Analyze JSON payload size, gzip estimate, and depth
Measure byte weight, estimated gzip size, total key counts, and object nesting levels.
About This Tool
JSON Size & Depth Analyzer helps backend and frontend engineers analyze the payload weight, compression savings, and structural complexity of API responses.
Key Features
Raw bytes and human-readable KB/MB sizes
Minification savings percentage
Total key, object, and array counters
Maximum nesting depth measurement
How to Use This Tool
- Paste any JSON string or payload into the input box.
- View instant metrics on raw size, minified size, and estimated gzip transfer weight.
- Review nesting depth and total object/array counts to optimize API performance.
Why Use This Tool
- Catch bloated API responses before shipping code to production.
- Calculate realistic over-the-wire data transfer metrics for mobile users.
- 100% private analysis with zero data leaving your browser.
Pro Tips
- Keep API response depth under 6-8 levels to ensure high frontend parsing performance
- Minifying JSON before transmission saves noticeable bandwidth on high-throughput endpoints
Frequently Asked Questions
How is the gzip size estimated?
Gzip size is calculated based on standard DEFLATE compression ratios for JSON structures (~65% reduction).
What is nesting depth?
Nesting depth measures how many layers of nested objects and arrays exist inside the JSON payload.