API Parameter Encoder
Encode parameters for REST API requests. Essential for building query strings with special characters, spaces, or international text in API URLs.
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URL Encoding Reference
→ %20
Space
& → %26
Ampersand
= → %3D
Equals
? → %3F
Question mark
/ → %2F
Forward slash
# → %23
Hash
+ → %2B
Plus
@ → %40
At sign
encodeURI vs encodeURIComponent
encodeURIComponent: Encodes all special characters including /, ?, &, =, #. Use for encoding URL parameter values.
encodeURI: Preserves URL structure characters (/, ?, &, =, #, :). Use for encoding entire URLs while keeping them valid.
encodeURIComponent("a=b&c=d") → "a%3Db%26c%3Dd"
encodeURI("a=b&c=d") → "a=b&c=d" (unchanged)
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Frequently Asked Questions
Why encode API parameters?
API parameters must be URL-encoded to handle special characters like &, =, spaces, and non-ASCII characters. Without encoding, these characters could break the URL structure.
Should I encode the entire API URL?
No, only encode the parameter values. The URL structure (protocol, domain, path separators) should remain unencoded. Use encodeURIComponent for each parameter value.
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