1. Drop your files
One .dcm file, the folder from a scan CD, or a .zip archive. Nothing leaves this page.
Free · private · in your browser
Free DICOM anonymizer
Remove the patient's name, ID, birth date and other personal details from DICOM files before you share them. Everything runs on your computer. Nothing is uploaded.
Drop your DICOM files, study folder or .zip here
Nothing is uploaded. Files are read and anonymized on this computer.
| Field | In your files | In the copy |
|---|
Some of these images (ultrasound, screenshots, photos) may show the patient's name inside the picture. Check them below and cover any text before you save.
Cover text in the images
Drag a box over any name, ID or date shown in the picture. That area is blacked out on every image in the group.
100% local: your files are read and anonymized in your browser and never uploaded.
How it works
Three steps, all of them on your own machine.
2. Check what changes
See the personal details the files hold and what the copy will say instead. Keep dates, age or descriptions if you need them, and cover any name shown in the images.
3. Save the copy
Get a new set of files with the same images. Your original files are not changed.
What it removes
Personal data out, images untouched
A DICOM file carries far more than the name on the scan. The anonymizer applies the de-identification rules of the DICOM standard (PS3.15, Annex E), which cover more than 600 fields.
Patient details
Name, ID, birth date, address, phone numbers, other names and IDs, insurance details and notes about the patient.
Hospital and staff
Hospital name and address, referring and reading doctors, operators, accession numbers, station names and device serial numbers.
Dates and UIDs
Dates and times are removed unless you keep them. Study, series and image UIDs get new values that match across the study, so it still opens as one study.
Hidden data
Private vendor tags, overlays, thumbnail images, old values kept for auditing and digital signatures.
The main fields, and what happens to them
| Field | DICOM tag | In the copy |
|---|---|---|
| Patient's name | (0010,0010) | Replaced with a name you choose |
| Patient ID | (0010,0020) | Replaced with the same name |
| Birth date | (0010,0030) | Removed |
| Sex | (0010,0040) | Removed, or kept |
| Age, height and weight | (0010,1010) (0010,1020) (0010,1030) | Removed, or kept |
| Address, phone, other IDs and names | (0010,1040) (0010,2154) (0010,1000) (0010,1001) | Removed |
| Accession number | (0008,0050) | Removed |
| Hospital name and address | (0008,0080) (0008,0081) | Removed |
| Referring, performing and reading doctors | (0008,0090) (0008,1050) (0008,1060) | Removed |
| Operators, station name, device serial number | (0008,1070) (0008,1010) (0018,1000) | Removed |
| Study, series, acquisition and content dates and times | (0008,0020) (0008,0021) (0008,0022) (0008,0023) | Removed, or kept |
| Study, series and image UIDs | (0020,000D) (0020,000E) (0008,0018) | Replaced with new UIDs |
| Study and series descriptions | (0008,1030) (0008,103E) | Kept, or removed |
| Private vendor tags | (gggg,eeee), gggg odd | Removed, or kept |
| Curves, overlays and thumbnail images | (50xx,eeee) (60xx,eeee) (0088,0200) | Removed |
Fields DICOM requires are kept but emptied, so viewers and archives still accept the files. The full list is Table E.1-1 of DICOM PS3.15.
Good to know
What it cannot remove
The anonymizer cleans the data stored with the images. Three things still need a human look.
Text inside the image
Ultrasound screens, screenshots and scanned documents often show the name in the picture itself. The tool cannot read that text, but it flags these images and lets you black it out with a box.
Faces in head scans
A 3D view of a head CT or MRI can show the face. Removing it needs a separate defacing step.
Reports and other files
Structured reports, dose reports, PDFs and DICOMDIR index files are left out of the copy, because their free text cannot be cleaned reliably.
Privacy by design
Your files never leave your device
Reading, cleaning and saving all happen in your browser. Nothing is sent to DocOrbit or anyone else, nothing is stored on a server and nothing is used to train AI models.
No upload
Files are opened directly by your browser. They never touch our servers.
No account required
No sign-up, no email and no limit on how many files you anonymize.
Originals untouched
You get a new copy. The files you dropped stay exactly as they were.
DICOM anonymizer FAQ
Are my files uploaded?
No. The files are read, cleaned and saved inside your browser, on your own computer. Nothing is sent to DocOrbit or any third party, and nothing is stored on a server.
What does the anonymizer remove?
It applies the de-identification profile of the DICOM standard (PS3.15, Annex E): the patient's name, ID, birth date, address and other identifiers, the names of doctors and staff, the hospital and its devices, accession numbers and, unless you keep them, dates and times. Private vendor tags, overlays and thumbnail images are removed, and every study, series and image UID is replaced. Study and series descriptions such as “CT chest” are kept by default because they help whoever reads the scan, and you can remove them too.
Will the anonymized files still open in a DICOM viewer?
Yes. The image data is copied unchanged, apart from any text you black out, and the files stay valid DICOM. The new UIDs are used consistently, so a study still opens as one study with its series in order. Fields that DICOM requires are emptied rather than deleted, so viewers and archives still accept the files.
Does it remove a name that is part of the image?
Only where you mark it. Text burned into the pixels, common on ultrasound and screenshots, is part of the picture, and the tool cannot read it. It flags images that are likely to carry such text, and you drag a box over the text: that area is blacked out on every image of the group. Check the copy in a viewer before you share.
Can I keep the dates, or the patient's age and sex?
Yes. Dates are removed by default because they can identify someone. Keep them if a doctor needs to compare scans over time, and keep sex, age, height and weight if they matter for the read. What you kept is recorded in the file.
Is this anonymization or pseudonymization?
With the default settings, nothing in the copy links back to the patient and no key is kept. If you give each patient a code, such as a study subject number, and keep a list of who is who, that list makes it pseudonymization in GDPR terms.
Does this make sharing a scan HIPAA or GDPR compliant?
A tool alone cannot make you compliant. The anonymizer removes the identifiers stored in the file, which is what both rules focus on, but text in the images, faces in 3D head scans and anything you add yourself still need checking. If you share scans for work, follow your organization's data protection process.
Can I anonymize a whole CD or a .zip?
Yes. Drop the folder from the CD, a .zip archive or a selection of files. Every image is anonymized and saved together in one .zip. Folder and file names are replaced as well, because exports often name them after the patient. Files that are not DICOM images, such as the viewer program on a CD, are left out.
Which scans are supported?
CT, MRI, X-ray, mammography, ultrasound, PET, nuclear medicine and secondary capture images, compressed or not. Compressed images stay compressed: the image data is copied without being decoded, so no quality is lost. An image where you black out text is decoded and saved uncompressed instead, which keeps its quality but makes the file larger.
Can a radiologist review my scan?
Yes. DocOrbit provides independent second opinions on radiology and nuclear medicine imaging from board-certified, subspecialty-matched radiologists, typically within 24 to 48 hours.
More free tools
No account, no sign-up. The DICOM tools never upload your images.
DICOM viewer
Open and scroll through a study, adjust window/level, and measure.
DICOM to NIfTI
Convert a study into .nii.gz volumes for FSL, SPM or 3D Slicer.
DICOM to JPEG
Turn slices into ordinary .jpg images you can share or drop into a document.
DICOM to PDF
Put a whole study into one document you can email, print or upload to a portal.
Report simplifier
Paste your MRI or CT report and read it back in plain language, with the terms explained.
Get a second read
Concerned about a finding?
Get an independent second opinion from a board-certified radiologist, with results in 24 to 48 hours.
