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.
- Sort CSV
Sort by any column, as text or numbers, either direction.
- Filter CSV rows
Keep or remove rows where a column matches a condition.
- Select CSV columns
Delete unwanted columns, or keep and reorder only the ones you name.
- CSV to Markdown table
Turn a CSV into a Markdown table, properly aligned and escaped.
PDF tools
Merge, split, rotate and reorder PDFs entirely on your own machine. Contracts, invoices and HR documents never touch a server.
- Merge PDF
Combine several PDFs into one document, in your chosen order.
- Split PDF
Split a PDF into single pages, chunks, or a chosen page range.
- Rotate PDF
Rotate all pages or selected pages, and save it permanently.
- Delete PDF pages
Remove blank scans, cover sheets or internal pages from a PDF.
- Reorder PDF pages
Rearrange pages into any order, or reverse a back-to-front scan.
Excel tools
Convert and split .xlsx workbooks without uploading them. Spreadsheets are where payroll, pricing and customer data actually live, which is exactly why they shouldn't be handed to a stranger's 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.