OpenAnyFile
What is a .prc file?
Mobipocket eBook is an eBook format developed by Mobipocket, first released in 2000. It is usually created by Mobipocket Reader, early Kindles.
A Palm database containing a MOBI book. DRM-free books' text is decompressed right here in the browser.
File details
| Full name | Mobipocket eBook |
|---|---|
| Category | eBooks |
| MIME type | application/x-mobipocket-ebook |
| Signature (magic bytes) | 42 4F 4F 4B 4D 4F 42 49 (BOOKMOBI) at offset 60 |
| Developer | Mobipocket |
| Introduced | 2000 |
| Opens with | EBook reader |
| Uploaded? | No — read locally in your browser |
How to open a .prc file
OpenAnyFile routes .prc files to its eBook reader, which shows the book text, decompressed locally.
- Drop your .prc 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 eBook reader.
- 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 book text, decompressed locally. Size, type, signature and checksums are always shown.
Does not work
Original layout and styling. The text is extracted; fonts, positioning and page design are not reproduced.
Is it safe to open a .prc 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 .prc files
Can I open a .prc file without installing software?
Yes. OpenAnyFile opens .prc files in your browser using its eBook reader. You get the book text, decompressed locally, with nothing installed and no account.
How do I know a file is really a .prc file?
Check its first bytes instead of its name. A genuine PRC file begins with 42 4F 4F 4B 4D 4F 42 49 (BOOKMOBI) at offset 60. OpenAnyFile shows the detected type, so a renamed file is easy to spot.
Is my .prc 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.