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Check & prepare data · Supporting · Experimental helper

CSV file preview

Preview the header and first records of a CSV using quoted-field parsing.

Private by designYour input stays on your device. Processing happens in this browser.
Your workspace

Start with a file

CSV, TSV, or TXT · UTF-8 only · up to 10 MB. Original text and identifiers are retained; parsing happens when you run. Drop here, or use the file picker.

Paste CSV instead (optional)

Optional alternative to a file. Editing this text removes its selected file; source text is never reformatted during loading.

Leave blank to detect comma, semicolon, tab, or pipe. Otherwise enter one character.
Ctrl / ⌘ + Enter to run
Result

A clear result starts here

Run the tool to see your output here.

Try the example to explore how it works.
What to know about this tool

Shows up to 21 parsed rows including the header. Very large input still has to fit in browser memory. Up to 10 MB, 50,000 rows and 200 columns; rectangular CSV with unique nonblank headers required. CSV output has a conservative 20 MB cap.

Clear this workspace?

Your inputs, selected files, and current result will be cleared.

Keep the task moving
Explore workflow →
CSV column selectorExperimental helperKeep selected CSV columns and arrange them in the order you specify.Merge compatible CSV filesExperimental helperAppend the records of a second CSV to a first file with the same headers.Split CSV into filesExperimental helperSplit a CSV into smaller files by row count and download them together in a ZIP.