Table Tidy — Offline CSV Cleanup & Change Reports

Clean a CSV, see what changed, and save a new copy. Table Tidy lets you choose columns, trim whitespace, remove blank rows and remove duplicate rows, then inspect a preview and download a change report.

WORKED EXAMPLE: A CSV has headers item,qty and rows apple,2 / pear,3 / apple,2. With duplicate removal enabled and both columns retained, the output contains apple,2 and pear,3. Your original file is not overwritten. Use the included synthetic example first.

Includes a standalone HTML utility, documentation and a single-user license for personal and commercial work. No account, subscription or telemetry in the utility. Unzip, open the HTML file, choose a CSV, review options, preview, then download.

Supports UTF-8 comma-separated CSV up to 10 MB, 50,000 data rows and 200 columns, including quoted commas/newlines and doubled quotes. Requires unique nonblank headers and consistent field counts. Semicolon/tab-separated input and ragged records are unsupported. Preview shows the first 100 retained rows. Column selection precedes cleanup and exact, case-sensitive duplicate comparison.

Formula-prefix protection is enabled by default and can change negative numbers; it does not guarantee safe interpretation by every spreadsheet. Exports include your data; review before use or sharing.

Try the FREE Stable Line Deduplicator in this store before buying. Release candidate: automated logic checks passed; graphical browser compatibility remains unverified.