Why does decoding sometimes fail with an error?

This happens when the input contains a malformed % sequence that isn't valid percent-encoding.

It represents a single space character in percent-encoded text.

Can I decode a value that was encoded twice?

Yes — run it through the decoder twice, once for each layer of encoding.

Is my text uploaded anywhere?

No — decoding happens entirely in your browser.

What is the difference between the two decode modes?

Component mode decodes every percent-encoded character; full-URL mode preserves the meaning of structural characters like : and /.

Does this work with non-English characters?

Yes — encoded UTF-8 byte sequences are decoded back into their original characters.

Encoding Tools

URL Decoder

Paste a percent-encoded string — such as a query parameter — and decode it back into readable text.

Start Using This Tool

Runs in Your Browser
Instant Results
100% Private

Your Text

Mode

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What Is URL Decoding?

URL decoding reverses percent-encoding, converting %XX sequences back into their original characters — turning "hello%20world" back into "hello world", for example.

It is useful whenever you have a URL or query string copied from a browser's address bar, server log, or API response and want to read its actual, human-readable content.

Who Uses This Tool?

For Business

Decode a tracking parameter copied from a marketing URL.

For Personal Use

Read the actual content of a long, encoded link.

For Students

Learn how percent-decoding works for a web development course.

For Offices

Decode a query string copied from a server access log.

Why Use This Tool

Key Features

Two Decoding Modes

Decode as a single component or as a full URL.

Instant Decoding

Output updates immediately as you paste in encoded text.

100% Private

Your text is never uploaded or stored.

One-Click Copy

Copy the decoded result straight to your clipboard.

The Payoff

Benefits

Read Encoded URLs Instantly

See the real, human-readable content behind a percent-encoded string.

Clear Error Messages

Malformed encoding is reported clearly instead of failing silently.

No Software Needed

Decode directly in the browser — no command line required.

Step by Step

How to Use URL Decoder

Paste the Encoded Text

Add the percent-encoded string or URL.

Read the Decoded Result

The original text appears automatically.

Copy the Result

Use the Copy button to grab the decoded text.

Specifications

Technical Details

Detail	Value
Input	Percent-encoded text or full URLs
Processing	No practical limit — handled entirely by your browser
Output	Exact decoding using the browser's native decodeURIComponent/decodeURI

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Privacy & Security

What actually happens to your file when you use this tool.

100% Client-Side

This tool runs entirely inside your browser using JavaScript — nothing you type or generate is ever sent anywhere.

No Upload, Ever

There is no file upload and no server processing step — your data never leaves your device.

Works Offline

Once this page has loaded, the tool keeps working even without an internet connection.

Nothing Stored

Nothing you enter is saved on our servers — refreshing the page clears everything.

No Tracking of Your Input

We have no way to see what you type, generate or convert with this tool.

Get Better Results

Tips

Use Full-URL Mode for Complete Links

Switch modes if component decoding reports an error on a full URL.

Check for Double-Encoding

If the result still contains %XX sequences, the text may have been encoded twice — decode it again.

Frequently Asked Questions