URL Decoder: Decode Percent-Encoded URLs

Decode any encoded URL instantly with our free URL Decoder tool. Understand what's hidden behind the percent signs in web addresses. Simply paste the encoded URL and see the human-readable result.

URL Decoder

Decode percent-encoded URLs back to original text

Encoded URL

Common URL Encodings

%20

Space

%21

Exclamation mark (!)

%26

Ampersand (&)

%3D

Equals sign (=)

%3F

Question mark (?)

%2F

Forward slash (/)

How It Works

This URL decoder reverses percent-encoding, converting encoded URLs back to their original, human-readable form for easier inspection and debugging.

The decoding process:

Pattern recognition: The tool identifies percent-encoded sequences (%XX where XX is hexadecimal).
Byte conversion: Each %XX sequence is converted back to its original character using the ASCII/UTF-8 value.
Plus sign handling: In query strings, + characters are converted to spaces (legacy form encoding convention).
UTF-8 reconstruction: Multi-byte sequences are properly combined to reconstruct non-ASCII characters.

For example, "Hello%20World%21" decodes back to "Hello World!" - making it easy to read and understand what the URL actually contains.

When You'd Actually Use This

Debugging URL Parameters

Read encoded query parameters to understand what data is being passed in URLs.

Analyzing Tracking Links

Decode marketing URLs to see the actual UTM parameters and tracking data.

Security Investigation

Reveal hidden content in suspicious URLs that may be obfuscated through encoding.

API Response Analysis

Decode URLs returned by APIs to understand the actual endpoints and parameters.

Log File Analysis

Make server logs readable by decoding the encoded URLs in access logs.

Reverse Engineering

Understand how applications construct URLs by decoding and analyzing the patterns.

What to Know Before Using

Decoded URLs may contain dangerous content

Malicious URLs often use encoding to hide their true destination. Decoding reveals the actual target - be cautious about visiting decoded URLs from untrusted sources.

Double-encoded URLs exist

Some URLs are encoded multiple times (%2520 instead of %20). You may need to decode multiple times to get the final result.

Invalid encoding causes errors

Malformed percent sequences (%ZZ where ZZ isn't valid hex) will cause decoding errors. The tool will indicate where problems occur.

Context affects decoding

Query strings treat + as space, but path segments don't. The tool uses standard decoding that works for most cases.

Some encoding is intentional

URLs may be encoded to prevent manipulation or for security reasons. Decoding doesn't make them safe to modify or use.

Common Questions

Why are URLs encoded in the first place?

URLs are encoded to safely transmit special characters that have meaning in URL syntax. Without encoding, characters like spaces, ampersands, and question marks would break the URL structure.

Is it safe to click decoded URLs?

Decoding itself is safe - it just reveals what's there. But the decoded URL might lead to malicious sites. Always verify the destination before visiting, especially for URLs from untrusted sources.

What does %20 mean in a URL?

%20 represents a space character (ASCII code 32 in hex is 20). It's the most common encoding you'll see in URLs since spaces aren't allowed in raw form.

Can I re-encode a decoded URL?

Yes, use a URL encoder tool. However, be aware that encoding and decoding aren't always perfectly reversible if the original had non-standard encoding.

Why do some characters stay encoded after decoding?

Some characters must remain encoded to preserve URL structure. If everything decoded, the URL might become invalid. The tool preserves necessary encoding.

How do I decode URLs in my browser?

Browser consoles can decode with decodeURIComponent(). Bookmarklets and extensions also exist. This tool provides a simple interface without installation.

What's the difference between URL decoding and HTML decoding?

URL decoding handles %XX sequences. HTML decoding handles &entity; sequences like & and <. They're different encoding systems for different contexts.

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