nomacs
A fast image viewer that opens RAW and PSD files and can show the same picture in two synchronised windows.
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4 more ways to get nomacs
Other download sites
Run by third parties, not by nomacs Team. Prefer the official page above when it works.
Package managers
- winget
winget install --id nomacs.nomacs - Chocolatey
choco install nomacs - Flathub
flatpak install flathub org.nomacs.ImageLounge
About nomacs
nomacs opens the common image formats plus RAW files from cameras and Photoshop PSD documents, with metadata and notes panels alongside. Basic adjustments, cropping and resizing are built in, and it batch processes a folder when you need the same change applied to everything.
Its unusual feature is window synchronisation: two instances, even on different computers on the same network, can pan and zoom together, which is genuinely useful when comparing two versions of an image.
Strengths
- Opens RAW camera files and Photoshop PSD documents
- Synchronises pan and zoom between two windows or two machines
- Metadata panel plus basic adjustments and batch processing
- Windows, macOS, Linux, FreeBSD, Haiku and OS/2
Limitations
- Not an editor; adjustments are minimal
- The interface exposes a lot of panels at once
- RAW support depends on the libraries your build was compiled with
- Linux packaging quality varies by distribution
Details
- Pricing
- FreeFree and open source under the GPL 3.0.
- License
- GPL-3.0
- Developer
- nomacs Team
- Platforms
- Windows, macOS, Linux
- How it runs
- Downloadable app
- Account
- Not required
- Works offline
- Yes
- Best suited for
- Flicking through a folder of photos, including RAW files, without loading an editor
- Categories
- Photo tools
- Last verified
- Added
- Provenance
- Selected from the TechWalrus downloads catalog (Photos); facts checked against the developer's own pages, 2 sources on file.
Alternatives to nomacs
Compare allSoftware that can replace nomacs for an important use case, and what changes if you switch.
ImageGlass
A fast image viewer that opens the formats Windows still argues about: WebP, JXL, HEIC, AVIF, SVG, HDR and raw.
ImageGlass is a GPL-3.0 viewer with over ninety formats including JPEG XL and AVIF, though its macOS and Linux builds are newer and some features need Pro.
XnView MP
Views, converts and organises images in more than five hundred formats, free for personal use.
XnView MP reads more than five hundred formats with batch conversion and tagging, but it is closed source and commercial use requires a paid licence.
IrfanView
A tiny Windows image viewer that has opened everything since 1996 and still starts instantly.
IrfanView is a fast viewer with batch conversion and plugins, but it is Windows only, closed source and paid for commercial use.
Geeqie
Browse and organize images with a Unix desktop viewer.
Geeqie is a free GPL-2.0 viewer for browsing and organising collections, but it targets Linux and Unix-like systems only.
JPEGView
Browse images and make quick edits with a compact viewer.
JPEGView is a free GPL-2.0 compact viewer with quick edits and camera RAW support, available on Windows only.
Similar software
Related functionality, not necessarily a direct replacement.
digiKam
A photo manager built for libraries of a hundred thousand images, with face recognition, batch processing and heavy metadata support.
RawTherapee
A raw processor built around demosaicing and colour accuracy, with a 32-bit floating point engine and unusually deep controls.
ExifTool
Reads, writes and edits metadata in almost every image, audio and video format there is, and is the reference tool for the job.
