Read your files.
The way they were meant to be read.

The fastest way to view Markdown, JSON, YAML, and CSV files on your Mac. Press Space in Finder. See it rendered. Never a wall of raw text.

Download on the Mac App Store → See how it works

Free macOS 26.2 or later Apple Silicon & Intel

What you can preview

Four formats, one fast app.

Native rendering for each file type — never a generic preview.

Markdown

Reader view with headings, lists, links, code blocks, blockquotes, tables, task lists, and an outline sidebar that jumps to any section.

.md · .markdown · .mdown · .mkd

JSON

JSON & JSONL

Colorized code view, collapsible tree view, and raw text view side-by-side. Tree sidebar navigates deep objects in one click.

.json · .jsonl · .ndjson

YAML

Syntax-highlighted with the same tree, code, and raw modes as JSON. Perfect for config files, manifests, and CI workflows.

.yaml · .yml

CSV

CSV & TSV

A real spreadsheet table with sticky headers, zebra striping, row numbers, column types, sortable columns, and a schema sidebar.

.csv · .tsv

Free forever

Everything you need to read files.

Unlimited previews. No nags. No accounts. No subscriptions.

Quick Look extension

Press Space on any supported file in Finder, Mail, Messages, or AirDrop — Quick Peek renders it instantly. No app launch required.

Find in document

Hit ⌘F to search any file with match navigation and a live count. Works in Markdown, JSON, YAML, and CSV.

Light, Dark & Match-System

Three appearance modes, custom accent colors, and a typography picker — system, serif, or mono — to match your taste.

Recents & Pinned

The home screen remembers what you've opened and lets you pin the files you keep coming back to. List or grid layout.

Drag & drop to open

Drop a file from Finder onto the window to open it instantly. Or use the native share sheet to send it onward.

Fully sandboxed

Your files are read from local disk only when you preview them — and they never leave your Mac.

PRO

Quick Peek Pro

$9.99one-time

Unlock editing for every supported file type. One purchase, lifetime access, Family Sharing supported. No subscription. No nags.

Edit Markdown in Preview, Split, or Source mode with live preview
Edit JSON and YAML with syntax-aware editing and tree navigation
Edit CSV and TSV directly in the spreadsheet grid or as raw text
Save back to the original file in place
Family Sharing so the whole house unlocks together
Restore on any Mac signed in with the same Apple ID

Upgrade in the app

Data Not Collected.

No analytics. No telemetry. No third-party SDKs. Files you open never leave your Mac. Network access is used only by Apple's StoreKit framework to verify Pro purchases.
Read the full privacy policy →