Private
Supported files are processed on your device.
FREE FILE TOOLS
Private file tools for everyday work.
PDF, Excel and CSV utilities that run in your browser. No sign-up. No file upload.
Choose a tool12 tools · Browser-based · Free
PRIVATE BY DEFAULT
Your files stay in your browser.
Supported tools process files on your device instead of sending them to a file-processing server.
12tools
0accounts
Localprocessing
TOOLBOX
Choose a tool.
PDF · Excel · CSV
PDF+
Merge PDF
Combine multiple PDFs into one file.
1-3
Extract PDF Pages
Save selected pages as a new PDF.
IMG
Image to PDF
Turn JPG or PNG images into one PDF.
XLS
Merge Excel Workbooks
Combine workbook sheets into one Excel file.
CSV+
Merge CSV Files
Combine matching CSV files into one.
→XLS
CSV to Excel
Convert CSV data to an XLSX workbook.
XLS→
Excel to CSV
Export an Excel sheet as UTF-8 CSV.
XLS÷
Split Excel by Sheet
Save each worksheet as a separate XLSX file.
XLS≠
Compare Excel Files
Find cell differences between two worksheets.
ROW−
Remove Blank Rows
Remove fully empty spreadsheet rows.
≠
Remove Duplicates by Column
Deduplicate records by selected columns.
SIGN
Signature Pad
Draw handwriting or a signature and save it as PNG.
REAL WORKFLOWS
Start with the file you have.
Monthly CSV exports: Merge CSV checks that column headers match before appending rows, then keeps one header in the result. Use Remove Duplicates when repeated customer or order IDs need a selected key.
Excel handoff: Excel to CSV lets you select one worksheet and export its tabular values as UTF-8 CSV. Keep the original workbook for formulas, formatting and other Excel features.
Revised workbook: Compare Excel checks the same cell addresses in two chosen worksheets and downloads a CSV of changed or missing cells. It does not compare formatting or detect moved rows.
WHY UTILUMI
Simple on purpose.
Private, fast and focused on routine file work.
No sign-up
Open a tool, finish the task and download the result.
Work focused
Built around repetitive PDF and spreadsheet tasks.
HOW IT WORKS
Browser-based processing
For tools that can run locally, Utilumi uses browser APIs and JavaScript libraries to read your file and create the output in the same browser session. This removes an unnecessary upload step.
Performance depends partly on your device and browser, so very large files may take longer or exceed available memory.
For regulated, confidential or mission-critical workflows, always follow your organization's approved tools and data-handling policies.