CSV Merger
Merge multiple CSV files into one. Combine datasets efficiently.
Combine multiple CSV datasets into a single master file. Supports appending rows and normalizing headers across different files.
Categories
CSV Inputs
CSV 1
CSV 2
Merged Result Preview
Add valid CSV data to inputs to see the merged result.
Monthly Sales (Append)
Two monthly sales reports to merge together
Employee Lists (Different Columns)
Two lists with slightly different columns
What is the CSV Merger?
The CSV Merger tool solves the common problem of fragmented data. Whether you have monthly sales reports, daily logs, or separate lists that belong together, this tool lets you combine them into a single, unified CSV file.
It employs a smart "append" strategy. It identifies all unique headers across your input files and ensures every row in the final output respects this structure, filling in blanks where data might be missing from a specific source file.
Key Features
- Multi-File Input: Add as many CSV text blocks as you need. Start with two and add more dynamically.
- Smart Header Unification: If File A has columns "Name, Email" and File B has "Name, Phone", the result will have "Name, Email, Phone".
- Auto-Formatting: Ensures consistent quoting and delimiting in the output.
- Live Preview: Inspect the merged result immediately in the browser.
- Privacy Focused: All merging happens locally. We don't upload or store your files.
How to Merge CSV Files
- Add Inputs:
- Use the "CSV 1", "CSV 2" text areas to paste your data.
- Click "Add CSV" to include more sources.
- Review Merge:
- The tool runs automatically. As soon as valid data is detected, it processes the merge.
- If headers match, rows are simply stacked.
- If headers differ, the tool creates a superset of all columns.
- Download:
- Scroll down to the "Merged Result Preview".
- Click "Download Merged CSV" to get your combined file.
Use Cases
- Consolidating Reports: Combine "Sales_Jan.csv", "Sales_Feb.csv", and "Sales_Mar.csv" into "Q1_Sales.csv".
- Team Collaboration: Merge contact lists collected by different team members into a master database.
- Log Aggregation: Stitch together server logs from multiple machines for easier analysis.
Related Tools
- CSV Column Extractor: Extract specific columns from CSV files. Filter and clean up your data easily.
- CSV Splitter: Split large CSV files into smaller chunks by row count or specific columns.
- CSV to Excel: Convert CSV files to Microsoft Excel (.xlsx) format instantly.
- CSV to JSON: Online CSV to JSON converter
- CSV Validator: Online CSV format validator
- CSV Viewer: Online CSV viewer and analyzer
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