URL encoder

Free URL Encoder Tool

The Free URL Encoder converts text into safe, percent-encoded URLs so browsers and APIs interpret your data correctly. It prevents broken links and parameter errors by encoding reserved characters. Use it when adding query strings, passing user input in links, or integrating with web services that require RFC 3986-compliant encoding.

What is URL Encoder?

URL Encoder is a simple utility that converts characters into their percent-encoded equivalents so they can be safely transmitted in a URL. Characters like spaces, ampersands, question marks, and non-ASCII symbols can break links or change meanings. By encoding them, the tool ensures your URLs remain valid and unambiguous across browsers, servers, and APIs.

On Monkey Type, the URL Encoder follows standard percent-encoding conventions (RFC 3986) and UTF-8 character encoding. Spaces become %20, non-ASCII characters are encoded byte-by-byte, and reserved symbols like & and = are escaped so query parameters are preserved exactly as intended.

If you need to reverse the process, you can use the complementary URL Decoder. For marketers adding campaign parameters, the UTM Builder pairs well with the URL Encoder to produce clean, trackable links.

Why Use URL Encoder?

• Prevent broken links: Unencoded spaces or special characters can truncate URLs or produce 404 errors. Encoding ensures links work reliably in emails, documents, and chat apps. For related data-safety tasks, try the Base64 Encoder.
• Protect query parameters: When user input includes symbols like &, =, or #, encoding preserves parameter boundaries so your backend receives the correct values.
• Ensure API compatibility: Many APIs expect percent-encoded parameters. Encoding avoids signature mismatches, parsing errors, and rejected requests in integrations.
• Support international characters: Non-ASCII characters (e.g., accented letters, emojis) are safely transmitted via UTF-8 percent-encoding, making your app localization-friendly.
• Improve security and sanitation: Encoding reduces the risk of malformed URLs being interpreted incorrectly, especially when constructing links dynamically from user input. If you also sanitize HTML, consider the HTML Encoder.

How to Use URL Encoder on Monkey Type

1. Open the URL Encoder on Monkey Type.
2. Paste your full URL or the specific component (path or query string) you want to encode into the input field.
3. Select the scope if available:
   • Encode entire URL
   • Encode only query parameters
   • Encode a single value (recommended for form inputs)
4. Click Encode. The tool will convert unsafe characters to percent-encoded format using UTF-8.
5. Copy the encoded output and use it in your app, API call, or link.
6. To verify or undo the process, use the URL Decoder to round-trip the text and ensure accuracy.

Expected result: Your original text becomes a valid, shareable URL. For instance, a space becomes %20, “&” becomes %26, and emojis are encoded to their multi-byte sequence. If you need to inspect components of a complex link, the URL Parser can help.

Key Features

• Standards-compliant: RFC 3986-based percent-encoding with UTF-8 support.
• Partial or full encoding: Encode entire URLs or just values for query parameters.
• Smart detection: Avoids double-encoding of characters already encoded.
• Instant preview: See input and encoded output side by side for quick verification.
• One-click copy: Copy results without losing formatting or characters.
• Works with other tools: Combine with the URL Decoder and UTM Builder for complete link workflows.

Best Practices & Tips

• Encode only what’s necessary: Typically encode query parameter values, not the entire URL structure (scheme, host, and path segments) unless required.
• Avoid double-encoding: Do not encode text that already contains %xx sequences. Use the URL Parser to check before encoding.
• Keep characters consistent: Prefer %20 over + for spaces in query components to align with RFC 3986. Some systems treat + as a literal plus sign.
• Always use UTF-8: Ensure your system expects UTF-8 percent-encoding to handle international characters correctly on Monkey Type.
• Encode values, not delimiters: Delimiters like ? and & define URL structure. Encode the parameter values, not the delimiters themselves.
• Sanitize content sources: If your URL includes HTML or JSON fragments, sanitize them first using the HTML Encoder to avoid unintended interpretation.

Common Use Cases

• Marketing links: Encode UTM parameters to ensure every click is tracked correctly. Build campaigns with the UTM Builder.
• API requests: Safely pass user-entered search terms, filter values, or callback URLs in GET requests without breaking query strings.
• Internationalized content: Encode non-ASCII product names, city names, or personas to maintain correct characters across systems.
• Embedded links in documents: Prevent line breaks or special characters from corrupting links in PDFs, emails, or spreadsheets.
• QR codes and deep links: Encode destination URLs before generating scannable codes with the QR Code Generator.