A careful bridge for table data

Move between CSV and JSON.
Keep every value intentional.

Convert CSV, TSV, and flat JSON records in your browser without turning IDs into numbers, dates into guesses, or private rows into uploads.

Local parsingNo type guessingSafer spreadsheet export

THE TABLE WORKSPACE

Paste a table. Check the shape. Convert.

Your rows stay hereSource text, filenames, and output never leave this tab.

Choose a local CSV, TSV, TXT, or JSON fileUTF-8 · up to 5 MB · 20,000 rows

Input delimiterJSON format

01Source

02Output

Spreadsheet-safe exportPrefixes cells that begin like formulas. Turn this off only when exact raw cell text matters more than spreadsheet safety.

A sample is ready. Edit it or convert now.

Table preview

WHY THIS TOOL

CSV values such as 001 and 9007199254740993 are not guessed into JavaScript numbers.

Nested JSON is rejected instead of being flattened into column names you did not choose.

Safe export is on by default, while raw mode stays available with a clear warning.

TABLE DATA QUESTIONS

Are my CSV or JSON rows uploaded?

No. Parsing, previewing, copying, and downloading happen in this browser tab.

Why are CSV values kept as strings?

Automatic typing can remove leading zeros, reinterpret dates, or round large integers. Keeping strings avoids those silent changes.

Can this flatten nested JSON?

No. Version one accepts flat record arrays only and reports the first nested path instead of guessing a table shape.

What does spreadsheet-safe export change?

It prefixes formula-like headers and cells with an apostrophe so common spreadsheet apps are less likely to evaluate them.

THE TOOLKIT

Private one-minute tools for files, data, creators, and campaign work.