Uses browser-native encodeURIComponent(), decodeURIComponent(), encodeURI(), and decodeURI(). The key distinction: encodeURI is for full URLs (leaves :/?# alone), while encodeURIComponent is for query parameters (encodes everything reserved). Handles the space vs + thing correctly depending on whether you're in a query string or not.
URL Encoder/Decoder
Encode and decode URLs instantly. Parse URL parameters, components, and query strings. Free online URL tool for developers.
Common Characters Reference
Space
%20
!
%21
"
%22
#
%23
$
%24
%
%25
&
%26
'
%27
(
%28
)
%29
*
%2A
+
%2B
,
%2C
/
%2F
:
%3A
;
%3B
=
%3D
?
%3F
@
%40
Chinese
%E4%B8%AD%E6%96%87
Frequently Asked Questions
Quick answers to common questions
What URL operations can I perform?
You can encode and decode URLs (converting special characters to/from percent-encoding), parse URL components (protocol, domain, path, query parameters, fragment), and validate URL format. Perfect for working with APIs and web links.
When should I use URL encoding?
Use URL encoding when including special characters, spaces, or non-ASCII characters in URL query parameters. For example, spaces become %20, and characters like é become %C3%A9. This ensures URLs are properly transmitted.
Can I extract query parameters from URLs?
Yes! The parser extracts all query parameters and displays them as key-value pairs. You can see individual parameters and their values, making it easy to analyze or modify complex URLs with multiple parameters.
Is my URL data private?
Absolutely. All URL processing happens locally in your browser. Your URLs and any sensitive information they contain are never sent to any server.
Does the tool validate URLs?
Yes! The tool validates URL format and checks for common errors. It will indicate if a URL is malformed or missing required components like protocol or domain.
View Complete Guide & Tutorials
Explore advanced techniques and best practices
Use Cases
Discover how to integrate this tool into your workflow
Web Development
Encode and decode URLs for web applications and APIs.
- URL parameter encoding
- Query string formatting
- Link validation
- API endpoint testing
SEO Optimization
Analyze and optimize URL structures for search engines.
- URL structure analysis
- Parameter identification
- Canonical URL check
- Link cleanup
Data Integration
Handle URL encoding in data feeds and integrations.
- Feed URL encoding
- Integration testing
- Parameter parsing
- Link tracking setup
About This Tool
URL encoding is one of those things that's easy to mess up. This tool handles URL encoding (full URL) and component encoding (just the query parameters)—subtle difference that matters. Perfect for building API requests, debugging why your URLs aren't working, or figuring out what those <code>%20</code> things actually mean. Spaces can be <code>%20</code> or <code>+</code> depending on context, and this tool knows when to use which.
Technical Details
Algorithm
URL encoding converts characters to UTF-8 bytes, then represents each byte as %XX hex. Reserved characters like ?&= have special meaning in URLs so they get encoded. Spaces get tricky—%20 in most places, but + in query strings (application/x-www-form-urlencoded). This tool handles that automatically so you don't have to remember the rules.
Privacy Commitment
🔒 **Privacy First**: Unlike server-based tools, AI-TOL processes everything locally in your browser - your data never leaves your device. No uploads, no tracking, completely private.