OpenAnyFile
What is a .hdp file?
HD Photo is an image format developed by Microsoft, first released in 2006. It is usually created by Windows Photo Gallery.
The interim name for JPEG XR between Windows Media Photo and ISO standardisation. Same bytes, third extension.
File details
| Full name | HD Photo |
|---|---|
| Category | Images |
| MIME type | image/vnd.ms-photo |
| Signature (magic bytes) | 49 49 BC 01 |
| Developer | Microsoft |
| Introduced | 2006 |
| Opens with | Image decoder |
| Uploaded? | No — read locally in your browser |
How to open a .hdp file
OpenAnyFile routes .hdp files to its image decoder, which shows the picture if your browser has this codec, otherwise a full inspection of the file.
- Drop your .hdp file on the box above, click it to choose the file, or paste it with Ctrl+V.
- The real format is detected from the file's first bytes — not just its name.
- The file opens in the image decoder.
- Use fullscreen for a closer look, check its checksums, or download it back unchanged.
What works — and what does not
Works
Viewing and inspecting: the picture if your browser has this codec, otherwise a full inspection of the file. Size, type, signature and checksums are always shown.
Does not work
Guaranteed playback. It depends on your browser shipping this codec; if it doesn't, you still get the full inspection.
Is it safe to open a .hdp file online?
Here, yes — because nothing is uploaded. Most "online viewers" send your file to their server. OpenAnyFile reads it with your browser's File API and decodes it on your own device, so there is no copy anywhere else. You can check: open your browser's network tab while opening a file — no upload appears.
Questions about .hdp files
Can I open a .hdp file without installing software?
Yes. OpenAnyFile opens .hdp files in your browser using its image decoder. You get the picture if your browser has this codec, otherwise a full inspection of the file, with nothing installed and no account.
How do I know a file is really a .hdp file?
Check its first bytes instead of its name. A genuine HDP file begins with 49 49 BC 01. OpenAnyFile shows the detected type, so a renamed file is easy to spot.
Is my .hdp file uploaded anywhere?
No. The file is read locally by your browser and never sent to a server — it even works offline once the page has loaded.
Does it work on phones?
Yes — on Android and iPhone, in any modern browser. You can also install OpenAnyFile as an app.
Related formats
Other formats from the same family:
Format facts checked and page updated on September 25, 2026.