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CSV Merger
Combine multiple CSV files with matching headers into one file. Free online tool that works entirely in your browser — no upload required.
Select filesor drop files here
Files stay on your deviceUp to 100MB per fileNo account needed
Help with this tool
Is merging CSV files with PDFPilot really free?
Yes. CSV Merger is completely free to use, with no sign-up or account required.
Are my files uploaded to a server?
No. The merging runs entirely in your browser. Your files are never uploaded to PDFPilot's servers.
What happens if the files have different columns?
You'll get a clear error naming the file whose header doesn't match the first file's — this tool won't silently merge mismatched schemas, since that would misalign data under the wrong column names.
How many files can I merge at once?
As many as you upload, as long as they all share the exact same header row.
In what order are rows combined?
In the order you uploaded the files, with each file's rows appended after the previous one's.
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