MPViewer
Native. Open source. Built for speed.

Your photos.
At full speed.

A fast, focused image viewer for macOS. Browse entire folders, inspect RAW files, zoom into every detail and keep your workflow moving.

Download Beta 1 Explore features

macOS 14 or later • Apple silicon + Intel • Universal 2

MPViewer browsing a folder of RAW photographs with a folder tree, thumbnail grid, histogram and EXIF inspector
InstantFolder browsing
Universal 2Intel + Apple silicon
PrivateYour photos stay local
Open sourceBuilt in the open
Less waiting. More seeing.

Made for the way photographers actually browse.

MPViewer gets out of your way. Open a folder and move from overview to pixel-level inspection in seconds—without importing a catalog or surrendering your files to a library.

01

See the whole image.
Then see everything.

Fullscreen viewing stays fast and fluid. Zoom with the keyboard or mouse wheel, pan by dragging, and use the movable navigator to keep your place at any magnification.

  • Fit-to-screen and precise percentage zoom
  • Resizable, draggable navigator minimap
  • Fullscreen filmstrip and quick navigation
MPViewer fullscreen mode with zoom navigator, filmstrip, histogram and detailed EXIF information
02

RAW, without the wait.

MPViewer shows an embedded preview immediately, then replaces it with a high-quality render in the background. You stay in motion while the full image catches up.

PreviewFull renderPixel detail
03

Details on demand.

Read detailed EXIF data, inspect a live RGB histogram and reveal the fullscreen inspector simply by moving to the screen edge.

04

Your folders stay folders.

Browse the real file system with an expandable folder tree, favorites and recent locations. No import step. No hidden catalog.

MPViewer Crop and Straighten workspace with adjustable crop handles and aspect ratio controls
Practical tools, close at hand

From quick inspection to a finished handoff.

Handle the everyday work without breaking your flow. Crop and straighten, rotate, rename a batch, export quickly, compare frames or send the selected image straight to your preferred editor.

Crop & straightenQuick exportBatch renameCompareRatingsExternal editor
Made for your Mac

Looks right in every light.

Let MPViewer follow macOS automatically, or keep the browser in Light or Dark mode. Your choice is remembered, while fullscreen viewing stays dark so the photograph remains the focus.

MPViewer Settings with Light appearance selected
Light
MPViewer Settings with Dark appearance selected
Dark
Why MPViewer exists

Built from a workflow I refused to give up.

For years, FastStone Image Viewer was the tool I reached for on Windows whenever I needed to move through a folder of photographs quickly.

After switching to macOS, I searched for something with the same immediacy: fast folder browsing, effortless fullscreen inspection, practical metadata and controls that stay out of the way. I couldn't find the replacement I wanted, so I started building it.

MPViewer is that project—a native Mac image viewer shaped by a real photographer's workflow, released as open source and built to keep getting better.

— Mladen Popović, creator of MPViewer

Muscle memory included

Fast by design. Faster by keyboard.

The essentials are one key away, whether you're reviewing hundreds of frames or checking one final export.

FFullscreenEnter immersive viewing
←→NavigatePrevious or next image
+−ZoomMove in or out
0FitFit image to screen
1100%Inspect actual pixels
EEditOpen in your chosen editor
View the complete feature and shortcut guide
Open source, by choice

A better viewer, built together.

MPViewer is released under the MIT License. Explore the code, report an issue, suggest a feature or help shape what comes next.

Explore on GitHub Support the project
MPViewer 1.0.1 Beta 1

Ready to take it for a spin?

One Universal 2 download runs natively on Apple silicon and Intel Macs. Requires macOS 14 Sonoma or later.

Download for macOS GitHub Release

Universal 2 · macOS 14+ · Beta software

First-launch approval requiredUnsigned and not yet notarized

This beta is ad-hoc signed, but it does not yet have an Apple Developer ID signature or Apple notarization. Gatekeeper may block the first launch.

  1. 1
    Open the DMG and drag MPViewer to Applications.
  2. 2
    Control-click MPViewer in Applications and choose Open.
  3. 3
    If it is still blocked, use System Settings → Privacy & Security → Open Anyway.
Read the complete installation guide
SHA-256a36801d1f5f2ec9383616409e2d46abb80acaa08db4984ed09b1c8578833d7c3Checksum file ↓
MPViewer app icon MPViewer for macOS

Spend less time waiting.
See more of your photographs.

Native for Apple silicon and Intel Macs. Requires macOS 14 or later.

Download MPViewer Beta
Expanded MPViewer screenshot