, digits, and - _ . ! ~ * ' ( ) — use it for query parameter values.

Standard URL encoding converts space to %20. HTML form encoding converts space to + (plus sign). Both are valid in different contexts — query parameters in HTML forms often use +.

Enter just the query parameter values for encoding, not the full URL. Encoding the full URL would encode the slashes and colons too, breaking the URL structure. Encode individual parameter values, then assemble the URL.

A-Z, a-z, 0-9, and the unreserved characters - _ . ~ are safe in any URL context and don't need encoding. Everything else should be percent-encoded when used in query string values.

Yes, the URL编解码 on Allio Tools is completely free with no sign-up or registration required. It works directly in your browser.

使用百分比编码（RFC 3986）对URL进行编码和解码。 No data is sent to a server — everything runs locally in your browser for maximum privacy and speed.

No installation needed. The URL编解码 runs entirely in your web browser on any device — desktop, tablet, or mobile.

Completely safe. The URL编解码 processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.

After the page loads for the first time, the URL编解码 works without an internet connection for all client-side processing. Tools that fetch live external data (such as DNS or network lookups) require an active connection.

Yes. The URL编解码 is a utility tool and its output carries no licensing restrictions. You are free to use results in any project, commercial or personal.

Yes. The URL编解码 is built to comply with the relevant industry standard or specification for this utility type. If you encounter an unexpected result, verify your input against the specification — edge cases outside the standard may produce undefined behaviour.

Yes. The URL编解码 is built with standard browser APIs and works on all modern browsers including Chrome, Firefox, Safari, and Edge — on both desktop and mobile. No plugins, extensions, or third-party software are required.

Select and copy the result text to paste into any document or app. For image tools, a Download button saves the file directly to your device. Your browser's built-in screenshot function also captures results quickly. No account or login is required.