Input
Output
Query String Parser
💡 What does this do?
Parse a URL's query parameters (the part after ?) into an editable table. Perfect for:
- 🔍 Analyzing API URLs: See all parameters clearly
- ✏️ Editing parameters: Change values without manual encoding
- 🔗 Building URLs: Add/remove parameters visually
- 🐛 Debugging: See what data you're sending to APIs
Example: Paste an API URL like https://api.example.com/search?q=test&page=2&limit=10 and edit the parameters in the table below!
Enter Full URL
Batch Processing
Understanding URL Encoding
🔗 What is URL Encoding?
URL encoding (percent-encoding) converts special characters into a format that can be transmitted over the internet. Spaces become %20, @ becomes %40, etc.
It's also called "percent encoding" because special characters are represented as % followed by two hexadecimal digits.
🎯 When to Use URL Encoding
- Query parameters:
q=hello world→q=hello%20world - Special characters:
@,#,&,= - Form data: Submitting forms with special characters
- API requests: Passing parameters with spaces or symbols
- Passing URLs: Using URLs as parameter values
⚠️ Reserved Characters
These characters have special meaning in URLs and should be encoded:
&(separator) →%26=(assignment) →%3D?(query start) →%3F#(fragment) →%23/(path separator) →%2F%20or+
💡 Common Mistakes
- ❌ Encoding the entire URL (breaks structure)
- ❌ Double-encoding (encoding already encoded text)
- ❌ Forgetting to encode query parameter values
- ✅ Encode only the values, not the structure
- ✅ Use
encodeURIComponent()for values - ✅ Use
encodeURI()for full URLs