URL Encoder – Complete Guide & Free Online Tool
A URL encoder converts special characters into percent-encoded sequences so text can be safely placed in URLs and query parameters. Free online tool included.
Published 2026-09-13
What is URL Encoder?
A URL encoder converts special characters into percent-encoded sequences so text can be safely placed in URLs and query parameters.
What is URL encoding?
Characters that are unsafe in URLs — spaces, &, ?, #, and non-ASCII characters — are replaced with a % followed by their hex code. Component encoding also encodes reserved characters like /.
When to encode
Encode query parameter values to prevent breaking URLs, and encode user input before adding it to links.
Key Features
• Percent-encoding • Component and full-URL modes • Local processing
Examples
• hello world becomes hello%20world.
Common Use Cases
• Building query strings • Encoding user input • API requests
Tips & Best Practices
• Use component encoding for individual parameter values.
Limitations
• Encoding full URLs can double-encode existing % sequences.
External Resources
RFC 3986: URI