Can you convert a JPG back to RAW or DNG?
No. Nothing can, and nothing ever will. A RAW file is the unprocessed readout from a camera's sensor. A JPEG is what is left after the camera has developed that readout and thrown most of it away. Tools that offer "JPG to DNG" will hand you a valid .dng file — with your already-developed 8-bit JPEG inside it and not one bit of sensor data recovered. You get the RAW editor's interface, not the RAW editor's latitude.
What RAW actually contains
A RAW file is not an image. It is closer to a measurement log.
Each photosite on the sensor reports how much light hit it, as a number — typically 12 or 14 bits of precision. Because each photosite sits under a single red, green or blue filter, the file does not even hold colour pixels yet: it holds a mosaic of single-channel brightness readings still waiting to be interpolated into colour. Alongside that sit the camera's suggestions — white balance, picture profile, exposure — recorded as metadata and applied to nothing.
Nothing has been decided yet. That is the entire value of RAW: every choice is still open.
What making a JPEG destroys
"Developing" the RAW — whether the camera does it instantly or you do it later — runs a one-way pipeline: demosaic into colour, apply a white balance, apply a tone curve, sharpen, reduce noise, convert to 8 bits, compress with JPEG's lossy DCT. Each stage throws information away permanently.
The number that matters most is bit depth:
- A 14-bit RAW records 16,384 brightness levels per channel.
- An 8-bit JPEG records 256.
Over 16,000 levels are averaged down into 256 buckets. You cannot invent the missing 16,128 back. No algorithm, no AI and no premium tier recovers a number that was never written down.
What goes with it:
- Highlight headroom. A RAW often holds two or three stops of detail above what the preview shows — the reason a photographer can "pull back" a blown sky. In a JPEG, an overexposed sky is pure white: the pixels are 255, 255, 255. There is no cloud hiding behind them.
- White balance freedom. In RAW it is a suggestion you can change for free. In a JPEG it is baked into every pixel, and correcting a bad one means stretching data that is already thin.
- Colour resolution. JPEG usually stores colour at half the resolution of brightness — barely visible on a finished image, but gone as editable data.
- Clean gradients, and the sensor-level noise data that makes good noise reduction possible.
What a "JPG to DNG" converter really produces. DNG is a container. You can legally and technically put an ordinary 8-bit image inside one, and the result is a real .dng file that your RAW editor will open without complaint.
What is inside it is the JPEG. Same 256 levels per channel. Same baked-in white balance. Same white sky with nothing behind it. Same compression artefacts, now preserved in a lossless wrapper.
The editor will show you RAW-style sliders because it sees a DNG. Those sliders will do nothing that editing the JPEG directly would not. You have changed the file's extension and its packaging, not its contents. Every "convert JPG to RAW" product on the internet is doing this, whether or not it admits it.
But AI can restore it, surely?
No, and the distinction here is the important one on this page.
AI upscalers, denoisers and "RAW recovery" tools do something genuinely impressive: they look at a degraded image, consult everything they learned from millions of other images, and synthesise plausible detail to fill the gaps. The output can look better. Sometimes it looks a great deal better.
But it is invention, not recovery. The model is not reading data out of your file that was hidden there — it is guessing what was probably there, based on what usually is. When it reconstructs the texture of a blown-out sky, it is painting a sky it made up. That may be exactly what you want for a family photo. It is not the same thing as recovering your sky, and it must never be treated as such where the truth of the image matters — journalism, evidence, science, insurance, anything factual.
Recovery reads what is there. AI writes what is likely. Only one of those is your photograph.
What to do instead
If you still have the original RAW, use it. Obvious, and worth checking — if you shot ProRAW or used a RAW-capable camera app, the .dng is probably still in your library next to the JPEG you have been editing.
If all you have is the JPEG, edit the JPEG — but stop compounding the damage. The real risk now is generation loss: every time you open a JPEG, edit it, and save it as a JPEG, it is re-compressed and gets slightly worse. Convert it once to 16-bit TIFF (or PNG) and do your editing there. That does not recover anything — nothing does — but it stops each save from taking another bite, and it gives your edits somewhere to breathe. Export a JPEG at the end.
If you want RAW next time, shoot RAW. On iPhone, Settings > Camera > Formats and enable Apple ProRAW (Pro models), then tap RAW in the Camera app. It writes a genuine DNG with real sensor data. Any third-party camera app that offers RAW capture does the same. This is the only way to have a RAW file: to have recorded one.
What Convexy does — and does not. It converts RAW and DNG into JPG, PNG, TIFF, HEIC and WebP. It develops the sensor data into a finished image. It does not offer JPG to RAW, and it will not, because that operation does not exist: raw sensor data cannot be manufactured from a developed picture. An app offering it would be selling you a file extension.
Common questions
Can you convert a JPG to RAW or DNG?
No. RAW is unprocessed sensor data, and producing a JPEG discards it permanently — 14 bits per channel become 8, white balance is baked in, and highlights are clipped away. A tool can wrap your JPEG in a DNG container and hand you a valid .dng file, but nothing inside it has been recovered. You get RAW packaging, never RAW data.
What does a JPG-to-DNG converter actually give me?
A DNG file containing your already-developed 8-bit JPEG. Your RAW editor will open it and show you RAW-style sliders, but they have no more data to work with than the JPEG did — the same 256 levels per channel, the same baked-in white balance, the same clipped highlights. It is repackaging, not conversion.
Can AI recover RAW data or restore a blown-out sky?
No. AI tools synthesise plausible detail based on what they have learned from other images — they are inventing, not recovering. The output can look better, sometimes much better, but where a sky is clipped to pure white the original data is not hidden in the file, it is absent. An AI-reconstructed sky is a sky the model made up. Fine for a family photo; never acceptable where the image has to be true.
Can I recover blown highlights in a JPG?
No. Clipped highlights in a JPEG are pixels with the value 255, 255, 255 — pure white, with no information behind them. RAW files often hold two or three stops of headroom above the visible preview, which is what makes highlight recovery possible there. A JPEG has none. Pulling the highlights slider down just makes the white area grey.
Is DNG the same thing as RAW?
DNG is Adobe's open, standardised RAW container. A DNG straight out of a camera holds genuine sensor data, so it is RAW in every meaningful sense. But DNG is a container, and a container can be filled with anything — including an ordinary 8-bit image, which is exactly the loophole "JPG to DNG" converters use. The extension tells you the packaging, not the contents.
How do I shoot RAW on an iPhone?
On Pro models, go to Settings > Camera > Formats and turn on Apple ProRAW, then tap the RAW button in the Camera app before shooting. That writes a real DNG with genuine sensor data. Third-party camera apps offer RAW capture too, including on non-Pro models. Recording a RAW is the only way to have one.