How to open a .BK file online
Three steps, a few seconds, no Office licence.
Choose your .BK file
Drag your .BK file onto the box, or click Choose file.
Supported
Your .BK file is checked and laid out as a clean page right.
Read, search, save
Jump between headings, find any word, print it, or save the text as HTML or TXT.
What is a .BK file?
Everything worth knowing about Adobe FrameMaker Book File files.
A BK file is most often an Adobe FrameMaker Book file - a collection file that ties a publication's chapters, table of contents, and index together. Open it in Adobe FrameMaker. There is no free viewer, so if you do not own FrameMaker, ask the sender for a PDF export. Note that .bk is also used as a generic backup extension (like .bak), so check what program created the file first.
Programs that open .BK files
| Full name | Adobe FrameMaker Book File |
|---|---|
| Developer | Adobe Systems (originally Frame Technology) |
| First released | FrameMaker book feature (late 1980s/1990s); .bk was the DOS/8.3 short form of .book |
| Category | Documents |
| MIME type | application/octet-stream |
Related viewers
Free, no sign-up.
Is my .BK file uploaded anywhere?
No. Your .BK file is read and converted for you. The first time, a small open-source conversion component is downloaded and then cached.
Why does my older .BK file look plain?
Some older word-processor files keep their formatting in a complex binary layout. The viewer shows all the text and tables reliably; richer formatting for those files is coming with server-side conversion.
Are macros in a .BK file safe here?
Yes. The viewer never runs macros. It only reads the document text, styles and images, and tells you when a file contains macros.
Can I edit my .BK file?
This is a viewer. You can copy the text or save it as HTML/TXT and edit it elsewhere. An online editor is on our roadmap.
It says my .BK file is something else. Why?
We check the file's signature, not just its name. If a file was renamed, the viewer tells you what it really is and which tool opens it.
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