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JSON Size Profiler

Find the keys and paths hogging your payload. See which fields you can drop, compress, or paginate.

📥 JSON payload

📊 Heaviest paths

PathTypeSize%

How it works

The profiler walks your JSON and measures each node's serialized byte cost (UTF-8, using JSON.stringify). You can group costs by full path, by key name (to spot repeated heavy fields like avatar_url), or see just the top-level share. Everything is computed locally.