Extract text from ReadyBoost cache files (SFCACHE)
To convert SFCACHE cache files to another format, you need Microsoft Windows or other System software.
To convert other file formats to the "Cache File" file type, you need software like Microsoft Windows or a similar tool.
The .SFCACHE file is a specialized system archive generated by Microsoft Windows for its ReadyBoost and SuperFetch (now SysMain) features. These files typically appear on external USB drives or SD cards functioning as supplemental RAM caches to accelerate system performance. Because the file contains a raw, compressed, and AES-128 encrypted snapshot of memory pages, it is not designed to be opened or converted into human-readable documents like DOCX or PDF.
Users often encounter friction when trying to manage these files: they are large (often consuming the entire external drive), locked by the "System" process (preventing deletion), and display as gibberish if forced open in text editors like Notepad++. Since the data is encrypted per-session, "converting" an .SFCACHE file to a usable image or text document is technically impossible. However, for forensic analysis or disk cleanup, the pragmatic workaround is to "convert" the file into Free Space by disabling ReadyBoost, or view its raw structure using a Hex Editor. For archiving system states, forensic experts may convert the container into a raw binary BIN dump.
Convert.Guru analyzes your SFCACHE file, detects the exact format, and lets you read the text inside.
Users also converted HDMP, EXE and PNG files.
If you want to convert SFCACHE file to CSV, JSON, XML, YAML, YML, TOML, INI, CFG, CONF, DAT, DB or SQL, you can use Microsoft Windows or similar software from the "System Memory Cache" category. In the File menu, look for Save As… or Export….
To convert DBF, XML, SQLITE, XLSX, SQL, TSV, ACCDB, YAML, MDB, CSV, ODS or JSON files to SFCACHE, try Microsoft Windows or another comparable tool in the "System Memory Cache" 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 SFCACHE converter.