OpenAnyFile
What is a .cb7 file?
Comic Book Archive (7z) is an eBook format developed by Comic reader community. It is usually created by Comic readers, CDisplay.
A 7-Zip archive of page images read in filename order — opened here as a readable comic.
File details
| Full name | Comic Book Archive (7z) |
|---|---|
| Category | eBooks |
| MIME type | application/x-cb7 |
| Signature (magic bytes) | 37 7A BC AF 27 1C |
| Developer | Comic reader community |
| Opens with | Archive engine |
| Uploaded? | No — read locally in your browser |
How to open a .cb7 file
OpenAnyFile routes .cb7 files to its archive engine, which shows a browsable listing of everything inside.
- Drop your .cb7 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 archive engine.
- Use fullscreen for a closer look, check its checksums, or download it back unchanged.
What works — and what does not
Works
Viewing and inspecting: a browsable listing of everything inside. Size, type, signature and checksums are always shown.
Does not work
Editing and saving back. OpenAnyFile is a viewer, not an editor — for changes you still need the original app.
Is it safe to open a .cb7 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 .cb7 files
Can I open a .cb7 file without installing software?
Yes. OpenAnyFile opens .cb7 files in your browser using its archive engine. You get a browsable listing of everything inside, with nothing installed and no account.
How do I know a file is really a .cb7 file?
Check its first bytes instead of its name. A genuine CB7 file begins with 37 7A BC AF 27 1C. OpenAnyFile shows the detected type, so a renamed file is easy to spot.
Is my .cb7 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.