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JSON Record Group Builder

Group JSON objects by a direct property while distinguishing missing keys, nulls and primitive value types.

Browser processingNo tool account neededTXT · CSV · JSON exports

1Start with your input
2Adjust the options
3Review & download

1Prepare & customize

JSON object arrayDirect grouping property

Combined text limit: 200,000 characters; at most 5,000 result rows. Results are generated in a background worker with a 15-second limit.

Open input or save a project

Open UTF-8 text in the first inputOpen this tool’s saved project

A project contains both input fields and options. Nothing is saved automatically. Keep private inputs out of files you share.

2Review your result

Ready. Try the example.

Text result & clipboard

Full generated text

Read the result notes before using exported files. SVG paper sizes require actual-size printing; browser fit-to-page can change scale. HTML downloads are self-contained reports, not live projects.

How to use JSON Record Group Builder

Load the example to see the expected input format: JSON object array. Fill the second field too: Direct grouping property.
Review the source before processing; no extra settings are required. Open a UTF-8 file if that is easier than pasting.
Choose Create result. Review the table, preview and tool-specific notes; changing an input clears the previous result.
Download the full result or a printable report. Save a project to reopen these inputs and settings later.

What this tool focuses on

Group JSON objects by a direct property while distinguishing missing keys, nulls and primitive value types. Combined text limit: 200,000 characters; at most 5,000 result rows.

The displayed table shows up to 100 rows at a time; exports include all supported rows. Parsed JSON uses JavaScript numeric precision, so exact large identifiers should be strings. No input is fetched from a URL or uploaded for this processing. Site advertising and analytics are described in the privacy information.

Using JSON Record Group Builder

Group JSON objects by a direct property while distinguishing missing keys, nulls and primitive value types.

Start with the example or enter json object array.
Create the result and inspect its rows.
Review tool-specific notes, then download a report or save your project.

Example

[{"team":"A","name":"Alex"},{"team":"B","name":"Sam"},{"team":"A","name":"Jo"},{"name":"Lee"}]
Second input: team

Questions & answers

What does this tool do?

Group JSON objects by a direct property while distinguishing missing keys, nulls and primitive value types.

What input should I provide?

JSON object array. Second input: Direct grouping property. The built-in example demonstrates the expected syntax.

What limits should I know?

Combined text limit: 200,000 characters; at most 5,000 result rows. Processing stops after 15 seconds and output is capped at 8 million characters. Result notes describe the algorithm and assumptions.

Can I save or print the result?

Yes. Download TXT, CSV, JSON, or a self-contained printable HTML report. A separate project JSON preserves input and settings for this tool.

Is anything uploaded or saved automatically?

No processing upload or automatic draft saving is performed. Downloads can contain your input or derived data. Site advertising and analytics are covered by the privacy information.