100% Client-Side Processing
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URL Encoder / Decoder
Encode and decode URLs and query parameters safely. Supports encodeURIComponent vs encodeURI modes and space handling as %20 or + for query strings.
Encoding
Decoding
How It Works
URL encoding (percent-encoding) converts special characters to %XX format for safe transmission in URLs. Our tool supports both encodeURIComponent and encodeURI modes with flexible space handling.
Step-by-Step Process:
- Paste your URL, query parameter, or text into the input field
- Choose encodeURIComponent for single values or encodeURI for full URLs
- Select space handling: %20 (standard) or + (form-encoded)
- Encode or decode instantly with client-side processing
Use Cases
URL encoding is essential for web development, API integration, and safe data transmission in web applications.
Query Parameters
Safely encode search terms, user input, and special characters in URL query strings for web applications and APIs.
API Integration
Prepare URLs and parameters for REST API calls, ensuring special characters don't break request formatting.
Web Development
Handle form data, redirect URLs, and dynamic link generation with proper character encoding for browsers.
Data Processing
Process URLs from logs, databases, or user input by safely decoding percent-encoded content.
Privacy Promise
URL data often contains sensitive information like search terms and user parameters. Our encoder ensures complete privacy.
🔒 Your data never leaves your browser - 100% client-side processing guaranteed
Frequently Asked Questions
When should I use encodeURIComponent vs encodeURI?
Use encodeURIComponent for individual values like query parameters, search terms, or path segments. Use encodeURI for complete URLs that already contain reserved characters (:/?#) that should remain functional.
What's the difference between %20 and + for spaces?
%20 is the standard percent-encoding for spaces in URLs. + is commonly used in HTML form query strings (application/x-www-form-urlencoded). Choose based on your target system's expectations.
Why do I get different results with different modes?
encodeURIComponent encodes more characters (including :/?#) while encodeURI preserves URL structure characters. The mode you choose depends on whether you're encoding a value or a complete URL.
Can I decode URLs safely?
Yes, decoding properly encoded URLs is safe. However, always validate decoded content before using it in your application, especially with user-provided URLs.
What happens with double encoding?
Double encoding occurs when you encode already-encoded content, turning % into %25. Always check if your data is already encoded before applying additional encoding.