🔗 URL Encoder & Decoder

URL Encoding Reference

Common characters and their percent-encoded equivalents:

What is URL Encoding?

URL encoding (also called percent-encoding) converts characters into a format that can be safely transmitted over the internet. URLs can only contain a limited set of characters from the ASCII character set. Characters outside this set, or reserved characters with special meanings in URLs, must be encoded.

When to Use URL Encoding

• Query string parameters — Values in ?key=value&key2=value2
• Form data — When submitting forms with application/x-www-form-urlencoded
• Path segments — Special characters in URL paths
• Non-ASCII characters — Unicode characters like emojis, accented letters
• API requests — Parameters in REST API calls

encodeURIComponent vs encodeURI

In JavaScript:

• encodeURIComponent() — Encodes everything except: A-Z a-z 0-9 - _ . ! ~ * ' ( )
• encodeURI() — Preserves URL structure characters: : / ? # [ ] @ ! $ & ' ( ) * + , ; =

This tool uses encodeURIComponent() by default, which is the safest choice for encoding query parameters.

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