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PrismKit

JSON

JSON Linter

JSON Linter

Runs in your browserLocal

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.

JSON Size Analyzer

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.

JMESPath Tester

Run JMESPath queries against JSON and see the result live.