Which CSV tool do you need?
Six small tools for working with CSV, TSV, XLSX and JSON files — pick the one that matches what you're trying to do. Nothing is uploaded.
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Merge CSV
Combine several files into one table.
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Split CSV
Break one file into smaller parts, by row count or column value.
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Dedupe CSV
Remove duplicate rows from a file.
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Clean CSV
Trim, fix case, and normalize digits/dates in a file.
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Compare CSV
See what changed between two versions of a file.
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Convert CSV
Change a file's format — CSV, TSV, XLSX or JSON.
About this tool
What you provide
- The task you want to do with a CSV, TSV, XLSX or JSON file.
What you get
- A link to the matching tool, with one line on when to use it.
- The full list of six CSV tools: merge, split, dedupe, clean, compare and convert.
Limits
- This page only points you to a tool; it does not process any file itself.
- The six tools it links to run on your device, with nothing uploaded.
How to use it
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Read the six cards
The page lists Merge, Split, Dedupe, Clean, Compare and Convert CSV, each with one line on when to use it.
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Pick the matching tool
Select the card that describes your task — for example "Combine several files into one table" for Merge CSV.
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Do the work in that tool
The card opens that tool's own page, where you choose your file and run it; this page handles no files itself.
Frequently asked questions
Which CSV tool do I need?
Merge combines several files into one table. Split breaks one file into parts, by row count or by a column's value. Dedupe removes duplicate rows. Clean trims spacing and standardizes letter case, digits and dates. Compare shows what changed between two versions of a file. Convert changes the format between CSV, TSV, XLSX and JSON. This page lists all six with a line each, so you can pick by what you are trying to do.
Can I edit a spreadsheet on this page?
No. This page is a chooser, not a tool: it never opens or processes a file itself, it only points you to the tool that does. Pick one from the list and load your file there.
Do these tools work with Excel files, or only CSV?
All six read CSV, TSV, XLSX and JSON and export back to any of those. They read the first sheet of an Excel workbook, and Convert CSV is the one that lets you choose which sheet.
Are my files uploaded when I use these tools?
No. Each of the six parses and processes the file on your device, so it stays on your device. Because the work happens in your device's memory, each file is capped at 25 MB.