Extract text from iOS firmware signatures (SHSH2)
To convert SHSH2 signature blobs to another format, you need FutureRestore or other System software.
To convert other file formats to the "iOS Signature Blob" file type, you need software like FutureRestore or a similar tool.
.SHSH2 files are iOS firmware signature blobs. They contain digital cryptographic signatures generated by Apple to authenticate the installation of specific iOS firmware versions. Advanced users and developers rely on these files, alongside tools like FutureRestore, to downgrade or upgrade an iPhone or iPad to unsigned iOS versions.
The main disadvantage of the .SHSH2 format is its strict hardware limitation. Each file is exclusively locked to a specific device's Exclusive Chip ID (ECID) and a precise iOS version. If you miss the narrow window when Apple actively signs a firmware version, you cannot generate a valid .SHSH2 file. Furthermore, the format is highly proprietary and useless on its own. Standard desktop software cannot execute or process it.
Converting .SHSH2 files to standard media or document formats like PDF or JPG is impossible because they do not contain visual data. However, under the hood, these files use an internal XML structure. The best target formats for conversion or inspection are XML, TXT, or JSON. Converting to these text-based formats allows you to read critical parameters like the ApNonce and the generator string.
This file format is difficult to open or convert because it is a closed system file designed strictly for Apple's restore servers and specialized jailbreak utilities. Standard online converters fail because they misinterpret the data. Our analysis detects the embedded XML format, allowing you to easily view the internal text and extract the generator codes safely.
Convert.Guru analyzes your SHSH2 file, detects the exact format, and lets you read the text inside.
If you want to convert SHSH2 file to SYS, DLL, EXE, DRV, VXD, 386, COM, BAT, CMD, SCR, PIF or LNK, you can use FutureRestore or similar software from the "iOS Firmware Authorization Data" category. In the File menu, look for Save As… or Export….
To convert MSI, EXE, REG, MST, LNK, CAB, CAT, DRV, INF, SYS, MSU or DLL files to SHSH2, try FutureRestore or another comparable tool in the "iOS Firmware Authorization Data" 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 SHSH2 converter.