Merge multiple CSV files online by matching headers by column name. Free for 2 files, Pro for 3+ files. Browser-based, no upload.
Privacy: Everything runs locally in your browser. Your source file is not uploaded to JAD Apps servers.
Combine multiple CSV files into a single file with matching headers. The CSV Merger lines up columns by header name (case-insensitive, whitespace-trimmed), so files that share most columns but differ in one or two still merge correctly — missing columns become empty cells.
Free is enough for most one-off jobs. Pro raises the file and batch caps; Pro + Media unlocks GB-scale streaming and unlimited duration.
Larger files supported on Developer (5 GB CSV) and Enterprise (unlimited). All processing happens in your browser — files never reach a server.
Drop two or more CSV files
Drag every CSV you want to combine onto the dropzone. Free accounts can merge up to 2 files; Pro lifts the limit.
Review the per-file row counts
The queue shows each file with its row count and column count. Remove any file with the X button if you change your mind.
Click Merge
Headers are matched by name. The output is the union of all headers in the order they first appear; missing values become empty cells.
Download the merged CSV
The result is a single CSV. Per-file stats show how many rows came from each source.
By header name, case-insensitive, with leading/trailing whitespace stripped. 'Email', 'email', and ' EMAIL ' are all treated as the same column.
The output uses the union of all headers. Cells in rows that didn't have a given column are left empty. The order follows the first file each header appeared in.
No — the merger only stacks rows. Run CSV Deduplicator afterwards if you need to remove duplicate records.
Free accounts handle up to 500 rows per file. Pro accepts 100,000 rows; Pro+Media accepts 500,000.
Privacy
Everything runs locally in your browser. Your source file is not uploaded to JAD Apps servers.
Remove duplicate CSV rows by choosing a unique key column like Email, SKU, phone, or ID. Browser-based, no upload.
Clean a CSV file online — remove empty rows, trim whitespace, deduplicate, and repair malformed rows. Free, browser-based, no upload.
Drag-and-drop CSV columns into any order to match your import template. Browser-based, no upload, instant download.