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Developers
Inspect IPA, APK, JAR and ZIP builds without extracting. Edit config files inside archives and save back directly.
Native macOS · Free to download
Stop extracting archives just to open one file.
Peek lets you browse, edit, and extract from ZIP, RAR, 7Z, TAR and 30+ formats directly on your Mac — no unpacking, no clutter, no cloud.
Requires macOS 15.5 or later
ZIP
RAR
7Z
TAR
GZ
JAR
WAR
Built for
Made for people who work with archives every day.
Power users
Browse TAR, 7Z and RAR without temp folders. Extract only what you need, right from Finder.
Privacy-conscious users
Everything stays local. No uploads, no accounts, no tracking. Your files never leave your Mac.
Why Peek
Archive work that stays close to the Mac.
Peek is built around real macOS workflows, not just unpacking folders.
Open internal files with Mac apps
Preview or open a file from inside an archive while Peek prepares a local working copy only when needed.
Notice changes made outside Peek
When an editable archive entry changes in another app, Peek can detect the local update and guide the save-back flow.
Use Finder before launching the app
Quick Actions, thumbnails, and Quick Look summaries surface useful archive context directly from Finder.
Respect signed packages and read-only formats
Peek separates safe editing from inspection-only containers, so package signatures and format limits stay visible. It also holds back entries whose paths would be written outside the extraction folder, and says how many it withheld.
How Peek helps
From Finder to working copy without archive clutter.
Peek keeps archive work intentional: open, inspect, preview, then extract or save back when supported.
Open from the Mac
Start in Peek, Finder Quick Actions, Open With, or by making Peek the default archive app.
Inspect the structure
Use the tree, search, breadcrumbs, and inspector details to understand what is inside.
Preview or Open With
Use Quick Look or open an entry in a compatible Mac app through a local working copy.
Extract or save back
Extract selected content, or use Pro to save supported working-copy changes back into the archive.
Finder summaries before you open
Review format, entry counts, file counts, folder counts, size, and top paths directly from Quick Look.
Quick Actions where the files are
Open supported archives, extract beside the original, or compress Finder selections without starting from a blank app window.
Advanced formats stay explicit
TAR, 7Z, package formats, streams, and read-only containers each show the capabilities Peek can safely offer.
Compare in a window of its own
A table of what changed, the diff of the entry you pick, and the version and dependency changes behind it.
Verification says what it found
Security risks, integrity failures and warnings, grouped, with checksum reports and integrity manifests to export.
Peek Pro — Signature feature
Edit inside the archive. No manual repack needed.
Open any file from inside a ZIP or 7Z with your regular Mac app — VS Code, Preview, TextEdit, anything. When you save in that app, Peek detects the change automatically and guides you to write it back into the archive. No temp folders to clean up. No manual recompression. Just open, edit, save.
Open file from archive with any Mac app
Edit and save normally in that app
Peek detects the change and saves it back
Available for ZIP, 7Z, TAR and package formats with Peek Pro.
Format coverage
Many archive families, clear capability modes.
Peek opens a broad set of archives, but separates read-only inspection from Pro editing, conversion, and creating the formats beyond ZIP.
ZIP
ZIPX
RAR
7Z
TAR
TAR.GZ
TAR.XZ
JAR
WAR
IPA
EPUB
ISO
GZIP
XZ
Explore all formats
Peek Pro
One-time purchase. No subscription. Unlocked inside the app.
$14.99
One-time unlock via the App Store — buy once, yours forever.
Download Peek free. When you're ready, unlock Pro directly inside the app from the Mac App Store.
Pro is unlocked with a one-time in-app purchase inside Peek.
Edit archives directly
Rename files, add folders, drag in new files, delete entries, or replace content — all without extracting the archive first. Peek writes changes back to ZIP, 7Z, and TAR formats when you're done.
Compare archives and verify integrity
Compare an archive with another archive, or with a folder, to spot added, removed and changed files, with a line-level diff and a summary of version and dependency changes in package.json, Podfile.lock, Package.resolved and Info.plist. Verification reports security risks, integrity failures and warnings, exports SHA-256 checksums (SHA256SUMS text or JSON), and can write an integrity manifest you check the archive against later.
Create, convert and compress
Create 7Z and TAR archives from any folder, convert between supported formats, and choose a compression profile — fast, balanced, or maximum. 7Z can also encrypt the entry names, not just the contents. Creating a ZIP, password-protected or not, is free. Advanced formats are available from Finder Quick Actions too.
Run batch operations
Extract, convert, or verify many archives in a single pass. Batches are cancelable and keep going when one file fails, with a per-file summary at the end.
Designed for local workflows
Your archives stay part of your Mac workflow.
Peek is designed around local archive work. Archives, extracted files, and working copies stay on your device unless you choose to move or share them.
- No remote upload required for archive browsing, Finder previews, or Quick Look summaries.
- Open With and preview workflows use local working copies created on demand.
- Protected archive passwords can use macOS Keychain and are not uploaded by Peek.
FAQ
Quick answers before you download.
What is Peek?
Peek Compress is a native macOS archive workspace for inspecting archives, opening internal files with Mac apps, and extracting or saving back only the changes you choose.
Do I need to extract the whole archive?
No. Peek can browse archive structure, prepare local working copies for individual files, and extract selected entries when that is all you need.
What happens when I edit a file in another app?
For editable archives, Peek monitors local working copies, detects outside changes, and can review or save those changes back with Peek Pro.
Which formats are supported?
ZIP, ZIPX, RAR, 7Z, TAR variants, CPIO, CPGZ, GZIP, BZIP2, XZ, LZMA, JAR, WAR, EAR, APK, AAR, AAB, APKS, IPA, EPUB, APPX, XPI, ISO, CAB, WIM, XIP, SPK, and more. The formats page has the full matrix.
Can Peek process several archives at once?
Yes. With Peek Pro you can extract, convert, or verify many archives in one batch. The run is cancelable, keeps going if a single file fails, and ends with a per-file summary.
How much does Peek Pro cost and how do I get it?
Peek Pro is a one-time purchase of $14.99, unlocked directly inside the app through the Mac App Store. Download Peek free, explore the app, and unlock Pro when you need the advanced features. No subscription, no recurring charges.
What does Peek Pro add?
Peek Pro is a one-time unlock for advanced editing, archive comparison, integrity verification with SHA-256 reports and integrity manifests, the security audit report, splitting a WIM into SWM parts, batch extract/convert/verify, creating 7Z and TAR archives, conversion between formats, and advanced Finder compression workflows. Creating a ZIP, with or without an AES-256 password, is free.
