Free online tools for converting between data formats. All processing happens client-side for maximum privacy and security.
Merge CSV Files Tool
Combine multiple CSV files into a single file. Perfect for consolidating data from different sources.
Input Format: CSV
Output Format: CSV
Example: file1.csv + file2.csv + file3.csv → merged.csv
Frequently Asked Questions
Can I merge CSV files with different headers?
The tool works best with CSV files that have identical headers. Files with different headers may not merge correctly.
How many files can I merge at once?
You can merge multiple files at once. The limit depends on your browser's memory capacity.
Merge CSV Files
Combine multiple CSV files into a single file with our free online CSV merger. Preserve headers, choose delimiter options, and join data effortlessly. Secure browser-based processing with no data uploaded to servers.
CSV Processing Options
Header rows will be removed from all files except the first one
Remove empty rows from the merged output
Insert a blank row between data from each file for visual separation
File Order
Files will be merged in the order shown in the file list.
You can reorder files by:
- Dragging and dropping files
- Using the up/down arrow buttons
💡 Tip: The first file's structure will determine the column order in the merged output.
CSV Files
Select CSV Files
Upload multiple CSV files to merge them
Supports drag-and-drop file ordering
Merged CSV
Merging CSV Files
- 1.Upload multiple CSV files using the "Upload CSV" button or drag and drop
- 2.Arrange the files in the desired order using drag-and-drop or the arrow buttons
- 3.Configure processing options: header handling, empty line filtering, and visual separators
- 4.Click "Merge CSV Files" to combine the files
- 5.Copy or download the resulting merged CSV file
About CSV File Merging
Merging CSV files is useful when you need to combine data from multiple sources into a single dataset. Our tool allows you to combine CSV files while controlling how headers are handled and the order of files.
This tool is particularly useful when:
- You need to combine data exports from different time periods
- You're aggregating related datasets for analysis
- You want to merge multiple data exports for import into a database
- You're compiling logs or records from multiple sources
- You need to consolidate customer data from various departments
Why Merge CSV Files?
Merging CSV files is essential for data consolidation workflows, report generation, and analytics preparation. Whether you're combining sales data from different regions, merging inventory reports, or consolidating customer information from multiple sources, our tool ensures accurate and efficient file combination.
Common Use Cases
- • Combining monthly sales reports
- • Merging customer databases
- • Consolidating inventory data
- • Joining survey responses
- • Aggregating log files
Key Features
- • Column header alignment
- • Data type preservation
- • Duplicate detection
- • Large file support
- • Custom delimiter handling