Open a DCM file online
Open a DCM file online in seconds. Drag it into your browser and view it immediately. Works on any operating system, nothing is uploaded.
What it does
You have a file you cannot open and you would rather not install anything to find out what is in it. That is the whole point of this page: drag the file in and it appears.
It takes a few seconds, works the same on Windows, macOS, Linux, Android and iOS, and the file stays on your device the entire time.
Nothing to install
No download, no account, no email address. Open the page and use it.
Works on any device
The same page on a phone, a tablet or a desktop machine.
One file or a whole disc
Open a single image or the entire study in one go.
Immediate answer
If the file is not what you expected, you find out straight away and in plain language.
How to use it
Open this page
No preparation is needed.
Drag your file in
Or tap to browse for it on your device.
Look at it
The image appears with controls for brightness and contrast.
Decide what next
Convert it, check what personal data it holds, or leave it as it is.
When people use it
A file arrived and you have no idea what it is
Find out in seconds whether it is a medical image and what kind.
You are on someone else’s computer
Nothing gets installed and nothing is left behind.
You are on a phone
Open an emailed scan without a desktop machine anywhere near you.
Supported files
- Uncompressed DICOM (implicit and explicit VR, little and big endian)
- RLE lossless compression
- JPEG baseline and extended, decoded by your browser
- Files with a .dcm extension, and DICOM files with no extension at all
- ZIP archives containing a whole study or several series
Limitations
- JPEG Lossless, JPEG-LS, JPEG 2000 and deflated transfer syntaxes are not decoded — they need heavy codecs we deliberately do not ship. You will get a clear message instead of a blank screen.
- This is a technical tool. It does not read your scan, does not look for findings and does not produce any diagnosis.
- Very large studies of several hundred megabytes may be slow, because all the work happens on your own machine.
Privacy and security
Processed in your browser — nothing is uploaded
Your files never leave your device. Everything runs inside your browser using JavaScript — there is no upload, no server copy and no queue.
Because nothing is uploaded, there is nothing for us to store or delete. Closing the tab removes the files from memory.
We never put file names, patient identifiers or metadata values into analytics or logs. Product events only count how many files were opened.
If you later choose the paid AI explanation, that is a separate, explicit step: you decide which files to attach and nothing is sent until you confirm.
Frequently asked questions
How do I open a DCM file?
Drag it onto this page. If it is a DICOM file, it will be displayed; if it is not, you will be told so.
Do I need to sign up?
No. There is no account, no email and no limit on how many files you open.
Is there a file size limit?
Practically, yes — everything is processed in your browser, so very large studies use a lot of memory. A few hundred megabytes is a sensible ceiling.
Can I open a DICOM file on my phone?
Yes. The page works in mobile browsers, though large studies are more comfortable on a bigger screen.