Web Security · Developer Tool · UTF-8

URL Encoder & Decoder

Convert special characters into web‑safe formats instantly. Perfect for developers and SEO professionals fixing broken links or handling sensitive query parameters.

Updated: October 5, 2026 Built by Khalil Rahman 100% client-side
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Web Security Utility

URL Encoder / Decoder

0 characters 0 lines
Result will appear here…
0 characters
Examples:

Paste a complete URL to break it down into its components:

Protocol—
Host—
Port—
Path—
Query String—
Hash—

Encode or decode many lines at once. One item per line.

Your last 10 encode/decode operations (stored locally in your browser).

  • No history yet. Start encoding or decoding to see your operations here.

Common characters and their percent-encoded equivalents:

CharacterNameEncoded
  (space)Space%20
!Exclamation%21
#Hash / Fragment%23
$Dollar%24
&Ampersand%26
+Plus%2B
=Equals%3D
?Question mark%3F
/Forward slash%2F
:Colon%3A
@At sign%40
€Euro sign%E2%82%AC

All processing happens locally — your data never leaves your device.

100% Private & Secure: All encoding and decoding happens locally in your browser via JavaScript. No data is ever sent to any server — ideal for sensitive API keys, tokens, or private parameters.

How to Use This Tool

1

Select Encode or Decode

Choose Encode to convert special characters into percent‑encoded format, or Decode to revert encoded strings back to readable text.

2

Enter Your Text

Type or paste your URL or string into the input field. The tool processes it automatically as you type — no need to click any button.

3

Copy, Download, or Share

Copy the result to your clipboard, download it as a text file, or generate a shareable link that reproduces the same operation on any device.

4

Go Further with Advanced Tools

Use the URL Parser to break down a URL into components, Batch Mode to process many lines at once, or check the Encoding Reference for common character codes.

Why Use a URL Encoder/Decoder?

Fix Broken Links

URLs with spaces or special characters (&, ?, #) often break in browsers, emails, or markdown. Encoding makes them reliable everywhere.

Safe Query Parameters

Pass values safely through APIs — encode user input before adding it to a query string to prevent injection issues.

UTF-8 & Emoji Ready

Arabic, Urdu, Chinese, Cyrillic, and emojis are all percent‑encoded correctly for cross‑browser compatibility.

Instant, Offline-Friendly

Runs entirely in your browser using vanilla JavaScript. Even works if your internet drops after the page loads.

Two Encoding Modes

Choose encodeURIComponent for query parameter values, or encodeURI to preserve URL structural characters.

Batch Processing

Encode or decode many URLs at once — great for migrating data or processing log files.

encodeURI vs encodeURIComponent

CharacterencodeURIencodeURIComponent
: / ? #PreservedEncoded
& = +PreservedEncoded
Space%20%20
Letters, digitsPreservedPreserved
Best for…Encoding a full URL as a single stringEncoding individual query parameter values

Frequently Asked Questions

URLs can only be sent over the Internet using the ASCII character‑set. Encoding converts unsafe characters (spaces, symbols, non‑ASCII) into a format that browsers and search engines interpret correctly, preventing 404 errors and broken links.
Absolutely. All processing is done locally in your browser using JavaScript. No data is ever sent to our servers, making it ideal for developers handling sensitive API keys, tokens, or private parameters.
encodeURI preserves characters like : / ? # @ & = that have special meaning in a full URL. encodeURIComponent encodes everything except A‑Z a‑z 0‑9 - _ . ! ~ * ' ( ), making it suitable for query parameter values.
Yes. The tool fully supports UTF‑8 and multi‑byte characters such as Chinese, Arabic, Urdu, and emojis. Special characters are correctly percent‑encoded for web transmission.
Yes. Open the Batch Mode tab in the Advanced Tools section. Paste one URL per line and click "Encode All" or "Decode All" to process them simultaneously.
A URL Parser breaks a complete URL into its components — protocol, host, port, path, query string, and hash fragment. This is useful for debugging, security audits, or building tools that manipulate URLs programmatically.
Your last 10 operations are stored locally in your browser using localStorage. They never leave your device. You can clear the history anytime from the History tab.
Once the page has fully loaded in your browser, the encoding and decoding logic continues to work even if your internet connection drops — because it runs entirely in JavaScript. Only the initial page load requires a connection.
⭐ Rate This Tool
Reviewed and maintained — The encoding logic uses standard browser APIs (encodeURI, encodeURIComponent, decodeURI, decodeURIComponent) which conform to RFC 3986. Found a bug? Send us the test case. Last reviewed: October 2026.
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