DICOM metadata viewer
Free DICOM metadata viewer. Browse every tag with its code, name, VR and value. Search, filter, spot personal data and export to JSON, CSV or TXT.
What it does
Everything a DICOM file knows about itself is stored as tags: numbered fields holding the patient, the study, the equipment and the image parameters. This page lays all of them out in a table you can search and filter.
It is built for two very different people. If you work with medical imaging, you get the raw tag codes, value representations and exact values. If you just want to know what your own file says about you, the important tags carry a plain-language explanation and anything that may identify you is highlighted.
Every tag, not a selection
Tag code, name, VR and value for the whole file, including tags outside our dictionary.
Search and filter
Search by code, name or value, filter by patient, study, series, image or equipment.
Personal data highlighted
Fields that may identify someone are marked, and can be shown on their own.
Export
Save what you are looking at as JSON, CSV or plain text.
How to use it
Load a file
One DICOM file is enough; load several to switch between them.
Search or filter
Narrow down by group, or type part of a tag name or value.
Read the values
Important tags include a short explanation of what they mean.
Export or clean up
Download the table, or move to the anonymiser to remove what you found.
When people use it
Finding out what a file says about you
Name, birth date, hospital and referring doctor are usually all there.
Debugging an integration
Check exactly which tags an archive or scanner is writing.
Confirming an anonymisation worked
Reload the cleaned file and check the identifying fields are gone.
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
- Binary tags such as pixel data are shown as their size rather than their contents.
- Our dictionary covers the tags that appear in practice; anything else is shown with its code and VR and marked as unknown rather than hidden.
- 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
What information is stored in DICOM metadata?
Typically the patient name, identifier, birth date and sex; the study date, description and accession number; the institution and referring physician; and a long list of technical parameters describing the equipment and the image.
What does VR mean?
Value Representation — the data type of a tag. PN is a person name, DA is a date, US is an unsigned short, and so on.
How do I read a tag code like (0010,0010)?
The first half is the group and the second the element. (0010,0010) is the patient name; every tag in group 0010 relates to the patient.
Can I remove what I find here?
Yes. The anonymiser removes the identifying fields and shows you exactly which ones it changed.