DICOM to JPG / PNG converter
Turn a slice of a DICOM or NIfTI scan into a shareable JPG or PNG image — entirely in your browser. Pick the plane and slice, then download. Nothing is uploaded.
Load a DICOM folder or a NIfTI file below, pick a plane and slice, then download it as a JPG or PNG. Everything stays in your browser.
Opens: A folder of DICOM (.dcm) files, or a NIfTI (.nii / .nii.gz) volume. · Files are processed in your browser — nothing is uploaded.
What this tool does
Reads a DICOM folder or a NIfTI file
Point it at a whole DICOM series — extensionless and UID-named files included — or hand it a .nii/.nii.gz volume. Both take the same in-browser decoding path as the viewer.
Pick the plane, then the exact slice
Switch between axial, coronal and sagittal and scrub to the slice you want. Because the volume is reconstructed rather than replayed, you can export a coronal image out of an axially acquired scan.
PNG or JPG, from the same view
PNG is lossless and the better choice for anything a clinician will look at closely. JPG is smaller, which matters for email, a messaging app or a portal upload with a size limit. Both export the slice you are looking at; the JPG is written at quality 95.
No patient identity in the output
The exported image contains the pixels of the slice and nothing else — DICOM tags are not rendered onto it or embedded in it. The exception worth checking by eye: text burned into the image pixels by the scanner is part of the picture and comes out with it.
Runs entirely in your browser
Decoding is WebAssembly, rendering is WebGL2, and the image file is generated on your device. Nothing is uploaded — not the scan, and not the converted image.
What it does not do
One slice per export: there is no batch that writes out every slice of a series as numbered images. The export is the rendered view at the size of the on-screen canvas, with your current window and colormap baked in — a picture for sharing, not a lossless copy of the original pixel matrix at its native bit depth.
How to use it
- 1.Drop a DICOM folder or a NIfTI file onto the panel (or use the file button).
- 2.Choose the plane (axial, coronal, sagittal) and scrub to the slice you want.
- 3.Click “Download JPG” or “Download PNG” to save that slice as an image.
FAQ
- Are my images uploaded to convert them?
- No. The scan is decoded and rendered locally in your browser (WebAssembly + WebGL); the exported JPG/PNG is generated on your device and never leaves it.
- JPG or PNG — which should I choose?
- PNG is lossless and best for sharing with a doctor; JPG is smaller for email or messaging. Both export the exact slice you are viewing.
- Does the image contain patient identity?
- The exported image is just the pixels of the slice — DICOM identity tags are not rendered or embedded. Always double-check before sharing.
Want your scan explained in plain language?
The viewer is free — and so is understanding your radiologist’s report. Create an account, upload your scan (de-identified in your browser) and your report, and every finding is mapped onto the images, explained in plain language and scored — no card needed. An independent AI reading of the images is a paid extra. Informational only — not a medical diagnosis.