Caxton
A native macOS editor for 10GB logs and 2M-row CSVs. Memory-mapped, fully indexed, no Electron.
Caxton launched on July 21, 2026 with 5 votes, #4,557 of 24,623 launches that month and more than 75% of that year's launches.
What it does
Native macOS editor for huge files. A 10 GB log opens instantly — memory-mapped, not loaded. Find 1.6M matches in 1.3s, Replace All in 1.7s, one undo. CSVs get a real grid: 2M rows, typed sorting, fill series. No Electron, no cloud, no telemetry.
Caxton is a native macOS editor for the files that other editors refuse: production logs, database exports, two-million-row CSVs. Memory-mapped, fully indexed, AppKit top to bottom. No Electron involved. Not a mockup: this is Caxton holding the 10 GB benchmark log. 80,610,954 lines in the status bar. The large-file workflows Mac users have looked to EmEditor on Windows for, rebuilt as a native Mac app. Memory-mapped I/O, a piece-table document model, and a tiered line index that scales past 120 million lines. The full file opens and indexes by default (no slicing required), but a Large File Controller is there when you only want a byte range of something truly enormous. The viewport renders…from caxton.app
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