URL Encoder, Decoder & Query Param Parser
Parse complex URLs, inspect UTM marketing tags, edit query parameters in an interactive table, and convert strings to RFC 3986 percent encoding. 100% client-side privacy.
Detected Google Analytics UTM Campaign Tags
Query Parameters Editor (5)
| Active | Key Name | Decoded Value | Action |
|---|---|---|---|
RFC 3986 Reserved Characters & Percent Equivalents
In uniform resource identifiers, reserved characters serve delimiters. To pass literal characters within query values, they must be percent-encoded:
| Character | Name | Percent Hex | Standard URL Role |
|---|---|---|---|
| & | Ampersand | %26 | Separates distinct query parameters |
| = | Equals Sign | %3D | Separates parameter key from value |
| ? | Question Mark | %3F | Initiates the query string portion |
| / | Forward Slash | %2F | Path segment directory separator |
| : | Colon | %3A | Separates protocol and port number |
| # | Number Sign / Hash | %23 | Initiates fragment anchor identifier |
| Space | Space Character | %20 or + | RFC 3986 %20, query forms accept + |
encodeURI() vs. encodeURIComponent() Comparison
| Feature | encodeURI() | encodeURIComponent() |
|---|---|---|
| Primary Purpose | Encodes a complete URL link | Encodes a single parameter value or key |
| Preserves : / ? # & = | YES (leaves untouched) | NO (encodes into %XX) |
| Example Input: "A&B" | "A&B" | "A%26B" |
| When to Use | Sanitizing an entire address string | Appending search terms or emails to query params |
How to Inspect & Edit URL Parameters Online
- Paste Target URL: Enter any web address containing search queries or marketing tracking parameters.
- Edit or Toggle Parameters: Check or uncheck parameters to enable/disable them. Edit keys and values directly in the interactive table.
- Copy Rebuilt URL: Click "Copy URL" to grab the clean, reconstructed URL ready for production use.
Frequently Asked Questions
100% In-Browser Privacy
All URL parsing, percent-encoding, and query parameter edits are processed locally in your browser session. No parameters, secret tokens, or URLs are ever transmitted across the network.
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