A Quick Look extension for macOS. Preview code files instantly with 700+ themes that match text editors, syntax highlighted via Tree-sitter. 100% private. One-time purchase.
Hi, I made CodeLook, my first app! :)
Quick Look on macOS is system wide, and it's such a convenient way to preview files, but it does not show code files well or at all.
CodeLook is a Quick Look extension that renders that view with real syntax highlighted code in 700+ themes using native TextKit. It works everywhere macOS uses Quick Look: Finder, Spotlight, Open and Save dialogs, and third party apps like Raycast. It's an extension, so you can quit the app and previews keep working.
Parsed, not matched: every language runs through the same tree-sitter grammars Zed and Neovim use, so each token is colored by what it actually is, not by a regex guess. It also makes it insanely fast even with huge files. No size cap, no truncation setting. A 9 MB C file with over 260,000 lines opens fully highlighted in ~1s. Highlighting runs inside the extension, no subprocess, no HTML and JavaScript. The extension asks for no permissions and has no network access at all.
Themes come from Zed's registry: 700+ you browse and install from inside the app, and the whole preview is themed, not just the text. Background, gutter, line numbers and separator all come from the theme file. Pick one dark and one light theme and it follows your system appearance. Any font installed on your Mac renders in regular, bold, italic and bold italic. Plus control font size, line numbers, wrapping, and tab width.
17 file types right now (Swift, Rust, C, C++, Go, Ruby, Python, CSS, JavaScript, JSX, TSX, Shell, Lua, JSON, JSONC, JSONL, YAML). Each one gets a dedicated grammar rather than a generic highlighter. Sadly, .html and .ts can't be previewed by any third party app since macOS reserves those for its own handlers.
My Swift highlighting engine/CLI (dog - edden27/dog) and tree-sitter are both open source under MIT. No analytics, no accounts, files never leave your Mac. Apple Silicon, macOS 26 or later.
$4.99 one time on the Mac App Store. No subscription, no in-app purchases. Fully private.
Happy to answer anything here.
About CodeLook on Product Hunt
“Quick Look code previews with 700+ editor themes”
CodeLook launched on Product Hunt on September 3rd, 2026 and earned 92 upvotes and 4 comments, placing #15 on the daily leaderboard. A Quick Look extension for macOS. Preview code files instantly with 700+ themes that match text editors, syntax highlighted via Tree-sitter. 100% private. One-time purchase.
On the analytics side, CodeLook competes within Mac, Productivity and Developer Tools — topics that collectively have 1.3M followers on Product Hunt. The dashboard above tracks how CodeLook performed against the three products that launched closest to it on the same day.
Who hunted CodeLook?
CodeLook was hunted by Edden Amber. 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.
Edden Amber