Encoding Pre-Filled WhatsApp, Mailto & UTM Parameters
Encode spaces (`%20`), line breaks (`%0A`), and ampersands (`%26`) in pre-filled `wa.me/?text=` or `mailto:?subject=` links so messages never get cut off mid-sentence.
URL Encoder
Safely percent-encode text, search queries, redirect URLs, and pre-filled message parameters for use inside links and API requests. Choose between Query Value mode (`encodeURIComponent` — escapes `&`, `=`, `?`, `/`, and `+`) or Whole URL mode (`encodeURI` — preserves `https://` and path slashes while escaping spaces and Unicode).
How to Use the URL Encoder
- 1
Paste or type your plain text or URL into the left input box.
- 2
Select 'Query value (recommended)' if you are encoding a parameter value that goes after `?key=`, or 'Whole URL' if you are encoding a complete web address.
- 3
Inspect the percent-encoded output updated in real time on the right.
- 4
Click Copy Encoded to copy the safe string into your link or code.
Practical Use Cases
Passing Redirect URLs Inside Query Strings
Safely escape a destination URL (e.g. `?redirect_uri=https%3A%2F%2Fexample.com%2Fcallback%3Ftab%3D1`) so its internal `?` and `&` characters don't corrupt the outer URL.
Encoding International & Unicode URL Paths
Convert non-ASCII characters, accented letters, and symbols into RFC 3986 UTF-8 percent-escapes that work reliably across email clients and legacy parsers.
URL Encoder Features
Dual RFC 3986 Encoding Modes
Switch cleanly between `encodeURIComponent` (Query Value) and `encodeURI` (Whole URL).
UTF-8 Unicode & Emoji Support
Converts accented characters, non-Latin scripts, and emojis into valid UTF-8 byte escapes.
Real-Time Live Output
Encodes every character immediately as you type without button clicks.
Runs 100% in your browser
Nothing is uploaded to a remote server, so your data and files stay strictly on your device.
Free and unlimited
No account registration, no watermarks, and no daily usage caps.
Mobile and desktop ready
Responsive layouts and comfortable touch controls that fit phones, tablets, and desktops.
Technical Specifications & Best Practices
- ✓Use 'Query value' mode (`encodeURIComponent`) whenever encoding a value placed after `=` in a query string — it escapes `&`, `=`, `+`, and `/` so they cannot break your query parameters.
- ✓Use 'Whole URL' mode (`encodeURI`) when you have a complete `https://...` address and only want to escape spaces and non-ASCII characters while keeping `://` and `/` intact.
- ✓To convert a percent-encoded string (`%20`, `%3A`, `%2F`) back into normal readable text, use our companion URL Decoder.
- ✓100% local in-browser processing with instant copy.