The core fix is an occupancy grid. Instead of appending cells to rows in DOM order, I keep a two-dimensional map of which positions are already taken. For each cell, I find its first free row and column, place the value there, then mark every position it spans as occupied. A cell with rowspan 3 and colspan 2 claims six slots, and later cells simply skip over them. The output is a rectangular grid where every value sits in the column its header expects.

Not every table is a table element. Many modern apps render data with ARIA roles such as grid, row, columnheader and gridcell, and plenty more use plain div layouts. TableGrab detects ARIA grids and reasonably regular div grids too, then shows a preview so you can choose which one to copy.

CSV export has its own traps. Fields containing commas, quotes or newlines must be quoted, with embedded quotes doubled. Excel needs a UTF-8 byte order mark or it will mangle non-ASCII text. And because spreadsheets execute formulas, any cell starting with =, +, - or @ is prefixed with a safe character to block formula injection from untrusted pages.

On the privacy side, the extension uses Manifest V3 with activeTab, so it only reads a page when you click the toolbar button. No account, no background scraping, and nothing is uploaded.

TableGrab is free up to 100 rows per table. Pro is a one-off US$15, no subscription. You can find it here: https://pagepingapp.com/tablegrab/