Free Excel Tools — 100% Local & Secure
Convert, merge, and extract data from Excel spreadsheets entirely in your browser. Corporate-safe processing means your financial data never touches a cloud server.
Safe for corporate and financial data
Accountants & Finance
Client tax returns and bank statements cannot be uploaded to random internet converters due to strict privacy laws.
✓ Convert PDF financial statements to Excel entirely locally. Zero risk of data breaches.
HR & Operations
Employee payroll exports are in CSV, but management needs them formatted beautifully in Excel.
✓ Convert HR data formats instantly without violating employee data privacy (GDPR compliant).
Data Entry Teams
Combining 50 different Excel reports from regional managers into one master sheet is a nightmare.
✓ Batch merge multiple XLSX files instantly using the speed of your local processor.
Convert Excel Files
Extract multiple sheets from XLSX files into clean, flat CSV files.
Safely convert CSV to XLSX format without losing leading zeros or formatting.
Extract tables from PDF documents directly into editable Excel sheets.
Convert complex spreadsheet data into nested JSON objects for developers.
Instantly generate SQL INSERT statements from your Excel data rows.
Manage Spreadsheets
Combine multiple XLSX files into a single workbook with multiple sheets.
Split a multi-sheet workbook into individual Excel or CSV files.
Remove blank rows, trim whitespace, and fix formatting issues locally.
Unlock Excel files (if you know the password) to remove encryption.
Frequently Asked Questions
Are my financial spreadsheets uploaded to your servers?
No. Refinata uses WebAssembly to process XLSX files entirely inside your web browser. Your financial data, payroll information, and corporate secrets never leave your device.
Why does Excel keep deleting my leading zeros, and does this fix it?
Microsoft Excel auto-formats data, often deleting leading zeros from zip codes and phone numbers. Refinata's CSV to Excel converter treats data strictly as strings, preserving your exact formatting when creating the XLSX file.
Can I convert a PDF bank statement into an Excel file?
Yes! Our local PDF to Excel tool scans the document for tabular data and recreates it as a usable Excel spreadsheet without uploading the sensitive bank statement to a cloud server.
Do I need Microsoft Office installed to use these tools?
No. Refinata's tools run independently in your browser (Chrome, Edge, Firefox, Safari) and do not require an active Microsoft Office or Microsoft 365 subscription.