URL Encoder & Decoder — Free Online URL
Encoding Tool

You click a tracking link from an email campaign and the URL looks like a wall of %20, %3F, and %26 — completely unreadable. Or you need to build a clean query string that won't break the moment someone types an ampersand. Either way, you need a reliable url encoder and decoder that handles both jobs without a page reload. That's exactly what this tool does — instantly, right inside your browser.

What Is URL Encoding?

URL encoding — better known as percent-encoding — is the method of representing characters that are not safe inside a web address. Every unsafe character is replaced by a percent sign followed by its two-digit hexadecimal value. A space becomes %20, an ampersand becomes %26, and a question mark becomes %3F. Arabic or other international characters are converted to their multi-byte UTF-8 sequences first, then each byte is percent-encoded — so the letter م alone becomes %D9%85.

This online percent encoding tool follows the rules defined in RFC 3986 (Percent-encoding on Wikipedia), which means the output is compatible with every modern browser and HTTP server. Without it, a single stray space or special character can silently break a link or cause a server to reject the request entirely. Next: when do you actually need to do this?

When Should You Encode or Decode URLs?

There are two distinct workflows. When you encode url online free, you are preparing text for safe travel inside a URL. Common triggers:

• Building UTM campaign links that contain spaces or special characters in the utm_content parameter.
• Passing form values to a REST API where the payload contains &, =, or ?.
• Embedding international text in an href attribute without breaking the HTML.

When you need to decode url online free, you are going the other way — turning an encoded string back into something readable. You'll hit this when:

• Reading raw server access logs full of percent sequences.
• Pulling encoded redirect URLs out of a database to inspect or edit them.
• Auditing UTM parameters on links before sharing them with a client.

Quick example: the Arabic phrase "مرحباً بالعالم" encodes to %D9%85%D8%B1%D8%AD%D8%A8%D8%A7%D9%8B%20%D8%A8%D8%A7%D9%84%D8%B9%D8%A7%D9%84%D9%85. Paste that into the Decode field and you get the original phrase right back. Here's how the tool handles all of it.

How This Free URL Encoder/Decoder Works

The workflow is designed to take zero learning time. Paste any text or URL into the input box — whether you want to url encode decode or just convert text to url encoding — and press the relevant button:

Two utility buttons keep the flow smooth: Clear wipes both fields in one tap, and Copy places the result on your clipboard without you having to select text manually. If you accidentally paste a malformed sequence — say %ZZ, which isn't valid hexadecimal — the tool flags the error inline instead of silently returning garbage output.

Full UTF-8 support means every script works correctly: Latin, Arabic, Chinese, Cyrillic, emoji. No character set switching, no configuration. Just paste and go.

Common Use Cases for URL Encoding

• Marketing campaign links — Encode complex UTM parameter values that contain spaces, commas, or slashes so tracking platforms don't misread them.
• REST API calls — When a query value contains reserved characters like & or ?, encoding prevents the server from misinterpreting them as part of the URL structure.
• Webhook payloads — Incoming webhooks often arrive with percent-encoded bodies. Decode them instantly before processing or logging.
• Internationalized query strings — Embed Arabic, Japanese, or any other non-ASCII text in a URL parameter without corrupting the link.
• Broken-link repair — Fix mangled URLs found in analytics exports or redirect rules by decoding them, editing the plain text, then re-encoding cleanly.

Once your URL is properly encoded, you may also need to format the HTML that carries it. Our HTML Formatter will tidy up the markup in seconds. And if you want to see how the link will actually render in a page before publishing, try the Preview HTML code online tool — paste your snippet and see the live result instantly.

Your Data Stays Private

Every encoding and decoding operation runs entirely inside your browser using JavaScript. Nothing you type is ever transmitted to a server — there is no backend, no database write, and no analytics event tied to your input. Close the tab and the data is gone. This matters when you're working with sensitive query parameters, API keys embedded in URLs, or private campaign data. For the full technical definition of what gets encoded and why, see the MDN Glossary entry on Percent-encoding.

Common Questions About URL Encoding