See where the bytes in a JSON document go: size by path and key, depth, type counts, the largest arrays and strings, and repeated values.
JSONPath Tester
Run RFC 9535 JSONPath queries against a JSON document and see the matched values, their normalized paths, and where they sit.
JSON Linter
Strictly lint JSON for duplicate keys, trailing commas, comments, NaN, big integers and other problems, with line and column for each and a one-click fix.