Codificador/Decodificador URL

Codifique caracteres especiais em URLs para torná-los seguros para transmissão, ou decodifique strings URL-encoded de volta à sua forma original.

What is URL Encoding?

URL encoding, also known as percent encoding, is a method to encode special characters in URLs to make them safe for transmission over the Internet. When you need to include special characters, spaces, or non-ASCII characters in a URL, they must be encoded using this standard. The URL encoder replaces unsafe characters with a percent sign (%) followed by two hexadecimal digits representing the character's ASCII code. This ensures that URLs remain valid and can be correctly interpreted by web servers and browsers worldwide.

How to Use This Free URL Encoder Tool

Our online URL encoder is designed for simplicity and efficiency. To encode a URL or text string, paste your content into the input field and click either "URL Encode" for full URLs or "Encode Component" for URL parameters and query strings. The encoded result appears instantly in the output field. To decode a URL-encoded string, simply paste the encoded text and click "URL Decode". All processing happens instantly in your browser, ensuring your URLs and data remain completely private. Perfect for web developers, API developers, and anyone working with query strings and URL parameters.

URL Encode vs Encode Component: Understanding the Difference

Our tool offers two encoding methods to match your specific needs:

  • URL Encode (encodeURI): Use this to encode complete URLs. It preserves URL protocol characters like colons (:), slashes (/), question marks (?), ampersands (&), and equals signs (=). This method is perfect when you need to encode a full URL while keeping its structure intact.
  • Encode Component (encodeURIComponent): This method encodes all special characters including URL protocol characters. Use this when encoding individual URL components like query parameters, path segments, or form data. This is the most commonly used method for encoding user input in query strings.

Common URL Encoding Examples

Here are the most frequently encoded characters you'll encounter:

  • Space → %20 or + (in query strings)
  • ! (exclamation) → %21
  • # (hash/pound) → %23
  • $ (dollar) → %24
  • % (percent) → %25
  • & (ampersand) → %26
  • = (equals) → %3D
  • ? (question mark) → %3F
  • @ (at symbol) → %40

When Do You Need URL Encoding?

  • Query String Parameters: When passing data through URL parameters, encode values to prevent breaking the URL structure with special characters
  • Form Data Submission: HTML forms with GET method require URL encoding for submitted data
  • API Requests: Many REST APIs require URL-encoded parameters in GET requests
  • Search Queries: Search terms containing spaces and special characters must be encoded
  • File Names in URLs: When referencing files with spaces or special characters
  • Internationalization: Non-ASCII characters like Chinese, Arabic, or emoji need URL encoding
  • Email Links: Mailto links with subject lines and body text require URL encoding

Why Use Our Online URL Encoder?

  • 100% Free: No registration required, unlimited usage, completely free forever
  • Privacy Protected: All URL encoding and decoding happens in your browser - your URLs never leave your device
  • Lightning Fast: Instant encoding and decoding with no server delays
  • Two Encoding Methods: Choose between encodeURI and encodeURIComponent based on your needs
  • Developer-Friendly: Perfect for web developers, API developers, and QA testers
  • Mobile Compatible: Works seamlessly on smartphones and tablets
  • No Installation: Use directly in your browser, no software to download

URL Encoding Best Practices

When working with URL encoding, follow these best practices: Always encode query parameter values, never encode the entire URL if it already contains encoded components (this causes double-encoding issues), use encodeURIComponent for individual parameters and encodeURI for complete URLs, remember that the plus sign (+) in query strings represents a space, and always test your encoded URLs to ensure they work correctly.

Frequently Asked Questions About URL Encoding

What's the difference between URL encoding and percent encoding?
They're the same thing! Percent encoding is the technical name because it uses the percent sign (%) to encode characters. URL encoding is the more commonly used term.

Should I encode an entire URL or just the parameters?
Use "Encode Component" (encodeURIComponent) for individual query parameters and values. Use "URL Encode" (encodeURI) only when encoding a complete URL that's already properly formatted.

Why do some URLs have %20 and others have + for spaces?
Both are valid. %20 is the standard URL encoding for space. The + sign is a shorthand that's commonly used in query strings (the part after the ? in a URL).

Can I decode multiple times?
Be careful with double-decoding! If you decode an already decoded URL, you might get incorrect results. Only decode once unless you know the URL was encoded multiple times.

Is URL encoding the same as Base64 encoding?
No, they're completely different. URL encoding (percent encoding) converts special characters for URL transmission. Base64 is a binary-to-text encoding scheme. Use the right tool for your specific need.

Do I need to encode URLs for AJAX requests?
Yes! When making AJAX requests with query parameters, always encode parameter values using encodeURIComponent to prevent errors and security issues.