100 MB? A million rows? Drop it here. The file parses in a background thread with a live progress bar, then renders in a grid that only draws the rows on screen — so nothing freezes.
Excel tops out at 1,048,576 rows and freezes long before that on wide files. Text editors choke too. This page is built specifically for the files everything else refuses to open.
Up to 250 MB. Don't have one handy? The demo button generates a real 1,000,000-row file in your browser and opens it.
Parsing runs in a Web Worker — a background thread — with a live progress bar. The tab stays responsive the whole time.
The grid renders only the visible rows (virtualized scrolling), so a million rows scroll as smoothly as a hundred. Sort, search, export.
The two tricks: parse off the main thread, render only what's visible.
The CSV is parsed in a background Web Worker, so the page never locks up — you watch real progress instead of a frozen tab.
Only the ~30 rows on screen become DOM elements. The scrollbar is real; the other 999,970 rows are math.
Server-based tools spend minutes uploading 100 MB before they even start. Local parsing starts instantly.
Once open: sort, search, export to CSV/Excel — or run real SQL on it with the DuckDB-powered query tool.