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ProWebTools v2.0
Free Online Developer Utilities
Web Standard

Online URL Encoder & Decoder

Safely encode special characters into percent-encoded (%20, %26) URI components or decode encoded URLs back to human-readable strings.

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Preventing URL Encoding Bugs in Modern Web Applications

When passing query strings or UTM parameters across web servers, characters like &, =, ?, and spaces can break URL parsing if not properly encoded.

This tool uses strict RFC 3986 encoding to ensure clean parameter passing between clients and servers.

Frequently Asked Questions

What is percent-encoding in URLs?

URLs can only be sent over the internet using the ASCII character-set. Special characters like spaces, question marks, and ampersands must be replaced with a "%" followed by two hexadecimal digits.

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