Data Tools

Transform data between JSON, CSV, YAML, XML, and TOML — 20 tools, all client-side. Useful for pipelines, config conversions, and ad-hoc data munging. Your data never leaves the browser, so financial and family-history files stay private.

22 tools·Free·100% local·No uploads

CSV to JSON

Convert CSV spreadsheets to JSON format.

CSV to XML

Convert CSV data to XML format.

CSV to YAML

Convert CSV data to YAML format.

CSV Transposer

Transpose CSV data — swap rows with columns.

Delete Blank Rows

Remove empty rows from CSV or TSV. Filters fully-blank rows and trims the rest. Runs in your browser, no upload.

Find Excel Duplicates

Find duplicate rows in CSV or pasted TSV. Highlights duplicates, exports a clean CSV. Runs in your browser, no upload.

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Why local?

Your photos and files never leave your device. No uploads, no servers, no file size limits.

● local · MIT · 2026

built quietly