Click the "Select File" button above, and choose your O file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert O to another file type
To convert your O file to another format, you need GCC or other Developer software.
Convert a file to O
To convert other file formats to the "Intermediate Build Artifact" file type, you need software like GCC or a similar tool.
About O files
The .O file extension represents a Compiled Object File, a critical intermediate artifact in software development. These files contain machine code, symbol tables, and relocation data generated by compilers like GCC or Clang before the linking stage. Users typically encounter these files when a build process fails or when attempting to manually compile software. The main 'problem' is that a .O file is not a standalone executable; it is a puzzle piece waiting to be connected. You cannot double-click to run it, nor can you open it in a text editor like Notepad. For execution, the file must be processed by a linker (like ld) to create a final executable (A.OUT, EXE, or ELF). For analysis or reverse engineering, developers convert these files into assembly code using tools like objdump or view structure with readelf.
Convert.Guru analyzes your O file, detects the exact format, and lets you read the text inside.
If you want to convert O file to JS, TS, PY, JAVA, CPP, C, CS, PHP, RB, GO, RS or SWIFT, you can use GCC or similar software from the "Compiled Object Code" category. In the File menu, look for Save As… or Export….
To convert SH, PY, KT, PS1, SWIFT, LUA, PL, JAVA, SCALA, JS, VBS or TS files to O, try GCC or another comparable tool in the "Compiled Object Code" category.
The O 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 O converter.