LOCAL CSV & TSV WORKSPACE

Good data starts
with a clear view.

Check a CSV before its next import. Find broken rows, choose what to clean, and download a new copy—right here in your browser.

No uploadsNo accountsNo ads or tracking

Enable JavaScript to inspect files locally. The guides below remain available without it.

01 / SOURCE

Bring your table

Choose a CSV or TSV file

Or drop one here. Up to 5 MiB; your original stays unchanged.

Or paste / edit your source0 bytes

Input delimiterFile encoding

First record contains column headers

Choose optional cleanup Nothing selected by default

Trim outer whitespace from every cell Remove records where every cell is blank Remove exact duplicate data records Pad short records with empty cells Prefix formula-like cells with an apostrophe

Each option changes data. Formula prefixes can reduce spreadsheet evaluation risks, but are not a universal safety guarantee. Read the export guide.

Output delimiter Add UTF-8 BOM
for encoding compatibility

Limits: 5 MiB, 20,000 records, 200 columns, 200,000 cells, and 100,000 characters per cell. CSV/TSV text only; Excel workbooks are not supported.

02 / REVIEW

See what you’ll export

LOCAL ONLY

Your table will appear here after inspection.

A closer look. A cleaner handoff.

Find structure problems before they become import problems. Values stay text; cleanup stays your choice.

Data records: 0
Columns: 0
Issues: 0

Output preview

Exported cells stay strings here. A spreadsheet may still convert IDs or dates when you open the file; import identifier columns as text.

A SMALL TOOL WITH CLEAR BOUNDARIES

Inspect first.
Change with intention.

Structure, made visible

Review source-line and record locations for uneven columns, quote errors, empty headers, and duplicate header names. Auto detection is a guess you can override.

Your values stay yours

No number, date, or formula conversion. No files sent to a server. Your source stays in this tab until you clear it or leave; no file contents are saved by this tool.

A new copy, every time

Cleanup is off by default. Preview the output, review change counts, and download a UTF-8 file. Extra fields are never discarded to make a row fit.

Know what a check means

This checks table structure, not your destination’s business rules or schema. Review required fields, accepted formats, and import settings in the destination app.

THE NEXT GOOD STEP