Online URL Encoder & Decoder

Escape unsafe characters in URLs using Percent-Encoding. Secure your query strings and fix broken links instantly.

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Input

URL/Text

Output

The Grammar of the Web: Why Do We Need Percent-Encoding?

The internet relies on URLs to locate resources, but the URL syntax allows only a restricted set of ASCII characters. Any character outside this set—such as emojis, whitespace, or non-Latin alphabets—must be converted into a safe format to travel across the internet. URL Encoding (or Percent-Encoding) translates these unsafe characters into a `%` followed by two hexadecimal digits. For instance, a space becomes `%20`. Our tool automates this conversion, ensuring your links are valid, clickable, and correctly interpreted by browsers and servers worldwide according to RFC 3986 standards.

Protecting Query Strings and API Calls

For backend developers and API testers, passing data via URL parameters is a daily task. However, characters like `?`, `&`, `/`, and `=` have special meanings in a URL structure. If your data contains these reserved characters (e.g., a search query like "C++ & Java"), it can break the URL structure, causing the server to misinterpret the request. By running your parameters through our URL Encoder, you "escape" these characters (converting `&` to `%26`), ensuring the server treats them as literal text rather than control commands. This is critical for preventing data corruption in GET requests.

Decoding for SEO and Security Analysis

Often, you will encounter URLs in logs or analytics dashboards that look like a mess of percent signs and numbers. This is encoded text, often representing international characters or obfuscated redirects. Our "Decode" function reverses the process, revealing the original human-readable text. This is invaluable for SEO specialists auditing site structure, analyzing UTM parameters, or fixing broken redirects. Similarly, security professionals use decoding to inspect suspicious URLs found in emails or logs to uncover potential phishing attempts hidden behind encoded strings.

FAQ
In path segments of a URL, spaces should be encoded as `%20`. In query strings (specifically `application/x-www-form-urlencoded`), spaces are often encoded as `+`. Our tool defaults to the safer `%20` encoding.
Yes. Emojis and multi-byte characters are first converted to their UTF-8 byte sequence and then percent-encoded. For example, a smiley face 🙂 becomes `%F0%9F%99%82`.
No. If you encode the entire URL, the protocol (`https://`) and separators (`/`) will also be encoded, breaking the link. You should only encode the *values* of the query parameters.
Encoding increases the string length significantly. While the HTTP spec doesn't set a hard limit, most browsers and servers (like Chrome or Apache) cap URLs around 2,048 characters.
Absolutely. All encoding and decoding happen locally in your browser using JavaScript's native encoding libraries. Your data is never transmitted to our servers.