DICOM to JPG converter
Turn .dcm images into ordinary JPEG pictures. The conversion runs in your browser, so the files stay on your device.
For sharing and slides, not diagnosis. A JPG has only 256 grey levels and no measurement data. See the medical disclaimer.
Drop .dcm files here, or
Files stay on this device. Several files are stacked by instance number. Folders: drag the files inside.
Drag on the image to change window/level (left–right = width, up–down = centre). Scroll the wheel or use ↑/↓ to move through images.
Export
The JPG is rendered with the window/level you see now. Colour images are exported as they are.
How to convert
- Choose your .dcm files (a whole series at once is fine) or drop them on the box.
- Set the window/level until the image looks right. The JPG is saved with exactly what you see.
- Pick a quality (92 is a good default), then download one image, or all of them as a .zip.
What changes when DICOM becomes JPG
- Grey levels are cut to 256. A CT or MR slice usually holds 12 to 16 bits per pixel. The window you choose decides which part of that range survives; everything outside it turns pure black or white. Export again with another window if you need to show lung and bone separately.
- Pixel values and units are lost. A JPG cannot tell you a Hounsfield value, and JPEG compression changes pixels slightly.
- No DICOM tags are written to the JPG. Patient name, ID and dates are not copied into the file. Text that was burned into the pixels (some ultrasound, X-ray and secondary-capture images carry it) is still in the picture.
- File names come from the originals. If a source file name contains a patient name, rename the output before you share it.
- Colour images (ultrasound, secondary captures, endoscopy) are exported as they are, and window/level does not apply to them.
- Multi-frame files are exported frame by frame, named
-f1,-f2and so on.
Formats
Uncompressed, RLE, baseline-JPEG, JPEG 2000 and JPEG-LS DICOM files convert. Files in other compressed formats are skipped with a note and counted in the summary; the viewer lists the full status. Only open files you have the right to open, and follow your local rules for patient data even though nothing is uploaded.