How to Convert DICOM to JPG or PNG (With Patient Data Removed)

Someone sent you a .dcm file - a CT slice, an MRI, an X-ray - and nothing on your computer will open it. Meanwhile you just need a normal image you can drop into a report, email to a colleague, or post in a case discussion. The answer is to convert the DICOM to JPG or PNG. But there is a catch most people miss: a DICOM carries the patient's identity inside every file.

This guide explains what a DICOM actually is, why converting it correctly matters for privacy, and how to do it in seconds with all patient data stripped automatically.

What is a DICOM file?

DICOM (Digital Imaging and Communications in Medicine) is the format virtually every medical scanner produces. A .dcm file is really two things bundled together:

• The image - the pixels of the scan itself (often 16-bit greyscale, sometimes multi-frame).
• The header - a long list of metadata tags describing the study.

That header is the part people forget about, and it is where the privacy problem lives.

Why DICOM privacy matters

A DICOM header is Protected Health Information (PHI). Depending on the scanner and settings, it can include the patient's name, ID number, date of birth, the study and acquisition dates, the referring physician, and the institution. If you share a raw .dcm - or convert it with a tool that copies the metadata across - you may be leaking a patient's identity without realising it.

That is why "just converting" a medical image is not enough. The conversion itself has to leave the identifying data behind.

How the conversion protects the patient

The right approach is simple: export only the image pixels. When a DICOM is converted to JPG or PNG this way, the picture is re-encoded fresh and none of the header travels with it. Every PHI tag - name, ID, birth date, dates, physician, institution - is dropped automatically. There is no checkbox and no setting to remember: the output is metadata-free by default.

The one thing no automated tool can remove is burned-in text - characters a scanner painted directly onto the image (a name in the corner, for instance). That is part of the pixels, not the header, so if your scan has it, crop it out before sharing.

JPG, PNG, or TIFF - which to choose?

• DICOM to JPG - smallest file, ideal for quick sharing, previews and inline report images.
• DICOM to PNG - lossless and artifact-free, best for documentation where every detail counts.
• DICOM to TIFF - high-fidelity option for archival and print workflows.

The image is exported using the file's stored window/level, so it looks the way a viewer would display it. For multi-frame files, the first frame is exported.

Convert your DICOM in 3 steps

1. Open the converter for your target format (links above).
2. Upload your .dcm file - drag and drop or browse. Files up to 250 MB are supported.
3. Download the image - it arrives in seconds, already free of patient metadata.

Need a de-identified DICOM instead of an image?

Sometimes you need the file to stay a valid DICOM - for research datasets, teaching files or sharing with another system - just without the patient details. For that, use DICOM Anonymize, which removes identifying tags while keeping a working .dcm output.

Is it safe to convert DICOM files online?

Medical images are among the most sensitive files there are, so privacy is built into every step:

• Each conversion runs in an isolated, in-memory process - your file never touches the disk
• Patient metadata is stripped from the exported image by default
• Your file is deleted from memory the instant your download is ready
• All transfers are encrypted with HTTPS - no account, no tracking, no storage

Organisations should always confirm that using any online service fits their internal policies and applicable regulations. For the full details, see our security and privacy pages.