You can easily anonymize or de-identify DICOM files with MicroDicom DICOM Viewer.
Anonymize currently opened images:
1. Open DICOM images in MicroDicom DICOM Viewer.
2. Go to File menu/Anonymize
3. Choose for example "Current image".
4. Select folder dialog will be shown to choose where you want to anonymize DICOM images to be saved.
5. Done
Batch anonymize a folder with DICOM images:
1. Go to File menu/Batch/Anonymize
2. Choose source folder that contains DICOM images.
3. Choose destination folder.
4. Click Anonymize button.
5. Done
You can look in our video tutorial how to anonymize DICOM images: