File tools that never
upload your file.
Split CSVs, convert spreadsheets and organise PDFs inside this browser tab. Your contracts, payroll exports and customer lists stay on your computer while the tools work.
CSV tools
Split, merge, clean and convert CSV files. The ones that are too big to open, land in a single column, or get rejected on import.
- Split CSV
Break a big CSV into numbered parts, each keeping the header row.
- Merge CSV
Merge several CSVs into one file, with one header row.
- Remove duplicate rows
Remove duplicate rows, matching on the whole row or one column.
- CSV to JSON
Turn a CSV into JSON, one object per row.
- JSON to CSV
Turn JSON into a CSV that opens in Excel.
- Change CSV delimiter
Swap commas for semicolons or back, so Excel stops putting it all in column A.
- Sort CSV
Sort by any column, as text or numbers, with whole rows moving together.
- Filter CSV rows
Pull out the active customers, or drop the test rows.
- Select CSV columns
Keep the 4 columns you need from a 40-column export, or remove the ones you don't.
- CSV to Markdown table
Turn a CSV into a Markdown table for a README or docs.
- Compare CSV files
See what changed between last month's export and this month's.
PDF tools
Merge, split, rotate and reorder PDFs. Join a signature page to the contract, drop the blank pages from a duplex scan, or pull out the pages someone asked for.
- Merge PDF
Join two or more PDFs into one document, in the order you set.
- Split PDF
Pull out one page range, or break a long PDF into single pages.
- Rotate PDF
Turn a sideways scan the right way up, and keep it that way.
- Delete PDF pages
Remove blank scans, cover sheets and internal notes before sending.
- Reorder PDF pages
Put the pages in the right order, or reverse a back-to-front scan.
- JPG to PDF
Turn photographed receipts or scanned pages into one PDF.
- Add page numbers
Number the pages of a report, and leave the cover page unnumbered if you want.
- Watermark PDF
Mark a document DRAFT or CONFIDENTIAL before it goes out.
- Crop PDF
Trim the black edges off a scan, in millimetres.
Excel tools
Convert and split .xlsx workbooks, or stack a tab-per-month workbook into one sheet. Payroll exports, price lists and member records, without retyping anything.
- Excel to CSV
Turn every tab of an .xlsx workbook into its own CSV, in one go.
- CSV to Excel
Turn a CSV into a real .xlsx workbook, with the leading zeros intact.
- Split Excel sheets
Get each tab out as its own .xlsx, when only one should be shared.
- Merge Excel files
Put 12 monthly workbooks into one file, as separate tabs or one table.
- Combine Excel sheets
Stack a tab-per-month workbook into one table you can filter.
- Excel to JSON
Turn a spreadsheet into JSON, one object per row.
- JSON to Excel
Turn JSON into an .xlsx workbook Excel won't mangle.
Why there’s no upload button
There’s no upload button on these tools, because there’s nowhere to send your file. Each tool runs inside the page you open — like a calculator on a web page, it keeps working once it has loaded.
If you’d rather check than take our word for it: use a tool once, on a sample file, with the settings you want. Then turn off your wi-fi and do exactly the same thing again in that tab, without reloading. It still works, because everything it needs is already here.