No installation. No image upload. No account.
Drag and drop your DICOM or NIfTI file — it opens in seconds,
entirely in your browser. Your imaging data is never sent to any server.
Typical Online Viewer requires downloading a .exe and admin rights on a hospital computer. Scan Instant opens in any browser — Chrome, Safari, Edge — in under 5 seconds.
Desktop DICOM tools are Windows-only. Scan Instant is mobile-first. A doctor can open a scan while walking between patients, in a taxi, or at home on the couch.
Files are parsed entirely in your browser using JavaScript. Your imaging data is never uploaded to any server. Anonymous usage analytics help us improve the tool.
"Designed for the doctor who has 30 seconds between patients."
SCAN INSTANT · CLINICAL UTILITY
No training required. If you can use a smartphone, you can use Scan Instant.
Open Scan Instant in any browser on any device. No download, no account, no waiting. The app is ready in under 5 seconds.
Drag and drop a DICOM file, a NIfTI file, or a ZIP folder from a hospital CD. The scan loads instantly, entirely on your device.
Scroll through slices, adjust window/level, measure distances, annotate, and export a PNG or findings report — all in the browser.
Scan Instant supports all standard DICOM and NIfTI formats — not just MRI.
Supports DICOM files from hospital CDs (ZIP folders), extensionless DICOM files, implicit and explicit VR transfer syntaxes. Ultrasound files in JPEG-compressed format are not currently supported.
Professional tools, zero complexity. Built for the 10-second use case.
One-click presets for Brain, Soft Tissue, Lung, Bone, Liver, Abdomen, and Angio — or drag to adjust manually.
Calibrated ruler tool with real-world millimetre measurements using DICOM pixel spacing data.
Draw a region of interest and get instant pixel statistics — mean, min, max, standard deviation.
Auto-scroll through slices like a video — essential for reviewing cardiac or dynamic sequences.
Load two series and compare them simultaneously — useful for before/after or multi-sequence review.
Generate a structured HTML findings report with patient info, scan metadata, and your annotations.
Save any slice as a high-quality PNG with the current window/level and annotations applied.
Save your session metadata as JSON and restore it later — annotations, window settings, and slice position included.
Compared to the most common desktop DICOM tools.
| Feature | Typical Online Viewer | Specialist Research Viewer | Scan Instant |
|---|---|---|---|
| Platform | Windows desktop only | Desktop (C++ / Linux) | Any device — web browser |
| Setup | Install required (admin rights) | Compile from source / dependencies | ✓ Zero install — open a link |
| Mobile | ✗ No | ✗ No | ✓ iPhone, Android, tablet |
| Privacy | Local only | Local only | ✓ Images stay local — no server upload |
| Speed to view | Minutes (install + load) | Minutes (compile + configure) | ✓ Seconds (drag and drop) |
| Target user | Radiologists / power users | MR spectroscopy researchers | GPs, surgeons, patients, all doctors |
| Cost | Free (Windows only) | Free (complex setup) | ✓ Free — no account needed |
From the radiologist reviewing a study to the patient who just received a CD from the hospital.
Doctors who need to review a scan quickly, outside of their hospital PACS system — on any device, anywhere.
Anyone who has received a DICOM file and needs to open it — without installing software or uploading to a cloud service.
No account. No install. No upload. Just open the link and drag the file.
⊕ OPEN SCAN INSTANT NOWFREE · WORKS IN ANY BROWSER · YOUR DATA STAYS ON YOUR DEVICE