Convert DICOM to JPG
An X-ray, CT or MRI image as an ordinary picture. For viewing, not for diagnosis.
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How it works
Add your images
Drag and drop, paste, or pick files. They upload over an encrypted connection.
Pick a quality or a target size
Use the quality slider, or tell it exactly how many KB or MB you need.
Download
Save each file, or grab them all at once as a ZIP.
DICOM is the format hospitals and scanners use for medical images. A .dcm file from an X-ray, a CT, an MRI or an ultrasound holds the picture together with data about the patient and the examination. Ordinary image viewers cannot open it, which is a problem when you have been handed your own scan on a disc and want to look at it. Add the file here and get a JPG.
The file is read with DCMTK, a long-established open-source DICOM toolkit. Medical images usually hold far more shades of grey than a screen can show, and each file says which range of them matters, its window. That window is applied. If the file names none, the full range from darkest to brightest value is used.
Please read this part. A JPG made here is a picture for looking at, explaining and keeping. It is not a medical image any more: the measurement values, the calibration and the ability to change the window are gone. It must not be used to diagnose anything. For that, the original DICOM files and a medical viewer in the hands of a professional are needed.
Patient data in the file
A DICOM file normally contains the patient's name, date of birth and ID, the hospital, the referring doctor and the date. None of that is copied into the JPG, which holds the picture only. Many scanners, though, print the name and date into the corner of the image itself. Text that is part of the pixels stays. Check the JPG, and crop it in the editor if it shows something you do not want to share.
The upload travels over an encrypted connection, is processed on our own servers and is deleted when the JPG has been returned. It is not passed to anyone else. Even so, think about whether a medical image should leave your computer at all, and ask whoever gave it to you if you are unsure.
Series, slices and frames
A CT or MRI examination is hundreds of images, usually one file per slice, sometimes many frames in one file. This page converts one file at a time. When a file holds several frames, the first is shown and a page field appears in the editor to choose another; a button downloads every frame as a ZIP. To convert a folder of single-slice files, add them together as a batch.
Why the picture may look dark or flat
A CT stores densities from air to bone in thousands of steps. A window picks a narrow band, for lungs or for bone, and spreads it across the screen's greys. The JPG shows the one window the file specified. A radiologist switches between several; a JPG cannot. If your picture looks too dark, that window was probably meant for another tissue. A DICOM viewer can change it; this page cannot.
What is and is not supported
Greyscale and colour images are read, compressed or not, including the JPEG and JPEG-LS encodings common in DICOM. Structured reports, presentation states and other DICOM objects that are not images have no picture to convert. The file names on a hospital disc often have no ending; rename the file to end in .dcm so that it is recognised.
Frequently asked questions
Can I use the JPG for a diagnosis or a second opinion?
No. Give the doctor the original DICOM files. The JPG lacks the data a diagnosis depends on.
Is my name removed from the image?
The data fields are not copied. A name that the scanner drew into the picture remains visible and has to be cropped away.
How do I convert a whole CT series?
Add the files together as a batch, or, for one multi-frame file, download all frames as a ZIP from the editor.
My files have no extension. What now?
Rename one to end in .dcm and add it. Files on hospital discs are often named without an ending.
Can I convert to PNG to avoid JPG loss?
Yes. Choose PNG in the editor. It keeps the 8-bit picture exactly, though still not the original measurement values.
Is this free?
Yes, within the free plan's file size and batch limits.