Change the Default Photos App in Windows 11 and 10

To change which app opens your photos: right-click any picture → Open with → Choose another app → pick the viewer you want → check "Always" (Windows 10 words it "Always use this app to open .jpg files") → OK. Done — for that file type. And that phrase is the secret this whole page turns on: Windows does not have one "photos app" setting — it keeps a separate default for every file type. Your .jpg vacation shots, your .png screenshots, and your iPhone's .heic photos can all open in three different apps, which is exactly why the problem feels haunted: you "changed the default" and half your pictures still open in the wrong place. The full fix — every type in one visit, plus the cure for defaults that keep snapping back to Photos — is below.

Jake once talked a customer out of a full wipe over this. She was sure a virus had "taken" her photos: overnight, every picture icon on the desktop had changed, and double-clicking opened them in some editing program full of toolbars she had never seen. Her grandson had installed a free photo editor the day before; during setup, it had quietly checked its own "make me the default viewer" box, hijacked .jpg and .png in one stroke, and repainted every thumbnail with its logo. The photos were untouched. Jake's entire repair was the Default apps page — two minutes — plus one sentence of advice that outlived the visit: when you install anything photo-related, watch for the checkbox that asks to become your default, because it will not ask twice.

Ethan: "People think there's one 'family doctor' setting for pictures. Windows actually keeps a specialist on file for every complaint — one for .jpg, one for .png, one for .heic. Change your doctor and wonder why the dentist stayed the same? Nobody changed the dentist. You have to update each card in the file."

Method 1 — the right-click (fixes the photo in your hand)

1. Right-click the photo → Open with → Choose another app.
2. Pick your viewer from the list — expand More apps (Windows 11: scroll, or Choose an app on your PC) if it is shy.
3. Check "Always" / "Always use this app to open .jpg files" → OK.

Notice the fine print in that checkbox: .jpg files. You just changed exactly one file type. For most people that is 80% of their photos — and the reason the remaining 20% still open in the old app is the next section, not a failure of this one.

Method 2 — every photo type in one visit

1. Open Settings (Windows key + I) → Apps → Default apps.
2. Windows 11: search for the app you want (or the file type — typing ".jpg" in the top box works too) and open the app's page. It lists every extension it can own; click each photo type — .jpg, .jpeg, .png, .gif, .bmp, .webp, .heic, .tif — and assign it. Recent Windows 11 builds also show a one-click Set default button on the app's page that claims its common types in one press.
3. Windows 10: the same Settings path shows category tiles instead — click the app under Photo viewer and pick the replacement. One click covers the common image types; the per-extension fine-tuning lives behind "Choose default apps by file type."

The extension worth double-checking even after a "Set default" press is .png — screenshots — because it is the one people most often find still opening in the old app, and .heic, which brings us to the iPhone problem.

The iPhone photo problem: .heic and its free missing piece

iPhones shoot in HEIC by default, and a Windows PC without the codec cannot open those files in any viewer — which sends people hunting for "a better photos app" when the app was never the problem. The fix is Microsoft's own free add-on: open the Microsoft Store, search HEIF Image Extensions, install it (its partner HEVC Video Extensions handles the matching iPhone videos), and .heic files open in Photos like any JPEG. Then assign .heic to your preferred viewer in Method 2 like every other type. If you would rather not deal with the format at all, the iPhone-side switch is Settings → Camera → Formats → Most Compatible, which shoots JPEG from then on.

"An app default was reset" — when Windows undoes your choice

If your photos keep snapping back to the Photos app — sometimes with a notification reading "An app default was reset" — you are not imagining it and you did not do it wrong. Windows validates default-app registrations, and when a viewer's registration looks broken or stale (classically: after the viewer updates, or after a major Windows update reshuffles things), Windows plays it safe by handing the type back to its own app. The durable fix is a clean re-registration: uninstall the viewer, reinstall its current version, then reassign the file types in Method 2. If it still loses the fight after that, the app itself is registering incorrectly — report it to its developer, and in the meantime the right-click "Always" route re-applies your choice in seconds. What does not fix it: registry-hacking the associations by hand. Windows detects hand-edited association keys as tampering and resets them — the one time fighting the system makes the symptom worse.

Honest talk: which viewer deserves the job in 2026

This page will not sell you a photo app, so here is the repair-bench view. The modern Photos app is genuinely better than its reputation — the sluggish version people remember from early Windows 10 got rebuilt, and for viewing, light cropping, and slideshows it is fine for most people; if you left it years ago out of frustration, it has earned a second look before you install anything. People who open hundreds of images — sorting scans, photography culls — tend to land on a lightweight classic like the free IrfanView, which starts instantly and walks a folder with the arrow keys. The old Windows Photo Viewer still technically exists in Windows 10 for nostalgia's sake (upgrade installs kept it selectable; fresh installs hide it), but pining for it in 2026 is mostly habit — everything it did, today's options do without registry surgery. Whatever you pick, the rule from Jake's story stands: be deliberate at install time, because every photo tool asks to own your file types, and the checkbox is always pre-checked.

Symptom triage: what's actually wrong

The nuclear option: reset every default and start clean

When years of installs have left your file types scattered across apps you half remember, the clean-slate move is on the same Default apps page: Windows 11 keeps a Reset all default apps button at the bottom (Windows 10: "Reset to the Microsoft recommended defaults"). One click hands every type back to Microsoft's apps — photos to Photos, links to Edge, music to Media Player — and from that known-good baseline you deliberately reassign the handful you care about. It is the association equivalent of making the bed before rearranging the room, and our companion guide to resetting all apps to default covers the button's full reach. Fair warning so it is not a surprise: it resets everything, including your browser choice — set your default browser back first thing after, or Edge will cheerfully claim every link you click.

The extension cheat sheet: know what you're assigning

Ten minutes with this table on the Default apps page — assigning each row deliberately — ends the whack-a-mole permanently. It is the same short list every photo tool fights over, and once every card in the file says the name you chose, nothing opens in a surprise app again until the next installer asks to change it.

FAQ — photo defaults in Windows 11 and 10

How do I change the default photo viewer in Windows 11?

Settings → Apps → Default apps → open your viewer's page → assign the photo extensions (.jpg, .png, and friends), or use its Set default button. Faster for one type: right-click a photo → Open with → Choose another app → check Always.

How do I change the default photo viewer in Windows 10?

Settings → Apps → Default apps → click the app under Photo viewer → pick the new one. Per-extension control lives under "Choose default apps by file type" on the same page.

Why do some photos still open in the old app after I changed the default?

Because Windows keeps a separate default per file type. You changed .jpg; your screenshots are .png. Assign every photo extension on the Default apps page and the haunting ends.

Why did all my photo icons suddenly change?

A newly installed app claimed your image types during its setup — the pre-checked "make me default" checkbox. Your photos are untouched; reassign the types and the icons revert.

Windows keeps resetting my default back to Photos. Why?

Windows resets registrations it judges broken — usually after the viewer or Windows itself updates. Reinstall the viewer cleanly and reassign; avoid registry hacks, which Windows treats as tampering and resets harder.

How do I open iPhone HEIC photos on Windows?

Install the free HEIF Image Extensions from the Microsoft Store (HEVC Video Extensions for the videos). After that, .heic behaves like any image type and can be assigned to any viewer.

Can I stop my iPhone from shooting HEIC entirely?

Yes: iPhone Settings → Camera → Formats → Most Compatible switches the camera to JPEG. Existing HEIC photos stay HEIC; the codec above opens those.

Is the old Windows Photo Viewer still available?

On Windows 10 machines upgraded from 7 or 8 it remains selectable; fresh installs hide it, and resurrecting it takes registry surgery we don't recommend. Modern options cover everything it did.

What's the best free photo viewer?

For most people, the current Photos app is honestly enough. Heavy sorters like the free IrfanView for its instant start and arrow-key folder walking. There is no wrong answer — only the app that matches how many photos you open a day.

My app doesn't appear in the "Open with" list. How do I add it?

Scroll the list to "Choose an app on your PC" (Windows 10: "Look for another app on this PC") and browse to the program's .exe. Once picked with Always checked, it joins the list permanently.

Does changing the default viewer affect photo editing?

Only double-click behavior changes. Any app can still open any photo through Open with, and editors can be launched directly — the default just decides who answers the door first.

How do I set defaults for pictures on a work PC that blocks Settings?

If IT policy locks the Default apps page, the right-click Always route sometimes still works — and if it doesn't, that is a deliberate company policy conversation, not a registry adventure.

What does "Reset all default apps" actually reset?

Every file-type association on the machine back to Microsoft's apps — photos, browser, mail, music, PDFs. A clean baseline; plan to reassign your browser and viewer right after.

Do I need a different viewer for RAW camera files?

Usually yes, or the free Raw Image Extension from the Store, which lets Photos display common RAW formats. Serious RAW work belongs in editing software; assign the extension to whichever you choose.

Why is .png worth checking separately?

Screenshots are .png, and it is the extension most often left behind by one-click default buttons — the classic "my photos changed but screenshots didn't" mystery in one line.

Can a photo app change my defaults without asking?

Not silently in modern Windows — but installers pre-check the permission and people click through. The ask happened; it was just dressed as a formality. Read install screens with photo tools.

Where to go next

Revision note. Originally published August 16, 2015, in Windows 10's first month, when the new Photos app had just displaced Windows Photo Viewer and half the internet wanted the old one back. Rewritten August 20, 2026 for Windows 11 and Windows 10: the per-file-type truth that explains almost every "it didn't work" complaint, the HEIC iPhone fix that didn't exist in 2015, the app-hijack story, and the "default was reset" cure. If your photo icons changed overnight and your stomach dropped — that fear is the most common version of this problem, and your pictures were fine the whole time. Anything wrong or missing here? Tell me through the contact page and I will fix it. Happy viewing.