7z.039

.7z.0397-Zip archive part file

Igor Pavlov · 1999

Developer
Igor Pavlov
Category
Archives
MIME Type
application/x-7z-compressed
First Released
1999
Open Format
Yes
File Signature
Not applicable as it's a segment of a larger .7z file; the signature belongs to the main .7z format.
At a Glance
.7z.039
7-Zip archive part file

This is one part of a larger archive file created by the 7-Zip compression tool, used to break down very large files into manageable segments.

Reviewed on May 18, 2026
Compression
Compressed (Lossless)
Transparency
No
Editability
Low
Best for
Splitting large archives

Key Features

  • Segment of a multi-part 7-Zip archive
  • Used for splitting large archives into smaller parts
  • Requires all sequential parts to reconstruct the original data
  • Utilizes strong compression algorithms like LZMA2

Best For

  • Splitting very large archives into manageable, fixed-size pieces
  • Ensuring compatibility with 7-Zip's robust compression
  • Storing or transferring data that needs to be divided
  • Creating archives that fit specific media capacities (e.g., DVDs)

Less Ideal For

  • Single, small files that don't require splitting
  • Formats that require immediate random access to all parts
  • Archiving scenarios where only a few parts might be needed frequently
  • Users who prefer simpler, single-file archive formats

Common Use Cases

  • Distributing very large files that exceed email or upload limits
  • Storing large datasets or backups across multiple storage devices
  • Organizing extensive software installers or media collections
  • Facilitating partial downloads where only complete archives can be extracted

How to Open It

  1. Ensure all numbered parts of the split 7-Zip archive (.7z.001, .7z.002, ..., .7z.039) are in the same folder.
  2. Download and install 7-Zip (Windows) or Keka/The Unarchiver (macOS) or p7zip (Linux).
  3. Open the first part of the archive (usually .7z.001) using your chosen 7-Zip compatible software.
  4. The software will automatically detect and use the subsequent parts (.7z.039 included) to extract the full contents.

What is a .7z.039 file?

.7z.039 is not a standalone file format but rather a segment of a larger multi-part archive created by the 7-Zip compression program. When a file or a collection of files is too large to fit into a single archive, 7-Zip can split it into smaller, numbered parts. This specific file, .7z.039, represents the 39th part of such a split archive. To access the contents, all parts of the archive must be present in the same directory and opened with a compatible 7-Zip application, which will then reconstruct the original data.

Programs That Open .7z.039 Files

PlatformProgram
Windows7-ZipFreeOfficial
macOSKekaPaid
The UnarchiverFree
Linuxp7zipFree
AndroidRARFree
7ZipperFree
iOSiZipFree
Documents by ReaddleFree
Web BrowserezyZipFree

Common Problems with .7z.039 Files

⚠️ Missing one or more archive parts
Ensure all sequentially numbered parts (.7z.001, .7z.002, ..., .7z.039) are in the same directory before attempting to open the first part.
⚠️ Archive seems corrupted after extraction
Re-download or transfer all parts again, as corruption in even one part can affect the entire archive. Check file integrity if possible.
⚠️ Inability to open the archive
Verify you are using a compatible archive utility like 7-Zip, Keka, or p7zip, and that you are trying to open the first file in the sequence (e.g., .7z.001).

Frequently Asked Questions

Do I need to open .7z.039 directly?

No, you should open the first part of the split archive (usually .7z.001). The software will automatically find and use the other parts, including .7z.039.

What happens if I'm missing .7z.039?

If any part of the split archive is missing, you will not be able to extract the entire original file or set of files. You'll need to obtain the missing part(s).

Can I use .7z.039 on its own?

No, it is only a segment of a larger archive and has no independent function.

Technical Details

The .7z.039 file is a component of a split 7-Zip archive. The primary archive format is .7z, which employs LZMA or LZMA2 compression algorithms. When split, subsequent parts are sequentially numbered (e.g., .7z.001, .7z.002, ..., .7z.039). The software needs to read all sequentially numbered parts to decompress the entire archive.

Did You Know?

The 7-Zip split archive feature allows users to break down archives into parts of a specified size, or into a specific number of parts.
The .7z format itself is known for its high compression ratios, often outperforming other popular formats like ZIP.

Security Information

7-Zip archives can sometimes be used to package malicious software. Always ensure you trust the source of the archive before extracting its contents, and consider scanning extracted files with antivirus software.

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