Is Metadata Fixer Safe? What to Check Before You Run One
Is a metadata fixer safe? It is when it runs on your own computer, leaves your originals alone and shows a preview. Six checks before you run one.
A metadata fixer is safe when it runs on your own computer, writes to a copy instead of your originals, and shows you what it will change before it writes. The risk is highest with tools that ask you to upload your whole photo library to a website, or that change your only copy in place.
"Metadata fixer" is a general name for any tool that repairs the dates, locations and other information in photo files. After a Google Takeout export, it usually means a tool that reads the .json sidecars and writes their dates back into the photos. There are scripts, desktop apps and websites that do this. The work is simple. The safety questions are about where your photos go and what happens to the files.
What a metadata fixer actually does
It reads a date and a place, for example from a Takeout .json file, and writes them into the photo's EXIF block. Often it also sets the file's created and modified dates, and some tools rename and sort the files. The picture itself is not changed; the EXIF block is a separate part of the file. Does fixing metadata reduce quality? explains why.
Nothing in that job needs a server. Reading a text file and writing a few bytes into an image is ordinary work for any computer.
Check 1: does it upload your photos?
This is the largest difference between tools. A website that fixes dates must receive your files first. That means your whole library, with children's faces, the inside of your home and the GPS position of where you live, goes to a server you do not control. What happens to that copy depends on the operator's retention policy and security, which you cannot check.
A desktop app or a script works on your own disk. Look for a clear statement that nothing is uploaded, and test it: a tool that works with the network switched off does not need your photos on a server. Why an offline photo organizer matters goes deeper into what a library reveals.
There is a practical side as well. A 200 GB export takes many hours to upload and as long again to download.
Check 2: does it change your originals?
A safe tool either writes to a new folder or tells you clearly that it changes the files in place. Writing to a new folder is the safer design: if something goes wrong, the originals are still there. If a tool edits in place, make a copy first. Keep the original Takeout zips until you have checked the result. Is it safe to delete Google Photos after export? lists what to confirm before you delete anything.
Check 3: can you see a preview?
A dry run, or preview, shows every new name, folder and date before the tool writes a file. It catches a wrong time zone or a wrong naming pattern while nothing has changed. If a tool has no preview, run it on a small test folder first.
Check 4: what does it do with the JSON files?
Some tools delete the .json sidecars after a run. The sidecars hold the only copy of the date for many Takeout photos, so deleting them before you have checked the result removes your way back. A safe tool leaves them alone or asks first. Can I delete JSON files from Google Takeout? covers when they can go.
Check 5: does it need your Google account?
A fixer that works on a Takeout export has no reason to sign in to Google. Tools that ask for access to your Google account can often read far more than the photos you meant. Prefer a tool that works on files you downloaded yourself.
Check 6: where does it come from?
Download a tool only from its own site, a known code repository or an official app store. Store apps pass a review, and apps from the Mac App Store run in Apple's sandbox, which limits what they can reach on your computer. For command-line scripts, read what the command does before you run it, and prefer projects that many people use and maintain. Are Google Takeout scripts safe? looks at scripts in detail.
Checks in one table
| Check | Safer answer | Riskier answer |
|---|---|---|
| Where the work happens | On your computer | On a website's server |
| Original files | A copy in a new folder | Changed in place, no warning |
| Preview | Dry run before writing | Writes at once |
| JSON sidecars | Kept, or deleted only when you ask | Deleted automatically |
| Google sign-in | Not needed | Needs account access |
| Source | Official site or app store | Unknown download |
How this app answers the checks
Takeout JSON Metadata Fixer was built to pass these checks. It is one of several metadata fixers; the checks above apply to it the same as to any other tool.
It runs entirely on your computer, on Mac and Windows. There is no account, no sign-in and no upload, and it works with the network off. The only optional network use is the place-name lookup, which sends approximate coordinates, never a photo or a filename; leave that switch off and the app uses no internet at all. It writes the fixed library to a new folder, so the export stays as it was. A dry run shows every change first. Deleting the source after a run is an option that is off until you turn it on. On the Mac it comes from the Mac App Store, and on Windows from the Microsoft Store or this site.
The first 500 photos are free, so you can check the result on your own library before you decide. Premium is $19.99 once.
Frequently asked questions
Is metadata fixer safe to use on my only copy?
Any tool is safer on a copy. Keep the Takeout zips, or copy the folder, until you have checked a few photos from different years.
Are online metadata fixers safe?
They can work correctly and still carry a privacy risk, because your library has to be uploaded. If you choose one, read its privacy policy and how long it keeps files. An offline tool avoids the question.
Can a metadata fixer damage my photos?
Writing EXIF changes the metadata block, not the image data. A tool that writes to a new folder cannot damage the originals.
Is exiftool safe?
exiftool is a long-established, free program that runs on your own computer. By default it keeps a backup of each file it changes, with _original at the end of the name. exiftool Google Takeout shows the command.