LOCAL DATA

Open a local data file and ask it questions.

Turn CSV, TSV, NDJSON, or supported JSON into a table. Filter it with read-only SQL and inspect the full record without changing the source file.

Local table
Read-only SQL
Row inspector

Download for Mac

Free download. Requires macOS 14 or later.

WHAT IT HELPS WITH

See the row, not a wall of text.

Open common data files

Choose a CSV, TSV, NDJSON, or JSON object array. Local Data shows it as rows and columns.

Ask a focused question

Use read-only SQL to sort, filter, group, or select the columns you need. Your source file is never edited.

Inspect the complete record

Move through rows and columns with the keyboard, then inspect the selected value, full row, or raw record with its original source line numbers.

FILE LIMITS

100 MB in Free.
Up to 10 GB with Pro.

Open CSV, TSV, and NDJSON files up to 10 GB with Pro. Free supports files up to 100 MB. Available memory and disk space also affect which files can be opened.

JSON arrays of objects are supported through 500 MB. For larger JSON data, use NDJSON so records can be read one at a time.

Some CSV and TSV files with quoted multiline values may need attention before they can be opened. The app shows the error instead of changing the file.

100 MBFree file limit

10 GBPro — CSV, TSV, and NDJSON

500 MBJSON object-array limit

2 sessionsSaved in Free

ACCESS

Explore a page for free. Scale up when your files or sessions grow.

FREE — INCLUDED

Explore and export a page.

Run read-only SQL and inspect rows
Copy a row or page and export a page
Keep two saved sessions

PRO — ADDS

Work with larger files and more sessions.

Open CSV, TSV, and NDJSON files up to 10 GB
Keep unlimited saved sessions
Export the complete result

Waiting for approval

Upcoming changes

These changes are not yet available in the App Store version.

[Bug] Fixed issues importing and querying CSV files with many columns.
[Bug] Fixed slow or unavailable Raw previews in the row inspector when browsing large files.
[New] The SQL panel can now be collapsed.
[Improvement] Improved row and cell selection visibility in Light mode.

View the changelog

LOCAL BY DEFAULT

Your source file stays unchanged.

Local Data reads the file you choose and runs queries on your Mac. Saved sessions remain on the Mac until you delete them. Clear closes the current view; it does not delete saved sessions.

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