1 Converter

Convert 1 files online for free


Drop or upload your .1 file
✈

How to convert your 1 file

  1. Click the "Select File" button above, and choose your 1 file.
  2. You'll see a preview.
  3. Click the "Convert file to..." button to save your file in the format you want.

Convert 1 to another file type

The converter easily converts your 1 file to various formats - free and online. No Notepad or extra software needed.

  • 1 to SYS
  • 1 to DLL
  • 1 to EXE
  • 1 to DRV
  • 1 to VXD
  • 1 to 386
  • 1 to COM
  • 1 to BAT
  • 1 to CMD
  • 1 to SCR
  • 1 to PIF
  • 1 to LNK

Convert a file to 1

The converter also works in reverse, so you can convert other Cad formats to 1 with high quality output.

  • MSI to 1
  • EXE to 1
  • REG to 1
  • MST to 1
  • LNK to 1
  • CAB to 1
  • CAT to 1
  • DRV to 1
  • INF to 1
  • SYS to 1
  • MSU to 1
  • DLL to 1

About 1 files

The .1 extension is a polyglot filename often causing confusion due to its multiple distinct uses. Primarily, it serves as a CAD data file for Siemens NX (formerly Unigraphics), storing 2D drawings or 3D part information. In the Unix/Linux world, it represents a Section 1 Manual Page (documentation for user commands) formatted with Troff/Groff markup. Additionally, it is frequently a generic artifact - either a split archive volume (e.g., part of a WinRAR sequence), a rotated log file (e.g., error.log.1), or simply a backup created by appending a version number to a standard file like a JPG or PDF.

Opening these files is problematic because Windows and macOS rarely associate the .1 extension with a specific application. Siemens NX files are proprietary and require expensive licensing to view. Unix Manual Pages appear as garbled text in standard editors like Notepad due to formatting codes. Split archives cannot be opened individually; they require all parts to be present. For generic backups, users often don't know the original format.

To solve this, convert.guru identifies the file's internal signature (magic number) to determine the correct processing path. For CAD data, convert to STEP or PDF for easy sharing. For Manual Pages, convert Troff source to HTML or PDF for readable documentation. For split archives or backups, we help you identify the true format (like ZIP or JPEG) so you can restore or extract the content seamlessly.

Use Convert.Guru to open and convert your 1 file.

Users also converted PRT, 2, DRW, 3, FP10, BIN, 4, FP, APK, ASM, 5, DAT and CMP files.



The 1 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 1 converter.