JSON Size Analyzer
Profile JSON payload weight — byte size, key counts, nesting depth, and heavy branches. Find the 2 MB field bloating responses — local analysis, free, no signup.
How to Use the JSON Size Analyzer
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Frequently Asked Questions
Why is my API response huge?
Usually one branch: base64 images, verbose timestamps, or unpaginated arrays. The analyzer ranks branches by bytes so the culprit surfaces first.
What size is too big?
Over 100 KB slows mobile parses; over 1 MB needs pagination or trimming. Aim responses under 50 KB for snappy apps.
Nesting depth matters?
Beyond 5–6 levels, client code and debugging suffer more than bytes suggest. Flatten deep structures where the domain allows.
Is payload data uploaded?
No — analysis runs locally in your browser. Payloads never leave your device.
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Last updated October 2026