Smart Merge
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Supported formats: .csv,.xlsx,.xls,.xlsm,.xlsb,.tsv
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About Smart Merge
Combine multiple CSV files into one master dataset intelligently.
Stop copy-pasting manually. Smart Merge lets you upload 10, 50, or 100 CSV files and combines them into one.
It handles column mismatches (e.g., if File A has "Email" and File B has "E-mail") and harmonizes headers automatically.
Perfect for monthly sales reports, log consolidation, or combining split datasets.
Category: Cleaning & PreparationCommon Use Cases
- Merging 12 months of sales files
- Combining exports from different systems
- Consolidating data chunks
Key Features
- Automatically harmonizes differently-named headers referring to the same field
- Handles batches from a handful of files up to 100 at once
- Preserves row order within each source file
- Flags column mismatches instead of silently dropping data
The Smart Merge tool is compatible with: Monthly Reports, Salesforce Exports, Split Files.
After merging, run Dataset Diff to confirm nothing was lost across the source files, or use Joining if you need to combine files on a shared key instead of stacking them.
Frequently Asked Questions
Smart Merge harmonizes headers automatically, so "Email" in one file and "E-mail" in another still merge into a single column.
No hard limit, it's built to handle batches from a handful of files up to 100 at a time.
Drop all the CSV files in, check the column mapping, and download one combined file. It runs in your browser, so nothing is uploaded and there is no sign-up.
Yes. Columns are matched by name and similar headers can be mapped to the same field, so files exported from different systems merge into one consistent table.
In Excel you need Power Query or manual copy and paste, and on the command line you must strip repeated header rows yourself. This tool does it in one step and keeps a single header row.
Built for anyone consolidating recurring exports, monthly sales reports, CRM dumps, or log files, into a single working dataset.
Read the related guide →