URL Encoder / Decoder
Make a link safe to use inside another link — free, instant.
How to Use the URL Encoder / Decoder
- Paste URL/String: Input your raw web link, path string, or query parameter block.
- Encode or Decode: Click "Encode" to apply percent-encoding or "Decode" to parse special characters.
- Copy Output: Copy your clean, web-safe URI string ready for deployment.
Why Use This Tool
URL encoding and decoding with proper percent-encoding online is essential whenever a special character in a URL breaks navigation or an API call. This tool converts special characters to a URL-safe format instantly, handling both encoding and decoding in one interface. It avoids the guesswork of manually typing percent-encoded characters by hand, which is easy to get wrong.
How It Works
This percent-encoding tool wraps the browser's native encodeURIComponent and decodeURIComponent functions, converting reserved and special characters to their percent-encoded equivalents or back to readable text. It's a free, fast alternative to URLEncoder.net for developers who need a quick conversion without leaving their workflow.
Key Features
The URI encoder handles spaces, ampersands, question marks, and other reserved URL characters correctly, converting them into safe percent-encoded sequences that won't break query string parsing. As a URL escape characters tool, it also decodes an already-encoded string back into readable form for inspection. Both encoding and decoding operations complete instantly with no character limit, since the entire process runs as a simple browser function call. Choose Component mode to encode a single query value, or Full URI mode to preserve structural characters like : / and ? in a complete link, and optionally use + instead of %20 for spaces to match traditional form encoding.
Common Use Cases
Developers encode a search query containing spaces and special characters before appending it to a URL. API integrators decode a percent-encoded parameter received in a webhook to read its actual value. Web developers debug a broken link caused by an unencoded special character, and SEO specialists check whether a URL slug needs encoding before publishing. Marketers encode UTM campaign parameters containing spaces or special characters before adding them to a tracking link.
Tips for Best Results
Common characters that need encoding include spaces (become %20), ampersands (%26), and question marks (%3F) when they appear within a query value rather than as a URL structural character. Always test an encoded URL in an actual browser address bar to confirm it resolves as expected. Keep a copy of the original unencoded value handy as well, since it makes future edits to the same parameter easier without needing to decode it again first.
A Quick Note
Small conversion tasks like this one are exactly the kind of routine friction a always-available browser tool is meant to remove from a developer everyday workflow.
Privacy & Security
Because ToolNest processes everything entirely within your browser using client-side JavaScript, your files never leave your device. There is no server-side storage, no third-party analytics attached to your data, and no risk of a breach exposing files you processed months ago.
What is percent-encoding and why is it necessary for URLs?
Percent-encoding converts characters that aren't allowed directly in a URL into a safe %XX format so the URL can be transmitted and parsed correctly.
How do I decode query parameters from a URL string?
Paste the encoded parameter string and click Decode to reveal the original readable text.
Does the tool encode entire URLs or just parts of them?
It encodes whatever text you paste in, so you can encode just a query value or an entire URL string as needed.
Is there a difference between encodeURI and encodeURIComponent?
This tool uses component-level encoding, which encodes more characters and is appropriate for individual query parameter values.