Click the "Select File" button above, and choose your R21 file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert R21 to another file type
To convert R21 split archives to another format, you need WinRAR or other Compressed software.
Convert a file to R21
To convert other file formats to the "Split Archive Volume" file type, you need software like WinRAR or a similar tool.
About R21 files
The .R21 file is a multi-volume archive file, specifically the 21st sequential part of a split RAR archive. Users create these split volumes to break massive files into smaller chunks to bypass strict upload size limits on email attachments, cloud storage, or legacy file systems like FAT32. You can open and extract these files using WinRAR or open-source alternatives like 7-Zip (see the RAR Wikipedia article for historical context). The primary disadvantage of the .R21 format is its strict dependency. It is completely useless on its own. To extract the underlying data, you must possess the base RAR file and all previous sequence volumes (like R00 through .R20) in the exact same directory. Furthermore, RAR is a proprietary, closed format, which requires third-party software and limits native support on web browsers and operating systems. The most practical solution is to extract the original contents and either use the raw files directly or repackage them into a highly compatible, universal ZIP archive. Because of the proprietary compression algorithm and the fragmented nature of split volumes, standard online converters fail to process isolated .R21 files. If our analysis detects the complete supported underlying sequence, viewing or conversion may still be possible.
Convert.Guru analyzes your R21 file, detects the exact format, and lets you read the text inside.
If you want to convert R21 file to ZIP, RAR, 7Z, TAR, GZ, BZ2, XZ, LZMA, CAB, ACE, ARJ or LHA, you can use WinRAR or similar software from the "Multi-Volume Archive Storage" category. In the File menu, look for Save As… or Export….
To convert XXE, 7Z, Z, PAK, LHA, DEB, UUE, TAR, LZH, ZIP, PKG or RAR files to R21, try WinRAR or another comparable tool in the "Multi-Volume Archive Storage" category.
The R21 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 R21 converter.