No upload
Files are read directly on your device. There is no file server in the workflow.
STANDARDIZE COLUMNS
Map inconsistent column names to one clean schema.
Review every suggested match before anything is merged. Your original files stay untouched.
- ✓ Free
- ✓ No sign-up
- ✓ Browser-local
YOUR WORKSPACE● Local mode
Drop spreadsheets here
Select 2 or more Excel or CSV files
XLSX, XLS, CSV · Multi-sheet workbooks supported · Files are never uploadedWHAT IS FORMATFOLD?
A private browser toolkit for everyday spreadsheet work.
FoldSuite merges, splits, deduplicates, cleans, and compares Excel or CSV files without uploading their contents. It is free to use and requires no account.
- Processing
- Inside your browser
- Current formats
- XLSX · XLS · CSV
- Account
- Not required
PRIVATE BY DESIGN
Your spreadsheet never leaves your browser.
You approve matches
Review and edit every suggested column mapping before the merge.
Traceable output
Keep the source filename and get a change-report sheet with every export.
THREE STEPS
From mismatched files to one clean table.
- 1Choose filesPick Excel or CSV files from different systems or months.
- 2Confirm columnsReview suggested matches such as Mobile → Phone.
- 3ExportDownload one cleaned workbook plus its change report.
ONE PRIVATE SUITE, EIGHT USEFUL ENTRIES
Start with the job you need done.
Each page preconfigures the same private processing engine for a specific spreadsheet problem.
01
Split Excel files
Split by column value, worksheet, or row count.
Open tool →02Compare Excel files
Review additions, removals, and field-level changes.
Open tool →03Merge different columns
Align Name, Customer, and Client automatically.
Open tool →04Merge CSV files
Combine exports with inconsistent headers.
Open tool →05Remove duplicates
Use phone, email, ID, or another unique field.
Open tool →06Normalize dates
Standardize mixed date formats before export.
Open tool →07Standardize columns
Create one clean field schema across files.
Open tool →08Merge monthly reports
Build a traceable master table from monthly tabs.
Open tool →COMMON QUESTIONS
Built for the spreadsheet problems that waste an afternoon.
Do you upload or store my files?
No. FoldSuite reads and processes files inside your browser. Closing the page clears the working session.
Can the header be below the first row?
Yes. FoldSuite checks the opening rows and shows the detected header row for each file.
Will it change my original files?
No. Your originals stay untouched. FoldSuite creates a new workbook for download.
What happens to unmatched columns?
They remain separate unless you rename the target field to match another column. You are always in control.
KNOW BEFORE YOU EXPORT
Clear limits, no surprises.
FoldSuite is designed to merge tabular data. It preserves common cell styles, but it is not a full workbook copier.
- PreservedValues, fonts, fills, borders, alignment and number formats.
- ConvertedFormula cells use their last calculated result, not the formula itself.
- Not preservedImages, charts, macros, conditional formatting and merged-cell layout.
- Not supportedPassword-protected or damaged workbooks.
REPORT A PROBLEM
Tell us what failed — never paste spreadsheet data.
Describe the browser, file type and what you expected. Do not include names, account numbers or confidential cell content.