Free URL Encoder & Decoder | Percent-Encoding for Web URLs

Free URL Encoder & Decoder

Convert special characters in URLs to percent-encoded format and back. Instant, private, and browser-based.

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Mr-Tafi Developer

Built by Mr-Tafi

Full-stack developer & SEO specialist. I build privacy-first tools that run entirely in your browser.

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Try the URL Encoder Above

Paste a URL or text string, choose encode or decode mode, and click Process. The tool handles full URLs, query parameters, and individual components.

What Exactly Does This Tool Do?

This URL Encoder and Decoder handles all your percent-encoding needs. Here is what it offers:

  • Encode text: Convert any string to percent-encoded format for safe URL transmission.
  • Decode text: Convert percent-encoded strings back to readable text.
  • Full URL mode: Encode only query parameters while preserving the URL structure (protocol, domain, path).
  • Component mode: Encode every special character including slashes and colons.
  • Unicode support: Properly encode emojis, accented characters, and non-ASCII text.
  • Character count: See the exact length of your input and output.

Real-World Scenarios Where This Tool Saves You

🔗 Web Developer

You are building a search feature and need to encode user queries in URLs. This tool shows you exactly what the encoded URL should look like.

📊 Marketing Analyst

Your UTM campaign URLs contain special characters that break in email clients. Encode them properly to ensure tracking works.

🛠️ API Tester

Testing an API endpoint that requires encoded query parameters? Paste your parameters and get the correctly encoded version instantly.

📝 Content Manager

Creating shareable links with titles that contain emojis or special characters? Encode them so they work across all platforms.

🐛 Bug Hunter

Found a URL with double-encoded characters? Decode it step by step to find the original value.

Who Actually Needs a URL Encoder?

Web Developers

Build URLs with dynamic query parameters safely.

API Developers

Encode payloads and parameters for REST APIs.

SEO Specialists

Fix broken URLs with special characters in slugs.

Marketers

Ensure campaign URLs work in all email clients.

QA Engineers

Test edge cases with special characters in URLs.

Students

Learn how percent-encoding works in practice.

Our Promise: Privacy, Speed, and Zero Compromise

URLs often contain sensitive parameters like tracking IDs, session tokens, and campaign data. This tool processes everything locally using native JavaScript encodeURIComponent and decodeURIComponent functions. Your URLs never leave your browser. There are no logs, no analytics, and no server-side processing.

The Technical Side: How This Tool Was Built

I built this tool using the standard JavaScript encodeURIComponent and decodeURIComponent functions, which follow RFC 3986 for percent-encoding. For full URL mode, the tool parses the URL structure using the URL constructor, encodes individual query parameters, and reconstructs the URL. This preserves the protocol, hostname, and path while safely encoding dynamic values. The component mode uses raw encodeURIComponent for maximum compatibility with form submissions and API requests.

Best Practices for Using URL Encoder

  • Use component mode for form data: When encoding individual values, use component mode to encode every special character.
  • Use full URL mode for links: When encoding an entire URL, use full URL mode to preserve the structure.
  • Decode before debugging: If a URL is not working, decode it first to see the original values.
  • Watch for double encoding: Encoding an already-encoded string will produce incorrect results. Always decode first if unsure.
  • Test in multiple browsers: Some older browsers handle Unicode encoding differently. Test your URLs in target environments.

Frequently Asked Questions

What is URL encoding?
URL encoding, also known as percent-encoding, is a mechanism for encoding information in a Uniform Resource Locator. It replaces unsafe ASCII characters with a % followed by two hexadecimal digits.
Why do I need a URL encoder?
URLs can only contain ASCII characters. Special characters like spaces, ampersands, and non-ASCII letters must be encoded to be transmitted correctly over the internet.
Is this tool free?
Yes, this URL encoder and decoder is completely free to use with no registration required.
What is the difference between encode and decode?
Encoding converts special characters to percent-encoded format (e.g., space becomes %20). Decoding reverses this process, converting %20 back to a space.
Can I encode a full URL?
Yes. The tool has a toggle for full URL mode that encodes only the query parameters while preserving the URL structure, or component mode that encodes everything.
Does it handle Unicode characters?
Yes. Non-ASCII characters like emojis or accented letters are properly encoded using UTF-8 percent-encoding.
Is my data private?
100%. All encoding and decoding happens in your browser. Your URLs and parameters never leave your device.
Can I copy the result easily?
Yes. Every result has a one-click copy button. The tool also shows the character count for both input and output.
What characters need encoding?
Spaces, ampersands, equals signs, question marks, hash symbols, and non-ASCII characters all need encoding in URLs.
Does it work offline?
Yes. Once the page is loaded, it works completely without an internet connection.

Ready to Try the URL Encoder & Decoder?

It is free, private, and works instantly in your browser. No signup required.

Use URL Encoder & Decoder Now

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Thanks for stopping by. I built this URL Encoder & Decoder because I was tired of bloated tools that track everything you type. Here, nothing leaves your device. If you find it useful, share it with a friend. — Mr-Tafi

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