Extract text from Qt compressed help files (QCH)
To convert QCH help files to another format, you need Qt Assistant or other Developer software.
To convert other file formats to the "Compressed Help File" file type, you need software like Qt Assistant or a similar tool.
The .QCH file format is primarily known as a Qt Compressed Help file. It is utilized by the Qt framework to package HTML documentation, stylesheets, images, and indexing data into a single, searchable container. A secondary, much rarer use case (making up roughly 4% of files) is as a Name Generator List file for the legacy software Everchanging Book of Names (EBoN).
Under the hood, Qt Compressed Help files are actually SQLite databases that store compressed binary blobs. This architecture makes them highly efficient for offline search and retrieval within Qt Assistant or Qt Creator. However, it introduces significant real-world limitations. The format is tightly coupled to the Qt ecosystem. You cannot natively open a .QCH file in a standard web browser, nor can you read it with a normal document viewer. Users often face extreme frustration when a developer shares a software manual as a .QCH file, because it typically requires downloading and installing a bulky developer toolkit just to read the text.
The most practical solution is converting the file to universally accessible formats like HTML, PDF, or TXT. Unfortunately, because this file format is an intricate SQL database wrapper containing compressed proprietary payloads, standard online converters will instantly fail to process it. Often, only the original Qt software or specialized extraction scripts can properly read or export the structured data.
However, you don't need to install a massive SDK immediately. If our analysis detects a supported underlying or embedded format - such as exposed SQLite tables or unencrypted HTML strings - viewing or conversion may still be possible directly from your browser.
Convert.Guru analyzes your QCH file, detects the exact format, and lets you read the text inside.
Users also converted QHC, 21O and GUT files.
If you want to convert QCH file to , you can use Qt Assistant or similar software from the "Qt Documentation Database Storage" category. In the File menu, look for Save As… or Export….
To convert files to QCH, try Qt Assistant or another comparable tool in the "Qt Documentation Database Storage" category.
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 QCH converter.