What is URL encoding?

URL encoding (also called percent encoding) replaces unsafe characters in a URL with a '%' followed by two hexadecimal digits. For example, a space becomes %20 and an ampersand becomes %26. This ensures URLs are transmitted correctly across the internet.

What is the difference between encodeURI and encodeURIComponent?

encodeURI encodes a full URL but preserves characters like ':', '/', '?', and '&' that have special meaning in URLs. encodeURIComponent encodes everything except letters, digits, and a few special characters (- _ . ! ~ * ' ( )). Use encodeURIComponent for query parameter values, and encodeURI for complete URLs.

Yes! This tool runs entirely in your browser using JavaScript. No data is sent to any server. You can even use it offline once the page is loaded.

Can I encode multiple lines at once?

Yes! The tool supports multi-line input. Each line will be encoded or decoded independently, making it easy to process batch URLs or query strings.

Free Developer Tool

Encode & Decode URLs
Instantly

Paste any URL or text to encode special characters for safe URLs, or decode percent-encoded strings back to readable text. 100% client-side — your data never leaves your browser.

🔗

Instant Encoding

Encode special characters like spaces, ampersands, and Unicode into safe percent-encoded URLs.

🔓

One-Click Decode

Decode percent-encoded strings (%20, %3D, etc.) back to human-readable text instantly.

🛡️

100% Private

Everything runs in your browser. No data is sent to any server — fully offline-capable.

Encodes everything except: A-Z a-z 0-9 - _ . ! ~ * ' ( ). Best for query parameter values.

Input

0 characters

Output

0 characters

Common URL Encodings

Space%20

!%21

#%23

$%24

&%26

=%3D

?%3F

/%2F

@%40

+%2B

%%25

:%3A

Frequently Asked Questions

Everything you need to know about URL Encoder Decoder.