DICOM anonymizer online — free, private, no upload
- Strip every identifying tag — patient name, ID, birth date, institution, physician names, private vendor tags
- Single files free, no account — whole-study ZIPs use the one-time license
- Works on single .dcm files or whole study folders
- Private by design — parsing, scrubbing and re-writing all run locally
Drag & drop a DICOM folder here
a whole study at once — loose files, extensionless files and DICOMDIR work too
Your files never leave your device — everything is parsed locally in your browser.
Series
License active ✓| # | Patient | Study date | Modality | Series | Slices | Size |
|---|
Series
Scroll: slices · Drag: contrast (window) · Right-drag: pan · Ctrl+scroll: zoom · Double-click: reset · Arrow keys / PgUp / PgDn: navigate
How it works
Drop a study folder
A whole CT/MR study at once — files are parsed on the spot by JavaScript in this tab and grouped into series, in the scanner's own slice order. Nothing is uploaded, ever.
Check the metadata
Open a series and look at the metadata panel: the patient name, ID, birth date and institution shown there are exactly what the scrub removes. The image itself is untouched.
Download the cleaned study
Click "Anonymize .dcm". A single file downloads as .anonymized.dcm — free,
no license. A whole series comes back as one ZIP of cleaned files (one-time license) that
still open in any viewer or PACS.
Simple pricing
The viewer is free and unlimited — and so is anonymizing single files. Batch exports are free up to 300 files per batch; a one-time $9.99 lifts the limit: unlimited batch size — the anonymized study ZIP and the full-series PDF report at any scale.
Free
$0
- Open whole study folders, unlimited files
- Scroll slices, window/level, zoom, full metadata
- Single-slice exports: PNG, JPG, one-page PDF
- Single-file anonymizer — strip identifying tags
- Anonymized ZIPs + PDF reports up to 300 files per batch
- No account, no upload, no watermark
Lifetime license
$9.99 one-time · forever
- Unlimited batch size — whole folders with directory structure
- GB-scale studies in one export
- Whole-study anonymized ZIPs + full-series PDF reports, any size
- Pay once, use forever — no subscription
By purchasing you agree to the Terms of Service and Privacy Policy. Full refund within 14 days if it can't handle your files.
Frequently asked questions
What does the DICOM anonymizer remove?
A basic tag scrub: the patient name is replaced with "Anonymous", the patient ID is blanked, and direct identifiers are removed — birth date, sex, age, institution and department names, referring and performing physicians, accession number, study IDs, plus all private (vendor) tags, overlays and curve data. Study/series UIDs and the imaging parameters are kept so the study stays intact and consistent. The file is stamped with the standard DICOM de-identification markers (0012,0062 / 0012,0063).
Do my files get uploaded anywhere?
No — that is the whole point. The files are parsed, scrubbed and re-written entirely by JavaScript running in your browser tab; no file bytes are ever transmitted. You can verify this yourself: open your browser's developer tools (Network tab), anonymize a file, and watch — nothing is sent anywhere. Details in the privacy policy.
Is the anonymizer really free?
Single files, yes — completely: no license, no account, no file-count limit, no watermark. Anonymizing a whole study (the multi-file ZIP) is free up to 300 files per batch; bigger batches need the one-time $9.99 license, which also covers unlimited full-series PDF reports. Viewing is always free.
What does it NOT remove?
Two things, and both are called out honestly: burned-in pixel text — words the scanner drew into the image pixels themselves cannot be removed by a tag scrub — and the study/series UIDs, which are kept on purpose so all files of a study still belong together. This is a basic tag scrub, not a certified HIPAA/GDPR de-identification pipeline: review the result before sharing files externally.
Is the result still a valid DICOM file?
Yes. The cleaned file is re-written as a proper DICOM Part 10 file with the same transfer syntax, the same pixel data and the same UIDs — it re-opens in any DICOM viewer or PACS exactly like the original, minus the identifying tags.
Can I anonymize a whole study at once?
Yes — drop the whole study folder onto the page. Files are grouped into series; open a
series and click "Anonymize .dcm". A single-file series downloads as one cleaned
.dcm file, free; a multi-file series downloads as a ZIP of cleaned
.dcm files — free up to 300 files per batch, and unlimited with the one-time
$9.99 license. Everything still happens locally in your browser.
Can I use anonymized files for diagnosis?
Anonymizing changes only metadata tags, never the pixels — but DCMView is a file-format utility, not a medical device, and is not intended for diagnostic use, measurement, or treatment decisions. Always review clinical images on a regulated diagnostic workstation.