Question 1

What is URL encoding?

Accepted Answer

URL encoding, also called percent-encoding, replaces unsafe characters with % followed by two hex digits so they can be safely used in URLs.

Question 2

What characters need to be URL encoded?

Accepted Answer

Spaces, &, =, ?, #, +, non-ASCII characters, and other reserved URI characters all need to be percent-encoded when used in URL components.

Question 3

What's the difference between encodeURI and encodeURIComponent?

Accepted Answer

encodeURI preserves URI structure characters like /, ?, and #. encodeURIComponent encodes everything — use it for individual query parameter values.

URL Encoder & Decoder

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