StacckApp

CSV Viewer, Formatter & Parser

Free online CSV viewer, parser and formatter. Auto-detects delimiter, browses rows in a table, validates and reformats — 100% in your browser.

Paste your input, drop a file, or

About this tool

Paste or upload a CSV file to browse it as a sortable table, fix formatting, or convert between delimiters. Powered by PapaParse — handles quoted commas, embedded newlines, and auto-detects delimiters. Everything runs in your browser.

About CSV Viewer, Formatter & Parser

Paste CSV text or open a .csv file to see your data laid out as a sortable table. The tool detects whether rows are separated by commas, semicolons, or tabs, reads the header row, and lets you scan every record without opening a spreadsheet program. You can also reformat messy exports into clean, consistently quoted CSV.

Everything runs locally in your browser, so the file you load never leaves your computer. That makes it suitable for checking customer lists, database dumps, or analytics exports that you would not want to send to an external service.

Frequently asked questions

Does this work with tab-separated (TSV) files?
Yes. The delimiter is auto-detected, so tab-separated files are parsed into the table the same way comma-separated ones are.
Is there a row limit?
There is no fixed limit, but very large files depend on your device's available memory since parsing happens in the browser.
Will it fix broken quoting in my CSV?
Reformatting re-quotes fields that contain commas, quotes, or line breaks so the output follows standard CSV rules.