Join Two CSVs

About This Spell

With a wizard's whisper, Join two CSV datasets on one or more key columns. Supports inner, left, right, and outer joins. When headers are enabled, keys can be column names; otherwise, use 1-based indexes.

How to Cast the Spell:

Use your magic to Paste Left and Right CSVs.
Use your magic to Choose header, delimiter, and join type.
Use your magic to Enter join keys (names or 1-based indexes).
Use your magic to Click Join to generate the merged CSV.

What is CSV Merge Join?

CSV Merge Join is a free data wrangler from WizardOfAZ. Use it to merge tabular datasets into a single download as part of your analytics and reporting, without installing extra software.

Because everything happens locally in your browser, your spreadsheets stay under your control while you merge tabular datasets into a single download.

Popular ways to use CSV Merge Join

Streamline analytics and reporting by using CSV Merge Join to merge tabular datasets into a single download.
Share deliverables faster—processed tabular datasets are ready for download in seconds.
Combine CSV Merge Join with other WizardOfAZ tools to keep complex workflows in one browser tab.

Examples and workflow tips

Upload a sample file, cast the spell to merge tabular datasets into a single download, and download the processed result instantly.
Bookmark the CSV Merge Join in your browser so recurring tasks stay only one click away.
Share the spell with teammates who need a quick, no-install way to merge tabular datasets into a single download.

Frequently asked questions

Is the CSV Merge Join secure?

Yes. The CSV Merge Join runs entirely in your browser, which means your spreadsheets never leave your device.

What can I do with the CSV Merge Join?

You can analytics and reporting by processing tabular datasets without uploading them to an external service.

Can I use CSV Merge Join on mobile?

Yes. WizardOfAZ tools are responsive, so you can launch the spell on desktops, tablets, or phones without installing extra apps.

Related tools to explore

Expand your toolkit with other WizardOfAZ spells that complement CSV Merge Join:

CSV Deduplicator — Use it to work with CSV files using flexible options.
CSV Filter — Use it to work with CSV files using flexible options.
CSV Sampler — Use it to work with CSV files using flexible options.