You plug your iPhone into your Windows laptop, transfer a few hundred vacation photos, and suddenly notice something odd. Sitting right next to your familiar JPEG images are dozens of tiny files carrying a strange .aae extension. They will not open in your photo viewer. Double-clicking them throws an error. And yet they keep showing up, one for almost every edited picture in the folder.

If this sounds familiar, you are not alone. Millions of Apple users stumble across the .aae file every year, usually after moving photos to a non-Apple device for the first time. What exactly is this thing? Is it a virus? Can I delete it without destroying my pictures?

This guide answers all of those questions. By the end, you will know exactly what a .aae file does, whether you should keep or delete these files, and how to get your edited photos into a universal JPEG format that works everywhere.

What Is an .aae File?

An .aae file is a small sidecar file that Apple’s Photos app creates every time you edit a picture on an iPhone, iPad, or Mac. It first appeared with iOS 8 and macOS 10.10 Yosemite back in 2014 and has been part of Apple’s photo ecosystem ever since.

Here is the simplest way to think about it. When you crop a sunset photo, add a filter, adjust the brightness, or apply portrait-mode blur, Apple does not actually change your original image. Instead, it writes a separate file — the sidecar — that records every single adjustment you made. Think of it as a recipe card. The original photo is the raw ingredient, and the sidecar is a list of cooking instructions that tells the Photos app exactly how to transform that ingredient into the finished dish.

The file itself is written in XML, which is a structured text format that computers read easily. You could open one right now in Notepad on Windows or TextEdit on a Mac, and you would see lines of code referencing terms like “adjustment,” “crop,” “exposure,” and “filter.” None of that data is an image. There are no pixels, no colors, no visual content whatsoever inside. It is purely metadata — a detailed changelog of your edits.

Every sidecar shares the exact same filename as the photo it belongs to. So if your picture is called IMG_4523.JPG, the companion file sitting next to it will be called IMG_4523.AAE. Both always live in the same folder, and that naming link is how the Photos app knows which recipe belongs to which photo.

One last detail worth knowing: a typical .aae file weighs in at just one or two kilobytes. Even if you have thousands of them, they would barely take up a single megabyte of storage combined.

How the Sidecar System Works Behind the Scenes

Apple calls its approach “non-destructive editing,” and the .aae file is the engine that makes it possible. Understanding this concept clears up most of the confusion around these sidecar files.

In a traditional photo editor, when you crop an image or boost its contrast, the software rewrites the pixel data directly. The original version is gone unless you saved a backup first. Apple took a different path. Instead of touching the original photo, the Photos app writes all of your adjustments into a separate sidecar and leaves the source image completely untouched. Every time you open that photo in Photos, the system reads the companion file, applies the edits on the fly, and displays the finished result. But underneath, the raw original still exists in its pristine state.

This gives you a powerful safety net. Changed your mind about that black-and-white filter you applied six months ago? No problem. You can revert to the original with a single tap, or tweak individual edits without starting from scratch. All of those adjustments are just lines of text in the sidecar that can be modified or deleted at any time.

The system works beautifully across Apple devices. When you sync photos through iCloud, the sidecars travel with the images. Open the same photo on your Mac that you edited on your iPhone, and every adjustment appears exactly as you left it.

The trouble starts when photos leave the Apple ecosystem. Windows, Android, and Linux have no idea what to do with these companion files. They cannot read the XML instructions, so they display the original, unedited photo while the sidecar shows up as a confusing extra file that refuses to open. This is not a bug — it is a compatibility gap between Apple’s proprietary system and the rest of the computing world.

.aae File vs. JPEG — Understanding the Difference

This is the comparison that trips people up the most, so let us make it crystal clear.

A JPEG file is an image. It stores actual pixel data — the colors, shapes, and details that make up your photograph. When you open a JPEG, your computer renders those pixels on screen and you see a picture. An AAE sidecar is not an image at all. It stores text-based instructions about how an image was edited. It contains zero visual information. If you tried to open one in a photo viewer, you would get either an error message or a screen full of XML code. They are fundamentally different types of files that serve completely different purposes.

The size difference reflects this gap perfectly. A single iPhone photo in JPEG format might be three to five megabytes, sometimes larger. The corresponding sidecar for that same photo will almost always be under two kilobytes. That is roughly two thousand times smaller, because text instructions take up almost no space compared to millions of pixels.

The confusion gets worse during file transfers. When you import photos from an iPhone to a Windows PC using the built-in import tool, Windows often copies three files for every edited photo: the original JPEG (something like IMG_4523.JPG), a second JPEG with the edits baked in (named IMG_E4523.JPG, where the “E” stands for edited), and the AAE sidecar. So you end up with what looks like duplicate photos plus a mystery file. In reality, one is the untouched original, one is the edited version, and the sidecar is the edit recipe that only Apple devices can use.

How to Convert an .aae File to JPEG

This is one of the most searched questions on the topic, and the answer starts with an important clarification. You cannot directly convert a sidecar to a JPEG because it contains no image data. There is nothing to convert. What you actually want is to export the edited version of your photo — with all of your adjustments permanently baked in — as a new, standalone JPEG that any device can display.

Here are the most reliable ways to do that.

Export From Photos on Mac. Open the Photos app and find the edited image. Click on it, then go to File, then Export, then Export Photo. In the dialog box, choose JPEG as the format. Pick a destination folder and click Export. The resulting file is a brand-new JPEG that includes all of your edits. No sidecar needed.

Share or Email From iPhone. This is the fastest method if you are working from your phone. Open the edited photo, tap the share icon, and send it to yourself via email, AirDrop, or any messaging app. When Apple shares a photo this way, it automatically flattens the edits into the outgoing file. The recipient gets a clean JPEG with all adjustments applied — no companion file attached.

Use a Third-Party Editor on iPhone. Open the edited photo in any app that is not the built-in Photos app — Snapseed, Lightroom, VSCO, or even a basic image editor. Make a minor save or export from that app. It will create a new JPEG with the edits applied and will not generate a sidecar, because the AAE system is exclusive to Apple’s own Photos app.

A Word About Online “AAE to JPG Converters.” You will find several websites and desktop tools that claim to convert these files directly into JPEGs. Be cautious here. Since the sidecar contains only edit instructions and no pixel data, these tools cannot produce an image from the AAE data alone. Some of them work by requiring you to upload both the original JPEG and its matching sidecar, then applying the instructions server-side. Others are simply misleading. Your safest bet is always to export directly from an Apple device using one of the methods above.

Can You Actually Open One of These Files?

Technically, yes. Practically, it will not do much for you.

Because the AAE format is XML-based plain text, any text editor on any operating system can open these files. On Windows, right-click, choose Open With, and select Notepad. On a Mac, use TextEdit. What you will see is structured markup — tags with names like “adjustmentData” and “formatVersion,” along with encoded strings that describe specific edits.

If you are a developer or genuinely curious, a code editor with syntax highlighting like Visual Studio Code makes the experience more readable. It will color-code the XML tags, collapse nested sections, and let you browse the structure comfortably.

But for the average user, there is nothing actionable inside. The edit data is encoded in a format that only Apple’s Photos app can interpret. You will not be able to determine exactly how much you increased the contrast by reading the XML. So while opening one satisfies curiosity, it serves no practical editing or viewing purpose.

Is It Safe to Delete These Sidecar Files?

This is the question that makes most people nervous, and the answer depends entirely on which device you are using.

On Windows or Android — go ahead and delete them. These platforms cannot read or use AAE sidecars in any way. The files sit in your photo folders causing confusion. Removing them will not affect your photos. The images on a Windows PC are already either the unedited originals or separately exported edited versions.

On Mac or iPhone — think before you delete. If you remove the sidecar from an Apple device, the Photos app will no longer have the edit instructions for that image. Your photo will revert to its original, unedited state. The crop disappears, the filter goes away, the brightness adjustment resets. This is not the same as losing the photo — the original is perfectly safe. But if you spent time perfecting those edits and did not export the final version as a standalone JPEG first, those adjustments are gone for good.

Storage is almost never a reason to delete. At roughly one kilobyte each, even ten thousand of these files would occupy less than ten megabytes of space. If you are cleaning up disk space, AAE sidecars are not the place to find it.

The smartest approach is to export your edited photos as new JPEGs before doing any cleanup. Once you have a permanent copy of the finished image in a universally compatible format, the sidecar has done its job. At that point, deleting it carries zero risk.

Common Problems Users Face

Even once you understand what these sidecar files are, a few situations still catch people off guard.

Edits disappear after transferring photos. This is the number one complaint. You spent twenty minutes perfecting a photo on your iPhone, transferred it to your PC, and the edits are gone. Either the AAE sidecar did not get copied with the image, or your PC cannot interpret it. The fix is to always export edited photos as new JPEGs from your Apple device before transferring.

Duplicate-looking photos on your PC. When Windows imports photos, it often creates both the original and the edited JPEG. Look at the filenames — the original will be IMG_XXXX.JPG, and the edited version will be IMG_EXXXX.JPG. Once you confirm the edited version is correct, you can delete the original and the sidecar.

Renaming a file breaks the edits. The link between a photo and its sidecar depends on both files sharing the same name. Rename one without renaming the other, and the Photos app can no longer match them. Either rename both identically or export the edited image first.

Error messages when trying to open them. On Windows, double-clicking an AAE sidecar triggers a “Windows cannot open this file” dialog. This is completely normal. The file is not corrupted — Windows simply has no native app for the extension. Right-click and open with Notepad if you want to view the contents.

Practical Tips for Managing Your Photos and Sidecar Files

A few simple habits can save you a lot of headaches down the road.

First, export final versions of edited photos before moving them anywhere. On your iPhone, use the share function to email or AirDrop the finished image. On a Mac, use the File, Export option in Photos. This creates a self-contained JPEG that works on any device without needing a sidecar.

Second, favor wireless transfer methods when possible. AirDrop, iCloud Photo Library, and even email automatically flatten edits into the outgoing file. The .aae file situation mostly arises from USB cable transfers and manual folder copying, where raw files get moved without any processing.

Third, if you are archiving photos on a PC and might someday import them back into an Apple device, keep the sidecars in the same folder as their matching images with filenames intact.

Fourth, for bulk cleanup on Windows, type “*.aae” in the File Explorer search bar while inside your photos folder. Every sidecar will appear in the results. Select all and delete in one pass.

Frequently Asked Questions

1. What is an .aae file on my computer? It is a small XML-based sidecar created by Apple’s Photos app when you edit a picture on an iPhone, iPad, or Mac. It stores only the edit instructions — not the image itself — so your original photo stays completely untouched.

2. What does AAE stand for? Apple has never released an official definition, but the most widely accepted explanation is that AAE stands for “Apple Aperture Edits” or “Apple Aperture Extension.” The format traces back to Apple’s now-discontinued Aperture photo management software.

3. Can I open an .aae file on Windows? You can open it in any text editor such as Notepad, but you will only see raw XML code. Windows has no built-in app that can read the edit data and apply it to the associated photo.

4. Is it safe to delete AAE sidecar files from my Windows PC? Yes, completely safe. Windows cannot interpret or use these sidecars, so they serve no purpose on a non-Apple device. Deleting them will not remove or damage your actual photos in any way.

5. Why do AAE sidecar files appear when I transfer iPhone photos to my PC? When you copy photos from an iPhone via USB, the transfer bundles the original image, sometimes an edited copy, and the AAE sidecar together. Windows copies all three but cannot process the sidecar, so it sits as an unrecognized extra file.

6. How do I convert an .aae file to JPEG? You cannot convert it directly because it contains zero image data. The correct approach is to export the edited version of your photo as a new JPEG from the Photos app on your iPhone or Mac before transferring it to another device.

7. Will deleting an AAE sidecar on my iPhone remove the photo? No, your original photo remains perfectly safe. However, the edits you applied — filters, crops, brightness adjustments — will be permanently lost, and the image will revert to its original, unedited state within the Photos app.

8. Do AAE sidecars take up a lot of storage space? Not at all. Each sidecar is typically only one to two kilobytes. Even if you had thousands of them on your device, they would collectively occupy less than a few megabytes of storage.

9. Why did my photo edits disappear after I moved files to a new device? The destination device most likely cannot read the AAE sidecar, so it shows the unedited original instead. To prevent this, always export your edited photos as standalone JPEGs before transferring them off an Apple device.

10. Can Android devices read AAE sidecars? No. The AAE format is exclusive to Apple’s ecosystem. Android treats these files as unrecognized and has no built-in way to interpret or apply the edit instructions they contain.

11. What happens if I rename a photo but not its AAE sidecar? The connection between the two files breaks immediately. Apple matches them by filename, so if the names no longer align, the Photos app cannot locate the sidecar and your image will appear in its original, unedited form.

12. Do AAE sidecars contain viruses or malware? No. They are simple XML text files generated by Apple’s own software and pose no security threat whatsoever. They do not carry executable code and cannot infect your computer or phone.

13. Are AAE sidecars created for videos too, or only photos? AAE sidecars are generated primarily for photos edited in the Photos app. However, certain video adjustments, like trim points or filter overlays applied within Photos, can also produce a sidecar that stores those video edit instructions.

14. Do AAE sidecars work with HEIC images or only JPEGs? They work with both. Whether your iPhone captures photos in HEIC or JPEG format, the Photos app creates an AAE sidecar for any image you edit. The sidecar functions identically regardless of the original image format.

15. Why do some photos have AAE sidecars and others do not? Apple only creates a sidecar when you actually edit a photo using the built-in Photos app. Unedited photos and images edited in third-party apps like Snapseed or Lightroom will not have an accompanying AAE file.

16. Does iCloud sync AAE sidecars across my Apple devices? Yes. When iCloud Photos is enabled, the sidecars sync automatically alongside your images. This is how edits you make on your iPhone appear instantly on your Mac or iPad — the sidecar travels with the photo and gets applied on each device.

17. Can I recover edits after deleting the AAE sidecar? Once the sidecar is deleted, those specific edit instructions are gone permanently unless you have a backup through iCloud or Time Machine. The original photo survives, but the edits cannot be reconstructed from the image alone.

18. Do third-party photo editors on Windows support AAE sidecars? Most do not. A handful of professional tools claim partial support, but the vast majority of Windows applications — including Adobe Photoshop and Lightroom — cannot read or apply AAE edit instructions. The format remains largely proprietary to Apple.

19. How do I bulk delete AAE sidecar files from my Windows PC? Open File Explorer, navigate to your photos folder, and type “*.aae” in the search bar. This filters every sidecar in that directory. Select all the results and delete them in a single pass without affecting your actual image files.

20. Is an AAE sidecar the same as a RAW photo file? No, they are entirely different. A RAW file contains full unprocessed image data captured by the camera sensor. An AAE sidecar contains only text-based edit instructions and holds zero pixel or image data of any kind.

21. Why does my AAE sidecar show as 0 KB or 1 KB? That is perfectly normal. Because the file contains only a short list of XML-formatted edit instructions — not image data — it is extremely lightweight. A size of one or two kilobytes is standard even for heavily edited photos.

22. Can I manually edit the XML inside an AAE sidecar to change my photo edits? Technically you can open and modify the XML in a text editor, but it is not recommended. The edit parameters are stored in Apple’s proprietary schema, and even a small formatting error can corrupt the sidecar and cause the Photos app to ignore it entirely.

Conclusion

The .aae file is one of those things that seems confusing at first but turns out to be remarkably simple once you know the story behind it. It is nothing more than a tiny text file that stores your photo edits so Apple can keep your originals safe. On an iPhone or Mac, the system works invisibly and beautifully. The confusion only kicks in when those files cross over to Windows, Android, or other platforms that were never designed to read them.

Now that you understand what the .aae file does — and just as importantly, what it does not do — you can stop worrying. If you are on a non-Apple device, delete them freely. If you are staying in the Apple ecosystem, let them do their job quietly. And make it a habit to export finished edits as standalone JPEGs before transferring photos anywhere. That one step eliminates virtually every headache these little files can cause.