Dev Tools
Query String Parser & Builder
The Query String Parser & Builder takes a URL's query string and breaks it into a readable table of key/value pairs, or lets you build a query string from scratch by entering pairs one at a time. Developers use it to quickly inspect what parameters a URL actually carries, or to construct a link with the right encoding without hand-crafting ampersands and equals signs.
Both parsing and building happen locally in your browser, so URLs you paste in — even ones containing session tokens or internal identifiers — are never sent to a server.
How to Use the Query String Parser & Builder
- Open the Query String Parser & Builder tool.
- Paste a full URL or query string to parse it into a table.
- Or add key/value pairs manually to build a new query string.
- Copy the parsed table or the generated query string.
Frequently Asked Questions
Does it automatically decode percent-encoded values in the query string?
Yes, when parsing, each value is decoded so you see the readable text rather than raw percent-encoded characters.
Can I use this to build a URL with special characters that need encoding?
Yes, when building a query string, values you enter are automatically percent-encoded so the resulting URL is valid.
Is a URL containing an access token safe to paste in here?
Yes, parsing happens entirely in your browser, so a URL with a token or session ID in its query string is never transmitted to a server.