URL Encoder/Decoder
Encode and decode URLs with percent-encoding for safe transmission. Handle special characters, files, and advanced options. Safe, fast, and completely free.
Encode to URL-encoded Format
Enter your text below to encode it using percent-encoding. Perfect for making URLs safe with special characters.
Decode from URL-encoded Format
Enter your URL-encoded string below to decode it back to readable text.
File URL Encoder/Decoder
Upload files to encode to URL format or decode URL-encoded files back to their original format.
Click or drag files here
Maximum file size: 10MB
About URL Encoding
Safe URL Transmission
URL encoding (percent-encoding) converts special characters to a safe format for transmission over the internet in URLs and forms.
Universal Standard
Used worldwide in web applications, APIs, and forms to ensure special characters don't break URL structure or cause errors.
Multiple Use Cases
Essential for query parameters, form data, API endpoints, and any URL containing spaces or special characters.
RFC Standards
Follows RFC 3986 specifications for URI syntax, ensuring compatibility with all web browsers and servers.
URL Encoding Technical Details
Reserved Characters
Characters with special meaning in URLs that must be encoded when used as data:
Common Characters
Frequently encoded characters in URLs and form data:
Unreserved Characters
These characters don't need encoding:
Percent Encoding
Format: %XX where XX is the hexadecimal ASCII value
Best Practice
Use encodeURIComponent() for query parameters and form data
URL Encoder/Decoder Features
Lightning Fast
Process large files and text instantly with optimized encoding/decoding algorithms.
100% Secure
All processing happens in your browser. No data is sent to our servers.
File Support
Upload and process files of any type up to 10MB in size.
Advanced Options
Component encoding, chunking, and multiple character set support.
Mobile Friendly
Works perfectly on all devices and screen sizes.
Download Results
Save your encoded/decoded results as files for later use.
URL Encoder/Decoder FAQ
What is URL encoding?
URL encoding (percent-encoding) is a mechanism for encoding information in URLs by replacing unsafe characters with percent signs followed by hexadecimal digits.
When should I use URL encoding?
Use URL encoding when URLs contain spaces, special characters, or non-ASCII characters that need to be safely transmitted over HTTP.
What's the difference between encoding and component encoding?
Component encoding is safer for URL parameters as it encodes all reserved characters, while regular encoding may leave some characters unencoded.
Are URLs case-sensitive when encoded?
The hexadecimal digits in percent-encoding are case-insensitive, but URLs themselves may be case-sensitive depending on the server.
What characters don't need encoding?
Unreserved characters (A-Z, a-z, 0-9, -, _, ., ~) don't need encoding and should be left as-is for optimal compatibility.
Can I process large files?
Yes, our tool supports files up to 10MB. Processing happens in your browser for security and privacy.