Developer Data Tools
Browse Tools
URL tool

URL Parser / Query String Parser

Parse URLs, query strings, fragments and query parameters in the browser.

Tool Workspace

This tool runs in your browser. Developer Data Tools does not save pasted input to a server, but avoid using production secrets, access tokens, private keys or sensitive business data in any online page.

Ready. Processing runs in your browser.

Core Features

  • Break URLs into protocol, host, path, query and fragment.
  • Decode query string keys and values.
  • Build a URL from JSON parts.
  • Keep parsing local to the browser.

Common Errors

  • Parsing a relative URL without a base.
  • Forgetting that plus signs are not decoded by URLSearchParams as spaces in all contexts.
  • Encoding a full URL when only a query value should be encoded.

Real Developer Use Cases

  • Debugging OAuth redirect URLs.
  • Inspecting API filter query strings.
  • Checking webhook callback parameters.
JSON Formatter & Validator

Format and validate copied API responses.

Text Diff Checker

Compare generated output and source snippets.

Base64 Encoder/Decoder

Inspect encoded data fragments.