Click the "Select File" button above, and choose your HBK file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert HBK to another file type
To convert your HBK file to another format, you need HTC Sync Manager or other Backup software.
Convert a file to HBK
To convert other file formats to the "Mobile Archive" file type, you need software like HTC Sync Manager or a similar tool.
About HBK files
The .HBK extension represents two distinct proprietary backup formats that often frustrate users due to their inability to be opened by standard software.
HTC Mobile SMS Backup: Created by older HTC smartphones (like the One M8 or Desire series) and the now-defunct HTC Sync Manager. These files store text messages (SMS) and multimedia messages (MMS) in a binary database format. Users typically encounter these files when trying to recover old messages from a computer backup after they no longer have the physical HTC phone. The main challenge is that .HBK files are unreadable by text editors like Notepad and cannot be directly imported into modern Android phones (which use XML). To make the data usable, users must convert them to PDF for printing or CSV/TXT for archiving.
Synology Hyper Backup: A backup archive generated by Synology DiskStation Manager (DSM) using the Hyper Backup tool. While it may appear as a single file on some systems, it is often a directory structure containing data chunks and .BKPI index files. The format is designed for efficiency (deduplication/compression) rather than accessibility, meaning users cannot simply double-click to view files. To access the contents without a Synology NAS, you must use the Synology Hyper Backup Explorer to extract (convert) the data back to its original format.
Convert.Guru analyzes your HBK file, detects the exact format, and lets you read the text inside.
If you want to convert HBK file to TXT, RTF, DOC, DOCX, ODT, PAGES, TEX, LATEX, MD, MARKDOWN, LOG or NFO, you can use HTC Sync Manager or similar software from the "Mobile SMS Backup" category. In the File menu, look for Save As… or Export….
To convert PDF, DOC, ASC, TODO, NFO, MEMO, README, DOCX, JPG, TXT, NOTE or RTF files to HBK, try HTC Sync Manager or another comparable tool in the "Mobile SMS Backup" category.
The HBK Converter Story
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our HBK converter.