UltKit

DNG to PNG Converter

Develop DNG raw photos into PNG files that any editor, slide app or browser opens, with no compression artifacts added on the way. Upload the raws, keep the defaults and download.

Image Converter

or drop JPG, JPEG, JPE … files here ·

Max 95 MB per file· Up to 20 files· Deleted after 30 minutes

Output

Files are processed on our servers and deleted after 30 minutes.

How to use this tool

  1. 1

    Upload the DNG files

    Drop up to 20 .dng files, 95 MB each, from a camera, an iPhone in ProRAW mode or an Android phone's Pro mode.

  2. 2

    Leave PNG selected

    Convert to is already set to PNG. Under Advanced settings you can resize the output or keep camera metadata by unticking Strip metadata.

  3. 3

    Convert and download

    Press Convert to PNG. Each raw comes back as a developed, full-resolution PNG, or as one ZIP for the batch.

A DNG is a digital negative; a PNG is a lossless print of it that every app can open without raw support.

DNG to PNG: a lossless copy you can open anywhere

Adobe published the Digital Negative specification in 2004 as an openly documented raw format built on TIFF, so that photos would not depend on one camera maker's software. Leica, Pentax and Ricoh cameras write DNG natively, Apple's ProRAW (introduced with iOS 14.3 on the iPhone 12 Pro) is a DNG, and Android phones save their Pro mode raws as DNG too. Adobe's free DNG Converter turns other brands' raws into it as well.

The catch is that a raw file is sensor data, not a finished picture. Design tools, slide apps, many browsers and most upload forms cannot read it. PNG solves that without adding the 8 × 8 block artifacts of JPG, which matters if you plan to cut out a subject, retouch fine detail or overlay text and save several more times.

Use PNG for working files and DNG to JPG for sharing. Both start from the same developed image; they differ only in how the pixels are stored.

How a raw DNG is developed into PNG pixels

  1. Read the raw

    The DNG's sensor data and the white balance recorded at capture are loaded.

  2. Develop

    Color is reconstructed from the sensor's color filter, a tone curve is applied and colors are mapped to sRGB.

  3. Save PNG

    Pixels are stored with lossless compression at the full sensor resolution, unless you set a size under Resize output.

Bit depth: 12-bit raw data, 16-bit PNG and what a screen shows

Adobe publishes the DNG format
2004
Typical raw data per photosite
12–14 bit
Most a PNG can store per channel
16 bit
Per channel in a typical web image
8 bit

DNG

Digital Negative

DNG is an openly documented raw image format introduced by Adobe in 2004. It is based on TIFF and can store raw sensor data from any camera, along with metadata and an embedded preview, in either lossless or lossy compressed form. Some cameras and many smartphones, including iPhone ProRAW and Google Pixel, save DNG directly, and Lightroom can convert other raw formats to it for archiving. Plain viewers may only show the preview, and editing needs raw-capable software.

Compression
Lossy or lossless
Transparency
No
Animation
No
Introduced
2004 · Adobe
DNG converter

PNG

Portable Network Graphics

PNG is a lossless raster format published in 1996 by the PNG Development Group and later standardised by the W3C and ISO. It keeps every pixel exactly, supports full alpha transparency and handles text, sharp edges and flat colours without artefacts. That precision makes it ideal for screenshots, logos, icons and interface graphics. The trade-off is size: photographs saved as PNG are often several times larger than the same photo as JPEG or WebP. All browsers, operating systems and editors open PNG files.

Compression
Lossless
Transparency
Yes
Animation
No
Introduced
1996 · PNG Development Group
PNG converter

DNG goes to PNG when a raw photo needs to become an editable, artifact-free picture for compositing, annotation or design work in software that cannot read raw files; JPG is the lighter choice when the photo is simply being shared.

DNG to PNG file size, and when TIFF fits better

PNG can hold up to 16 bits per channel, but browsers, social sites and most office apps work at 8 bits, and the PNG produced here is developed for screens in sRGB. If you plan heavy grading, such as pulling back blown highlights or lifting deep shadows, do that in a raw editor like Lightroom, darktable or RawTherapee and export a 16-bit TIFF; the raw data has latitude a developed file no longer has.

Expect large files. Lossless compression works well on flat graphics and poorly on photographic grain, so the PNG of a 12 MP photo is commonly 15–25 MB, and it can be bigger than the DNG it came from, because many DNGs store compressed raw data with only one value per photosite instead of three. That is the price of zero loss. If a PNG is headed for a web page, set Resize output to a width such as 2048 px; our explainer on JPG, JPEG and PNG covers when a lighter format makes more sense.

DNG to PNG questions

When is PNG a better target than JPG for a DNG photo?

Pick PNG when the picture will be edited again, cut out, composited or annotated, because every later save stays lossless. For sharing a finished photo, DNG to JPG gives a file a fraction of the size that looks the same on screen.

Why does my PNG look different from the preview in Lightroom?

Lightroom applies its own camera profile plus any edits you made, and edits kept in a Lightroom catalog are not part of the DNG you upload. The converter develops the raw data with neutral settings, so expect a flatter starting point that you can grade afterwards.

Is a PNG made from a DNG still a raw file?

No. Developing bakes white balance, exposure and color into ordinary RGB pixels, and the extra latitude of the sensor data is gone. Keep the DNG as your negative and treat the PNG as a print from it.

Can I convert a whole shoot of ProRAW files at once?

Up to 20 per batch, each up to 95 MB. A ProRAW DNG from an iPhone is commonly between about 25 MB and 75 MB depending on the resolution, so it fits; split larger shoots into several batches.

Does the PNG keep the camera and lens details?

Only if you untick Strip metadata, which is on by default to remove GPS position before images are shared. PNG has carried EXIF data in an official eXIf chunk since 2017, though not every viewer displays it.