For years the advice was automatic: the Windows Photos app is slow, so install something else. That advice is now out of date — Microsoft says a rearchitected Photos loads roughly 2.1 times faster, and the promotional clutter is gone. So the honest question is no longer “what replaces Photos?” It is: does a third-party image viewer still earn its place?
For most people opening a JPEG, the answer is probably no. For a specific and surprisingly large group, it is still yes — and the reason has almost nothing to do with speed.
This is a research-based review. I did not benchmark PicView against Photos on a test machine, and I am not going to imply otherwise. Everything below comes from the project’s own documentation and release notes, Microsoft’s stated performance figures as reported by the outlets that covered them, the public GitHub repository, and questions real users asked in public forums. Where a claim is the vendor’s own, it is labelled as such. Where I could not verify something — including PicView’s licence — I say so rather than guessing. The method behind which tools get reviewed here is published in full, including the rounds where it found nothing.
PicView opens more image formats out of the box than anything Microsoft ships, including AVIF, JPEG XL, HEIC, Photoshop files, camera RAW and comic archives. It is free, portable, and actively maintained — version 5.0.2 landed on 7 August 2026. If your library is all JPEG and PNG, the improved Photos app is probably enough. If it is not, this is the most capable free answer on Windows.
What actually changed in the Windows Photos app
Two things happened at once, and they pull in opposite directions.
The first is genuinely good. Microsoft stripped the promotional clutter out of Photos — the Designer, Clipchamp and OneDrive entries that had colonised the toolbar and the right-click menu. More importantly it moved the app to a new WASDK multi-process architecture, which Microsoft credits with cutting viewer load time by roughly 2.1 times. Reporting on the change describes context menus opening instantly now that they are not rendering advertisements for other Microsoft products.
That is a real improvement, and it deserves to be said plainly by a site that spent years recommending replacements.
So the picture is mixed. The app you open is faster than it was. The footprint of “Photos” as a whole is not obviously smaller.
The reason to install a third-party viewer is file formats
Speed was always the loudest complaint, but it was never the most durable one. The durable problem is that modern image formats keep arriving and the built-in viewer keeps needing help to open them.
This is where PicView separates itself. It opens, without plugin packs or store purchases:
| Category | Formats |
|---|---|
| Everyday | jpg · png · gif · bmp · tiff · ico · webp · svg |
| Modern / next-gen | avif · jxl (JPEG XL) · heic · heif · jp2 · qoi |
| Design & layered | psd · psb · xcf |
| Camera RAW | cr2 · cr3 · crw · nef · nrw · arw · dng · orf · raf · rw2 · raw · srf · x3f · 3fr · dcr · erf · kdc · mef · mos · mrw |
| Comics & archives | cbr · cbz · cb7 · cbt · zip · 7z · rar · tar · gzip · xz · wim · iso · cab |
| Legacy / uncommon | pgm · ppm · cut · exr · dib · tga · dds · emf · wmf · xbm · xpm · b64 |
Two entries there matter more than the rest. JPEG XL and AVIF are the formats the web is actually moving to, and being unable to double-click one is the modern equivalent of not opening a PNG. And the camera RAW list means photographers can cull a shoot without launching Lightroom — which is a genuine workflow saving, not a spec-sheet flourish.
The archive support is the quiet favourite. Opening a .cbz or a zipped folder of images directly, without extracting it first, is the kind of small thing you notice every day once you have it. It is the same pattern we found in Next Player on Android: the free, open-source option quietly handles the formats the default app makes you work around.
What PicView is, in plain numbers
| Developer | Ruben2776, developed openly on GitHub |
|---|---|
| Price | Free — no ads, no paid tier, donation link only |
| Licence | Not clearly stated. The site does not name one and GitHub cannot detect a standard licence file. The source is public and readable; the exact terms are not documented |
| Platform | Windows 10 and 11 — the project’s site also lists macOS |
| Install | Installer or portable (run from a USB stick, no install) |
| Latest release | 5.0.2, 7 August 2026 |
| GitHub stars | 3,432 |
| Forks | 186 |
| Open issues | 51 |
| First commit | January 2017 — nine years of development |
| Vendor performance claim | “Lightning fast start up”, with a preloader that caches the next image. Their words, not a measurement of ours |
What the latest release quietly admits
Release notes are the most honest documentation any project produces, because they list what was broken. Version 5.0.2 fixes, among other things, a memory leak when navigating between images, sliders and presets not working in the effects window, and a crash when starting with a URL as an argument.
None of that is alarming for a nine-year-old project shipping regularly. But it is worth knowing that if you tried PicView before August 2026 and found memory creeping up during a long browsing session, you were not imagining it — and it has since been addressed. Reading release notes before installing is a habit worth keeping; our analysis of the Huntarr incident covers what else to check in a self-hosted or sideloaded project before you trust it.
How it compares
| Viewer | Stars | Since | Licence | Character |
|---|---|---|---|---|
| PicView | 3,432 | 2017 | Not stated | Widest format list, portable, archive support |
| ImageGlass | 13,966 | 2012 | Not detected | The popular choice; larger community, longer track record |
| nomacs | 3,102 | 2013 | GPL-3.0 | The only one here with a clear, verifiable licence; cross-platform |
| FlyPhotos | 729 | 2023 | Not detected | Newest and smallest; aimed squarely at replacing Picasa |
| IrfanView | — | 1996 | Freeware (paid for commercial use) | The veteran; unmatched batch tools, dated interface |
| XnView MP | — | 1998 | Free for private use | Closest to a full image manager; heavier |
Read that honestly and ImageGlass is the safer default on community size alone — four times the stars and four more years of history. PicView’s argument is the format list and the portable build. If you want a licence you can actually point at, nomacs is the only one here that gives you one.
What works
- Opens AVIF, JPEG XL, HEIC, PSD, camera RAW and comic archives with no plugin packs
- Genuinely free: no ads, no tier, no account
- Portable build runs from a USB stick — useful on locked-down work machines
- Reads images straight out of ZIP, 7z, RAR and CBZ without extracting
- Nine years of continuous development; released the day before this was written
- EXIF viewing, batch resizing, cropping and effects included
What to weigh
- No clearly stated licence — a real consideration for business use
- ImageGlass has four times the community and a longer track record
- A memory leak during navigation existed until the August 2026 release
- 51 open issues
- The speed argument is weaker now that Photos loads ~2.1× faster
- If you only ever open JPEG and PNG, you may not need it at all
Do you actually need a third-party image viewer?
Three questions. Nothing leaves your browser. An honest answer includes “no”.
1. Do you regularly open AVIF, JPEG XL, HEIC, PSD or camera RAW files?
Yes, often
No — JPEG and PNG mostly
2. Do you browse images inside archives, or read comics (CBZ/CBR)?
Yes
No
3. Is this for a work machine where licence terms must be documented?
Yes, it matters
No, personal use
Who should install it, and who should not
Install PicView if your folders contain anything beyond JPEG and PNG — AVIF saved from the web, HEIC from a phone, RAW from a camera, PSD from a designer, or comics in CBZ. That is the case it wins, and it wins it comfortably.
Consider nomacs instead if you need a licence you can document. It is GPL-3.0, stated plainly, and that matters more in an office than a slightly shorter format list does.
Consider ImageGlass instead if you want the option most people have already stress-tested. Four times the community is a real form of quality assurance.
Stay with the built-in Photos app if you open ordinary photos, you have not been irritated by it lately, and you would rather not add software. The 2.1× improvement is Microsoft’s own figure, but the debloating is visible to anyone who opens a right-click menu. This is a legitimate answer and most roundups will not give it to you — telling readers they do not need the thing being reviewed is the point of how we review here.
Verdict
PicView is an excellent free image viewer that arrives at an awkward moment for its own category. The problem it was built to solve — a sluggish, ad-laden default viewer — is smaller than it was a month ago. What remains is a quieter, more durable advantage: it opens practically everything, it runs portably, and it costs nothing.
8.0 out of 10. The undocumented licence is the one thing keeping it from a higher score, and it is a fixable problem. If the project states its terms clearly, this becomes the easiest recommendation in the category.
Frequently asked questions
Is PicView free?
Yes. There is no paid tier, no advertising and no account requirement. The project accepts donations but nothing is gated behind them.
What licence is PicView released under?
This is not clearly documented. The project’s website does not name a licence, and GitHub cannot detect a standard licence file in the repository. The source code is public and readable, but if you need documented terms — for business use, for example — nomacs states GPL-3.0 explicitly and is the safer choice on that specific point.
Is the Windows 11 Photos app still slow?
Less so than it was. Microsoft moved Photos to a new WASDK multi-process architecture and credits it with cutting viewer load time by roughly 2.1 times, and it removed the promotional Designer, Clipchamp and OneDrive entries from the toolbar and context menus. Separately, Microsoft has begun auto-installing a WebView2-based “Photos (Preview)” gallery alongside it, which duplicates functionality and adds background footprint.
Can PicView open AVIF and JPEG XL files?
Yes, both, without installing separate codec or plugin packs. It also handles HEIC, JP2 and QOI. This is the main practical reason to install it over the built-in viewer.
Does PicView open camera RAW files?
Yes — including CR2, CR3, NEF, ARW, DNG, ORF, RAF and RW2 among others, which covers the major camera manufacturers. It is a viewer rather than a RAW editor, but it is enough to cull a shoot without opening editing software.
Is there a portable version of PicView?
Yes. Both an installer and a portable build are offered, so it can run from a USB stick without installation — useful on machines where you cannot install software.
PicView or ImageGlass — which should I pick?
ImageGlass is the more established option, with 13,966 GitHub stars against PicView’s 3,432 and development going back to 2012. PicView’s advantages are its broader format list, archive and comic-book support, and the portable build. Neither states a licence clearly.
Does PicView work on macOS?
The project’s site lists macOS alongside Windows 10 and 11. Development and the release notes are Windows-centred, so treat macOS support as the less-tested path.
Sources consulted
- picview.org — format list, features, platform and the project’s own performance claims
- PicView on GitHub — repository data and release notes for 5.0.2 (read 8 August 2026)
- Windows Latest — the debloating, the 2.1× figure Microsoft credits to WASDK, and the WebView2 gallery
- gHacks — earlier reporting on Photos consuming resources in the background
- ImageGlass and nomacs — comparison figures
Repository figures were read directly from the GitHub API on 8 August 2026 and will have moved since. The 2.1× load-time figure is Microsoft’s own, reported by Windows Latest; we have not independently measured it.