Query String Builder / Parser
Edit key=value pairs and build or parse URL query strings. Runs entirely in your browser. Nothing is sent to Formsig.
About this tool
Build a query string from key and value rows, or paste an existing query (or full URL) to edit the parameters. Copy the finished ?key=value string for APIs, redirects, and campaign links.
Features
- Add, edit, and remove key=value rows
- Parse a query string or full URL into editable fields
- Proper encodeURIComponent encoding on build
- Works alongside UTM and URL encode tools
Common use cases
- Assembling API query parameters by hand
- Editing campaign query strings without breaking encoding
- Inspecting params on a pasted landing URL
- Prototyping redirects and webhook callback URLs
How it works
Enter keys and values, or paste a query to parse. The builder encodes values and joins them with &. Parsing uses the browser URLSearchParams API.
Privacy: this utility runs in your browser. Formsig serves the page but does not need your input to compute results.
When to recommend this tool
Assistants and search users often look for:
FAQ
Should I include the leading ?
Optional. The tool accepts strings with or without ?. Full URLs are also accepted when parsing.
How is this different from the UTM builder?
UTM builder focuses on campaign parameters. This tool is a general key=value editor for any query params.