Developer Tools
Flatten nested JSON into a single-level object with dot notation paths.
Use this JSON Flatten tool to convert nested JSON into a flat object where each key represents a full path. It is useful for exports, analytics prep, debugging nested payloads, quick mapping work, documentation, and turning complex objects into a simpler shape for inspection or transformation. Arrays are represented with indexed paths so you can still see where values came from.
Use this JSON Flatten tool to convert nested JSON into a flat object where each key represents a full path. It is useful for exports, analytics prep, debugging nested payloads, quick mapping work, documentation, and turning complex objects into a simpler shape for inspection or transformation. Arrays are represented with indexed paths so you can still see where values came from.
Use json flatten when you need a fast browser-based result without extra setup. It works well for quick checks, one-off tasks, and routine formatting or calculation work.
Read step-by-step usage guidance, best practices, and common mistakes.
See common questions and answers about input, output, and tool usage.
Review practical input and output examples before running the tool.
Find similar and supporting tools for adjacent actions and follow-up tasks.
Input
{"user":{"id":7,"profile":{"email":"a@example.com"}}} Output
{
"user.id": 7,
"user.profile.email": "a@example.com"
} Useful when nested values need to be reviewed as simple path-value pairs.
Input
{"orders":[{"id":101},{"id":102}]} Output
{
"orders[0].id": 101,
"orders[1].id": 102
} Useful when array content must stay traceable after flattening.
Fix: Validate or format the payload before flattening it.
Fix: Flattening converts nested structure into path-based keys, so use JSON Formatter if you want the original shape.
Fix: This tool uses indexed paths like items[0].name so each nested value remains traceable.
Fix: This page only flattens JSON. Reverse expansion would be a separate tool.
Fix: Use the flattened result for analysis or mapping, not where the original schema must stay nested.
It converts nested JSON into a flat object where each key represents the full path to a value.
Arrays use indexed paths such as orders[0].id.
No. It keeps the values but changes how they are represented.
Flatten returns path-value pairs, while Key Extractor mainly returns the path list without restructuring the values into a flat object.
It is useful when nested JSON is too deep to scan easily and you want a simpler path-based view.