DICOM to PNG Converter
Processing entirely on your device — large files may take a moment.
DICOM Medical Image and PNG Image exist for different jobs: DICOM is the ISO standard for medical imaging — CT/MRI slices carry patient metadata, window/level display parameters and pixel data in one file. Only uncompressed transfer syntaxes are supported. Convert to PNG when you need lossless quality or a transparent background — for logos, UI screenshots and line art.
This converter runs entirely in your browser using WebAssembly — your files never leave your device, nothing is uploaded, and there are no watermarks, sign-ups or queues. Drop in several files at once to convert them as a batch.
How to convert DICOM to PNG
- 1
Select your files
Drag & drop your DICOM files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to PNG". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted PNG file individually, or grab everything at once as a ZIP archive.
About the DICOM format
DICOM is the ISO standard for medical imaging — every CT/MRI slice bundles patient metadata, display parameters (window centre/width) and pixel data. The converter renders uncompressed transfer syntaxes through proper window/level mapping, exactly as a workstation would show it.
Patient and study metadata (name, ID, modality, date) are exported alongside the image as a text sidecar. Compressed transfer syntaxes (JPEG inside DICOM) are out of scope and reported clearly.
+ Strengths
- ✓Correct window/level greyscale mapping
- ✓Metadata exported as a text sidecar
- ✓MONOCHROME1/2, RGB and rescale handled
! Limitations
- −Compressed transfer syntaxes unsupported
- −Multi-frame volumes take the first frame
- −Huge CT stacks render slice by slice
About the PNG format
PNG was created in 1996 as a free, open replacement for the patent-encumbered GIF, and it has been the reference lossless image format ever since. Pixels are compressed with the DEFLATE algorithm (the same one inside ZIP files), which reproduces the original image exactly — bit-for-bit — while supporting full 8-bit or 16-bit alpha transparency. Screenshots, logos, icons, charts and anything with text or sharp edges should live in PNG.
Because it never discards information, PNG files of photographs are several times larger than JPG — that is the price of perfection. Modern PNG encoders add filters per scanline that make screenshots and flat-color graphics compress surprisingly well. PNG also became the base of APNG, the animation extension that browsers play natively.
+ Strengths
- ✓Truly lossless — every pixel survives exactly as it was
- ✓Full alpha transparency with smooth edges, not 1-bit masks
- ✓Open standard, unpatented, with excellent tooling everywhere
- ✓Ideal for text, line art and flat-color graphics — sharp edges stay sharp
! Limitations
- −Photographs become several times larger than JPG
- −Base format has no animation (that is the APNG extension)
- −16-bit or high-resolution PNGs can grow very heavy
Why convert DICOM to PNG?
Converting makes sense where the strengths of PNG meet what DICOM cannot give you. Truly lossless — every pixel survives exactly as it was Meanwhile Compressed transfer syntaxes unsupported One pass through the converter above puts your file on the right side of that trade-off.
Frequently asked questions
Is this DICOM to PNG converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Will I lose quality converting DICOM to PNG?
No — PNG is a lossless format, so every pixel of the converted image matches your original DICOM file. You can also adjust the quality/size balance before converting when the target format supports compression.
Can I convert several DICOM files at once?
Yes — drop as many files as you like into the tool and they are converted in one batch. When more than one file comes out, everything is bundled into a ZIP for a single download.
Will transparent areas survive the conversion to PNG?
Transparency is kept whenever PNG actually supports an alpha channel. If the target format has none (like JPG), transparent areas are flattened onto a white background — that is a property of the format, not of this tool.