File tools that never
upload your file.
Every other site that splits a CSV or merges a PDF sends your document to their servers first. Cleanroom doesn't have servers. The tools run inside this browser tab, on your machine, which means your contracts, payroll exports and customer lists stay where they already are.
CSV tools
Split, merge, clean and convert CSV files without sending your data anywhere. Spreadsheets full of customer records shouldn't be uploaded to a stranger's server.
- Split CSV
Break a big CSV into smaller files, header preserved on each.
- Merge CSV
Combine many CSVs into one, without repeated header rows.
- Remove duplicate rows
Deduplicate a CSV across all columns, or by one key column.
- CSV to JSON
Turn a CSV into a clean JSON array of objects.
- JSON to CSV
Turn a JSON array into a spreadsheet-ready CSV.
- Change CSV delimiter
Convert between comma, semicolon, tab and pipe delimiters.
PDF tools
Merge, split, rotate and reorder PDFs entirely on your own machine. Contracts, invoices and HR documents never touch a server.
Why this is different
"We delete your files after an hour" is a promise. It requires you to trust a company you've never heard of with a document you were careful enough to be searching for a private tool to handle.
Cleanroom makes a weaker promise about intentions and a much stronger one about architecture: there is no server that could receive your file, because the site is a set of static pages with no backend at all. You can verify it — open your browser's developer tools, watch the Network tab, and use any tool on this site. Nothing goes out. Disconnect your internet after the page loads and everything still works.