Developer Guide3 min read Updated August 24, 2026
URL Encoding & Percent-Decoding Guide
URLs can only contain ASCII character sets. Special characters like spaces, ?, &, and / must be percent-encoded to prevent broken HTTP links.
Quick Takeaway
Use URL Encoder/Decoder to convert plain text with spaces and symbols into percent-encoded URI strings (%20 for space, %26 for &) and vice versa.
Common Percent-Encoded Characters Reference
Space → %20 | Forward Slash (/) → %2F | Question Mark (?) → %3F | Ampersand (&) → %26 | Equals (=) → %3D
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Frequently Asked Questions
What is the difference between encodeURI and encodeURIComponent?↓
encodeURI preserves URL structure (keeps :// ? &), while encodeURIComponent encodes every special character for query parameter safety.