This tool is a simple, easy-to-use, fully-featured online URL encoding/decoding (UrlEncode/UrlDecode) tool. It helps developers, testers, and ordinary users quickly handle special characters and Chinese parameters in URLs, ensuring the accuracy and security of network requests.

What is URL Encoding?

URL encoding (also called percent-encoding) is a mechanism that converts special characters, reserved characters, and non-ASCII characters (such as Chinese, spaces, etc.) in URLs into a unified, safe network transmission format. In the standard URL specification, some characters have special meanings (for example, ? is used to separate query parameters, & is used to separate different parameters, and # is used to locate page anchors). If parameter values contain these characters, it can cause URL parsing ambiguity or request failure.

Main Use Cases

• When developers construct HTTP requests containing query parameters.
• Handle API calls containing Chinese or special characters (such as spaces, &, =, etc.).
• Safely escape concatenated URLs during web crawling or front-end page navigation.
• Troubleshoot network request issues and restore complex encoded strings to readable plaintext.

Tool Features

• Dual-mode encoding: Supports encodeURIComponent (recommended, escapes special symbols such as &, ?, =) and encodeURI (preserves URL structure symbols).
• Smart decoding with fault tolerance: Automatically converts + to spaces and provides comprehensive exception capture; when invalid encoded strings are entered, friendly Chinese prompts are given to avoid page crashes.
• One-click copy result: Supports the Clipboard API in secure contexts and automatically degrades in unsupported environments, providing visual feedback after successful copying.
• Shortcut operations: Supports Ctrl + Enter shortcut to quickly trigger encoding, one-click input box clearing, improving work efficiency.