Split Excel (.xlsx) or CSV spreadsheets by number of rows
Set the maximum row limit per file to break large datasets into ready-to-import batches. Example: 10,000 rows with a limit of 1,000 → 10 numbered files.
Files
File Splitter
FreeLocal processingv1.0.0
Split TXT, CSV files and XLSX spreadsheets into smaller parts by row limit and download everything in a ZIP.
About this app
Need to break a large spreadsheet or a list with thousands of rows to import into another system? File Splitter divides TXT, CSV files and Excel workbooks (.xlsx) directly in your browser.
When you open an XLSX file, the application identifies all available worksheets (tabs) and asks which one to use as the data source. For CSV and TXT files with delimited columns (comma, semicolon, tab or pipe), it automatically detects the column delimiter and displays a structured preview before splitting.
Set the maximum number of lines per file, choose whether to repeat the first row (header) across all parts or keep it only in the first file, freely select the output format (Excel .xlsx, CSV .csv or Text .txt), and customize the filename mask with part numbers and start/end row ranges (e.g., part 01 - from 1 to 300). When finished, download a single ZIP package containing all generated files. All processing happens locally on your device.
Features
Choose which XLSX worksheet tab to use as data
When opening an Excel workbook with multiple sheets, view the name and row count of each tab and select the exact worksheet to split.
Repeat the header row across all split files
Toggle the option to include the first row (column names) at the top of every generated part or keep it only in the first file.
Freely choose the output format (XLSX, CSV or TXT)
Select whether to save the split parts as Excel spreadsheets (.xlsx), CSV files (.csv) or plain text files (.txt), with automatic column delimiter detection.
Customize filename mask with part number and start/end row range
Use variables like {name}, {0n}, {start} and {end} to identify the row scope of each file (e.g., part 01 - from 1 to 300.xlsx, part 02 - from 301 to 600.xlsx).
Split large text files (.txt) into smaller parts
Divide lists, logs or delimited TXT files by the exact number of lines per file, keeping plain text or converting delimited columns to Excel/CSV.
Download all split files in a single ZIP package
Track the splitting progress on screen and automatically download a .zip archive containing all organized parts.
Frequently asked questions
Are my files or spreadsheets uploaded to the internet?
No. Reading, row splitting and ZIP creation happen entirely in your browser’s memory. Your data never leaves your device.
How does the maximum line count work when repeating headers?
The limit you set is the total number of rows in each final file. For example, if you set 1,000 rows per file with header repetition enabled, each part will contain 1 header row plus 999 data rows.
What happens to formulas and visual styles in XLSX files?
The app extracts calculated values and cell texts from the selected worksheet to split data quickly. Visual formatting, charts, macros and dynamic formulas are not copied to the generated parts.
What is the maximum supported file size?
You can open TXT, CSV or XLSX files up to 50 MB directly in the browser on computers or mobile devices.
Questions
No published answers yet.
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