InciseCSV · data editorA native CSV & data editor for the Mac
Data files sit in an awkward gap on the Mac: a plain text editor shows them as a wall of commas, and a spreadsheet reformats your numbers, mangles leading zeros, and fights you on save. Incise opens CSV, TSV, and JSON as a real, editable table — right next to the raw text — and writes your edits straight back to the file, byte for byte.
It’s a genuinely native Swift and Cocoa app: fast, notarized, and free, on the Mac App Store and via Homebrew.
Version 1.12.19macOS 13.0+Notarized & Signed
Open data files as a real table
Open as a real table
CSV, TSV, and delimited files open in an editable grid — Incise detects the delimiter, header row, and column widths for you.
Edit in place
Double-click a cell to change it; the edit is written straight back to the file, touching only that field — the rest of the file is left exactly as it was.
Sort & filter
Sort by any column as a view, then Apply Sort to reorder the file itself when you want it to stick. Filter rows by value to focus in; sorting and filtering compose.
Color by type
Tint cells by inferred type — numbers, dates, booleans, and text — in both the grid and the raw text, so the shape of your data is obvious at a glance.
Fixed-width files too
Auto-detects fixed-width column boundaries, and lets you nudge, add, or remove them by hand when a file needs a little help.
Built for big files
The grid only parses the rows on screen, so multi-hundred-megabyte CSVs and logs open and scroll without lag.
Convert between formats in a click
Convert Data To rewrites the file you have open into a different format and opens the result in a new tab — no web tool, no script, no upload. It runs entirely on your Mac, so it works in the sandboxed Mac App Store build too.
Conversions are conservative by design: a value only becomes a number when it round-trips exactly (so 007 stays a string), object key order is preserved, and Incise warns before a conversion that would drop comments.
It’s a full editor, too
The table view sits inside a proper native text editor — syntax highlighting for two dozen languages, multi-tab editing, regex find & replace, side-by-side diff, code folding, and one-command formatting. The same window handles your code and your data.
Coming from Windows? See Incise as a native Notepad++ for Mac, or the full feature set.