Validate and format your JSON
Before doing anything else, make sure the JSON is valid. A single misplaced comma or unclosed bracket will silently break every downstream step. The formatter also pretty-prints the structure so nesting is easy to read.
Flatten nested JSON if needed
If your JSON has nested objects, most downstream tools (CSV exports, spreadsheet imports, database ingestion) expect flat rows. The flattener converts {a: {b: 1}} into {'a.b': 1} using dot-notation keys.
Extract just the keys you need
Large API responses often contain dozens of fields you don't need. Extract only the keys relevant to your task before transforming -- it makes the output cleaner and the next step faster.
Convert to CSV for spreadsheets
Once the JSON is flat and trimmed to the fields you need, convert it to CSV for import into Excel, Google Sheets, or any SQL loader. For going the other direction (CSV back to JSON), use the CSV to JSON converter.