Native macOS editor for huge files. A 10 GB log opens instantly β 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.
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Maker
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Hi Product Hunt, I built Caxton because I kept watching good tools fall over at sizes that are normal now. Excel stops at 1,048,576 rows. Most editors load the whole file into RAM and beachball somewhere past a few hundred MB.
Caxton is a native macOS editor (Swift/AppKit, no Electron) built around one idea: never load the file. It memory-maps everything, so a 10 GB log is scrollable and searchable the moment it opens, while indexing streams in the background. The numbers on the site are all from a benchmark harness that runs inside the real app, find across 10 GB in 1.3s (1.61M matches, counted exactly), Replace All over all of them in 1.7s as one undo step.
CSVs get a real grid: 2M rows parse in 2.6 s, sorting is typed (numbers as numbers, dates as dates, with a secondary key), dedupe/frequency/fill series included. and the file never stops being plain text, so saving writes the same CSV back.
Free 14-day trial, no card or account. Your files never leave your Mac, no telemetry of any kind. I'd love to hear what file breaks your current setup, and I'll be here all day answering questions.
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Love how fast this opens massive files on my Mac. One thing I'd really appreciate: a regex builder pane on the side so I can test patterns against the file in real time without leaving the editor. Would make debugging log queries so much smoother.
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@feride178675Β Thanks Feride, glad the speed is landing the way it was designed to.
You can get most of the way there today, the find bar (βF) takes full ICU regex and runs it live against the actual file (about 2 seconds over a 10 GB log) and matches highlight with an exact count as you refine. And Filter Lines (β§βL) pins the view to just the matching lines when you want to see hits in context.
A dedicated builder pane is honestly a good fit for how people actually debug log queries. It's on the roadmap with your name next to it. One question back: is the pain mostly writing the pattern, or seeing what the groups captured?
Love how fast this opens massive files on my Mac. One thing I'd really appreciate: a regex builder pane on the side so I can test patterns against the file in real time without leaving the editor. Would make debugging log queries so much smoother.
@feride178675Β Thanks Feride, glad the speed is landing the way it was designed to.
You can get most of the way there today, the find bar (βF) takes full ICU regex and runs it live against the actual file (about 2 seconds over a 10 GB log) and matches highlight with an exact count as you refine. And Filter Lines (β§βL) pins the view to just the matching lines when you want to see hits in context.
A dedicated builder pane is honestly a good fit for how people actually debug log queries. It's on the roadmap with your name next to it. One question back: is the pain mostly writing the pattern, or seeing what the groups captured?