Instantly encode text and special characters for safe URL transmission or decode percent-encoded strings back to readable text. URL encoding (also called percent encoding) is essential for safely passing data through URLs, query parameters, and API requests. Whether you're building web applications, working with APIs, debugging URL parameters, or handling international characters and emoji, this tool makes encoding and decoding simple and instant. This tool supports full UTF-8 and Unicode character encoding, handles international text seamlessly, and performs all operations securely in your browser—no data ever touches our servers. Perfect for developers, DevOps engineers, and anyone working with URLs and web APIs. No registration required—start encoding now!
URL encoding is a fundamental technique in web development that converts special characters into a format safe for transmission through URLs. This tool provides fast, reliable encoding and decoding for URLs, query parameters, API requests, and any situation where you need to safely transmit text through URLs. Whether you're debugging API calls, building web applications with dynamic parameters, handling international content, or working with form data, URL encoding is essential. This tool simplifies the process with an intuitive interface, instant results, and complete privacy—all processing happens entirely in your browser.
Method 1: Encode Text for URLs
Method 2: Decode URL-Encoded Strings
Keyboard Shortcuts (Power Users)
Pro tip: When debugging URLs from browser history or logs, paste the entire URL and decode it to see the original query parameters and values clearly.
Building Dynamic API Requests with Query Parameters
When building REST APIs or web applications that accept query parameters, special characters in values like search queries, user names, or descriptions must be URL-encoded. For example, if a user searches for "hello world" in your app, you need to encode it as "hello%20world" (or "hello+world") before adding it to a URL like "https://api.example.com/search?q=hello%20world". This tool makes encoding parameter values simple—just paste the value and encode it to get the proper format for your URL.
Debugging and Inspecting URLs from Logs and Browser History
When working with logs, browser history, or API debugging tools, URLs often appear in encoded format making them difficult to read. Decode the URL to see the actual parameter values and understand what data was transmitted. For example, an encoded URL might look like "https://example.com/search?q=python%20programming&sort=date%20desc", but decoding it reveals the original values "python programming" and "date desc", making it much easier to debug issues or verify data transmission.
Handling International Characters and Emoji in URLs
Modern web applications need to support international content and emoji in URLs. Characters like é, ñ, 中文, or emoji aren't safe in URLs and must be encoded. This tool handles UTF-8 encoding automatically, converting international text and emoji to their percent-encoded equivalents. This is essential for global applications, multilingual search, and modern APIs that accept emoji or international user input in URLs.
Form Data and POST Parameters
When submitting HTML forms via GET requests or building form-encoded data for APIs, form field values containing special characters, spaces, or punctuation must be properly URL-encoded. This tool ensures values are correctly encoded before being added to URLs or form data. For example, a form field value "John O'Neill & Co." must be encoded as "John%20O%27Neill%20%26%20Co." to be transmitted safely through URLs.
Q: What's the difference between encoding and escaping?
A: Encoding and escaping are related but different concepts. Escaping refers to adding special characters (usually backslashes) to represent characters that have special meaning in a context. URL encoding (percent encoding) converts characters to %XX format where XX is the hexadecimal character code. URL encoding is specifically about making URLs safe for transmission, while escaping is a broader term used in many programming contexts. This tool performs URL encoding, which is the proper method for making URLs safe.
Q: When should I use encodeURI vs encodeURIComponent?
A: encodeURI is used to encode an entire URL (protocol, domain, path) and preserves special characters like :/?#[]@!$&'()*+,;= that have meaning in URLs. encodeURIComponent is used to encode individual URI components (query parameters, fragment identifiers) and encodes all special characters. Use encodeURIComponent when encoding query parameters or values within URLs. This tool uses encodeURIComponent, which is appropriate for encoding individual values that will be used as query parameters or in other URL components.
Q: Why do spaces sometimes become + and sometimes %20?
A: Both %20 and + represent spaces in URLs, but in different contexts. In query strings (application/x-www-form-urlencoded), spaces become +. In other URL components and percent encoding generally, spaces become %20. This tool outputs %20 which is the standard URL encoding format. When parsing URLs in different contexts, your server may handle both + and %20 as spaces depending on how it decodes the URL.
Q: What characters need to be URL encoded?
A: Reserved characters (: / ? # [ ] @ ! $ & ' ( ) * + , ; =), unsafe characters (space, quotes, angle brackets), and characters outside ASCII range (accents, emoji, non-Latin scripts) all require URL encoding. Additionally, the percent sign (%) itself must be encoded as %25 to avoid confusion with the encoding format. Letters (A-Z, a-z), digits (0-9), hyphen (-), underscore (_), period (.), and tilde (~) are unreserved and don't need encoding. This tool automatically handles encoding all characters that need it.
Q: Can I encode international characters and emoji?
A: Yes! This tool fully supports UTF-8 encoding of international characters, emoji, and any Unicode symbols. Characters like é, ñ, 中文, 日本語, and emoji are automatically converted to their UTF-8 byte representation and then percent-encoded as %XX sequences. This is essential for URLs containing non-English content, international domain names, and modern web applications that handle global data.
Q: Is URL encoding the same as encryption?
A: No, URL encoding is not encryption and provides no security. It's simply a way to represent special characters in a format safe for URLs. Anyone can easily decode %20 to a space or %3D to an equals sign. If you need to protect sensitive data in URLs, use HTTPS (which encrypts the entire connection) rather than relying on URL encoding. URL encoding is about format compliance, not security.
This tool encodes the following character categories:
Unreserved characters that do NOT need encoding: A-Z, a-z, 0-9, hyphen (-), underscore (_), period (.), and tilde (~).