A better look at your files. Preview Markdown with KaTeX and Mermaid, highlight 190+ languages, view CSV and SQLite tables, browse archives and folders. All from Quick Look.
Hey everyone! I'm the developer behind Looq.
I built Looq because Quick Look on macOS handles images and PDFs great, but falls flat for everything else developers touch daily. Press Space on a Markdown file, a .swift file, or a SQLite database — you get raw text or a blank panel. I kept opening full editors just to glance at a file, and it added up.
Looq is a single Quick Look extension that previews:
Markdown — full GFM, KaTeX math, Mermaid diagrams, GitHub Alerts, auto TOC
Source code — syntax highlighting for 190+ languages, auto-formatting for minified JSON/CSS/XML
Data files — CSV and SQLite as native sortable tables with column headers and type info
Archives — browse ZIP/TAR contents without extracting
Diff/Patch — color-coded with dual line numbers
Everything runs locally on your Mac. No analytics, no telemetry, no accounts.
What file types or features would you want to see next?
Nice idea !! extending Quick Look for dev files makes a lot of sense. @parcse
Would be cool to see support for log files or very large files too : is that something you're planning to add?
The Mermaid diagram preview sold me instantly. I write a lot of docs in Markdown and always have to open a separate editor just to check if the diagrams render correctly. Does it support live-reloading, like if I edit and save a file while Quick Look is open?
Looq: Preview Files launched on Product Hunt on March 20th, 2026 and earned 104 upvotes and 15 comments, placing #15 on the daily leaderboard. A better look at your files. Preview Markdown with KaTeX and Mermaid, highlight 190+ languages, view CSV and SQLite tables, browse archives and folders. All from Quick Look.
Looq: Preview Files was featured in Mac (103.5k followers), Productivity (649.7k followers) and Developer Tools (511k followers) on Product Hunt. Together, these topics include over 200.2k products, making this a competitive space to launch in.
Who hunted Looq: Preview Files?
Looq: Preview Files was hunted by Lauren. 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.
Want to see how Looq: Preview Files stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Lauren