Fix spelling and grammar anywhere on your Mac. Select text, press the shortcut, and the corrected version replaces it where it sits. A second shortcut strips the AI slop out of anything that reads like a machine wrote it. @Mentions, dates and times are untouched. It runs on the model built into macOS. Nothing you select is uploaded. Needs macOS 26 with Apple Intelligence.
I built this for myself. I was editing about two thirds of the Slack messages I sent, always for the same reason: accidental caps on, words mispelled like operator, restaurant or recommendations. macOS checks spelling well in some apps and badly in others. In Slack it barely works at all, and Gmail, Docs and Notes are all inconsistent.
Tidy is one shortcut that behaves the same everywhere. Select text, press ⌃⌥⌘T, and the corrected version fixes everything in one go, in place.
The second shortcut came later. I was collaborating on documents where whole paragraphs had obviously been AI generated. Selecting the guilty paragraph and pressing ⌃⌥⌘S rewrites it, ruthlessly 'de-slopping' back to it's core truth.
The app runs on the Apple Intelligence local model built into macOS. You might have to turn it on if you haven't already (nobody has by the way). Nothing you select leaves your machine, no API keys, its free fast and local.
It needs macOS 26 with Apple Intelligence. Happy to answer anything.
About Tidy on Product Hunt
“Fix grammar in any Mac app with free on-device AI”
Tidy launched on Product Hunt on September 3rd, 2026 and earned 119 upvotes and 11 comments, placing #8 on the daily leaderboard. Fix spelling and grammar anywhere on your Mac. Select text, press the shortcut, and the corrected version replaces it where it sits. A second shortcut strips the AI slop out of anything that reads like a machine wrote it. @Mentions, dates and times are untouched. It runs on the model built into macOS. Nothing you select is uploaded. Needs macOS 26 with Apple Intelligence.
On the analytics side, Tidy competes within Mac, Writing, Artificial Intelligence and Menu Bar Apps — topics that collectively have 652.9k followers on Product Hunt. The dashboard above tracks how Tidy performed against the three products that launched closest to it on the same day.
Who hunted Tidy?
Tidy was hunted by Eric Greene. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Eric Greene
I built this for myself. I was editing about two thirds of the Slack messages I sent, always for the same reason: accidental caps on, words mispelled like operator, restaurant or recommendations. macOS checks spelling well in some apps and badly in others. In Slack it barely works at all, and Gmail, Docs and Notes are all inconsistent.
Tidy is one shortcut that behaves the same everywhere. Select text, press ⌃⌥⌘T, and the corrected version fixes everything in one go, in place.
The second shortcut came later. I was collaborating on documents where whole paragraphs had obviously been AI generated. Selecting the guilty paragraph and pressing ⌃⌥⌘S rewrites it, ruthlessly 'de-slopping' back to it's core truth.
The app runs on the Apple Intelligence local model built into macOS. You might have to turn it on if you haven't already (nobody has by the way). Nothing you select leaves your machine, no API keys, its free fast and local.
It needs macOS 26 with Apple Intelligence. Happy to answer anything.