ガイド

Inspect URL parameters and URLSearchParams

Separate duplicate query keys, UTM values, encoded spaces and JSON handoffs clearly.

Full URL or query string?

Many bugs happen because full URLs, raw query strings and single parameters are treated the same. The inspector normalizes the input first and then separates host, path, hash and parameters.

Duplicate keys are a signal

URLSearchParams preserves repeated keys in order. That matters for tracking, filters and search parameters because one key can carry multiple values.

Make encoding visible

Spaces, plus signs and percent encoding can look similar but mean different things. The tool shows decoded values and a JSON handoff for tickets or tests.