Data Transformation Builder
Data & analysis Local only
CSV & Data Analyzer
Local onlyInspect, filter, profile, clean, chart, and convert CSV or JSON data without uploading it.
sample.csv0 rows · 0 columns
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No rows match the current filters.
How to use it
- 01
Open structured data
Import CSV, TSV, JSON, JSONL, or NDJSON up to 20 MB; quoted fields and embedded line breaks are handled locally.
- 02
Inspect and refine
Filter and sort rows, profile inferred column types, remove duplicates or empty rows, and preview numeric charts.
- 03
Convert and export
Export the filtered result as CSV, TSV, JSON, or NDJSON, or copy formatted JSON to the clipboard.
Frequently asked questions
Does my dataset leave the browser?
No. Parsing, filtering, profiling, cleaning, charting, and export all happen in the current browser tab.
Which formats are supported?
The editor reads CSV, TSV, JSON arrays or objects, JSONL, and NDJSON, and exports CSV, TSV, JSON, and NDJSON.
Can it open huge database files or Parquet?
No. This lightweight static build intentionally targets text datasets up to 20 MB and does not claim database or Parquet support.
How are column types detected?
Non-empty values are consistently tested as numbers, booleans, ISO-like dates, or text. Source values remain intact until you run a cleaning action.
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