JSON Array Group By Tool
Group JSON array records by a key or dot path, count records, summarize numeric fields, and export grouped JSON, Markdown, CSV, or checklist output locally.
Paste an array of objects from an API response, export, log sample, analytics report, or small dataset.
Grouping Settings
Use a direct key or dot path such as category, status, user.role, or meta.source.
Options
These options keep grouped output easier to inspect while still preserving enough detail for API responses, reports, and data cleanup.
Grouping JSON Arrays Into Useful Summaries
JSON arrays often contain many records with repeated categories, statuses, owners, types, sources, or tags. Grouping those records makes it easier to see counts, spot missing fields, and summarize numeric values without writing a quick script.
This tool groups an array of JSON objects by a selected key or dot path. It can count records, calculate percentages, summarize a numeric field, and export the result as readable text, grouped JSON, Markdown, CSV, or a checklist.
When This JSON Group By Tool Helps
Summarizing API response records by status, type, category, source, owner, region, or any repeated field.
Checking how many records belong to each group before converting data into a report or table.
Finding missing grouping keys in exported JSON data before importing it elsewhere.
Creating grouped JSON, Markdown summaries, or CSV reports from small datasets directly in the browser.
How to Use the JSON Array Group By Tool
- Paste a JSON array of records into the input box.
- Enter the key or dot path you want to group by, such as category, status, or user.role.
- Optionally enter a numeric field to summarize, such as views, count, amount, or duration.
- Choose sorting, missing-key handling, and output format.
- Review the group preview and copy the summary or exported data.
Example Grouped Summary
Group by: category Records: 4 Groups: 2 JSON & Data Count: 3 Percentage: 75.00% Sum views: 215 Encoding Count: 1 Percentage: 25.00% Sum views: 76
Grouping Is Best for Small and Medium JSON Samples
This browser tool is useful for quick checks, pasted API responses, examples, and small exports. Very large datasets are better handled in a database, spreadsheet, or local script because grouping thousands of complex records can become slow and difficult to review in a browser.
Frequently Asked Questions
What does this JSON group by tool do?
It groups records in a JSON array by a selected key or dot path, then counts records and optionally summarizes a numeric field.
Can I group by nested fields?
Yes. Enable flattening and use dot paths like user.role, meta.source, or product.category.
Can this summarize numbers?
Yes. Enter a numeric field and choose sum, average, or min/max summary. Non-numeric values are skipped and can be reported in the notes.
What happens when a record is missing the group key?
You can label missing records as (missing), label them as (empty), or skip them depending on the setting.
Is anything uploaded while grouping JSON?
No. The grouping runs entirely inside your browser.