Opening a 1 File

The 1 file type is primarily associated with StuffIt.

1	File extension: 1
	File type:	archive fragment

What is a 1 file?

1 files mostly belong to StuffIt by Smith Micro. 1 is the filename extension of a log (server logs, utility logs etc.) generated by Multi Theft Auto video game. iOS and SQL Server also save logs in 1 files. Another type of 1 file contains the first fragment of a split archive. Archive management programs can merge a 1 file with other fragments of the archive. Game cartridge cloning applications, for example, split a SNES game ROM into multiple fragments where the first has 1 filename extension, the second; 2 etc. Typesetting systems like groff use a 1 file to save section 1 manual pages on UNIX platforms.
Files with the extension 1 are often also jpg images or pdf documents, but zip compressed archives or medical images such as DICOM are also common. Use the Online 1 File Viewer on this page to find out the file format being used, and to view your 1 file.

How to open a 1 file

You need a suitable software like StuffIt to open a 1 file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your 1 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a 1 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online 1 Text Viewer

Choose your .1 file to analyze

or drag and drop it here

Online File Viewer

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Programs that open and convert 1 files:

StuffIt by Smith Micro
See the previous paragraphs to learn more about the main application. 1 files are often referred to as StuffIt data files because this type of file is primarily created or used by this software.
BGBlitz (position database) by Frank Berger
BGBlitz is an artificial intelligence-based backgammon player software compatible with Windows, Linux, and macOS. Its position database file has 1 filename extension. This file format is classified as Game.
ClickOnce (application manifest) by Microsoft
ClickOnce is a framework for creating and deploying self-updating Windows applications. It saves an application's manifest as an XML document with 1 filename extension. A manifest describes metadata for private and shared files. This file format is classified as Developer. Related links: ClickOnce application manifest, Application Manifests
Creo (first assembly/part version) by PTC
Creo is a computer-aided industrial product design and manufacturing software. Each version of a part or assembly created and saved with Creo is assigned an auto-incremented number as its filename extension. The first version of such a file has 1 filename extension (e.g. tool.part.1). This file format is classified as CAD.
Firefox (data) by Mozilla
Firefox is a cross-platform Internet browser distributed as free software. Older versions of this program use files with 1 filename extension to store cookies, images, and popup permissions. This file format is classified as Data.
FL Studio (audio clip) by Image Line
FL Studio is a cross-platform digital audio workstation used for professional music production. An MP3 file (with ID3 header) encoded using FL Studio's LAME encoder is saved in a file with 1 filename extension. This file format is classified as Audio.
FreeArc (compressed file fragment) by Bulat Ziganshin
FreeArc is an open-source file compression and decompression program for Windows and Linux operating system. It assigns 1 filename extension to the first fragment of an archive that is split into multiple parts. This file format is classified as Compressed.
Gallery (cached image/thumbnail) by Xiaomi
Gallery is the image and video organizer on mobile phones running the MIUI edition of Android. It saves cached images and thumbnails in files with 1 filename extension. This file format is classified as Raster Image. Related links: MIUI
Gatekeeper (quarantined data) by Apple
Gatekeeper is a system protection software for macOS. Its quarantine component renames the filename extension of potentially dangerous files to 1. This file format is classified as Data.
iCalendar (calendar object) by iCalendar Developers
iCalendar (short for Internet Calendaring and Scheduling Core Object Specification) is a cross-platform library and file format for transferring calendar information between systems. It can read a calendar object stored in a file with 1 filename extension. This file format is classified as Data. Related links: iCalendar, iCalendar Validator
Imaging Pro (image) by LEAD
Imaging Pro is a framework for adding image processing technology to various applications. It uses a 1 file to temporarily save an image during conversion and/or compression operations. This file format is classified as Raster Image.
Inno Setup (setup binary) by Jordan Russell and Martijn Laan
Inno Setup is a free and open source software for creating Windows installer packages. Some of its setup binaries are saved in files with 1 filename extension. This file format is classified as Executable.
InstallShield (program setup) by Revenera
InstallShield is a Windows installer package and self-extracting archive development environment. It saves a program setup in a 1 file. This file format is classified as Executable.
iOS (installation/activation log) by Apple
iOS is the operating system of the iPhone. Application installation logs and application activation logs generated by iOS are saved in 1 files. This file format is classified as Data.
iZip (archive fragment) by Codeius
iZip is an archive file management program for macOS. ZIP, 7Z, TAR, and RAR are some of the archive compression formats compatible with this program. iZip can split a large archive saved as a binary property list into smaller fragments where the first fragment has 1 filename extension. This file format is classified as Compressed.
Linux (executable) by Linux Foundaiton
Linux is a free and open source operating system compatible with various platforms. It can run a 1 file containing an executable saved in Executable and Linkable Format. This file format is classified as Executable. Related links: Executable and Linkable Format
man (section 1 manual page) by GNU Project
man (short for Manual Pager) is a command line application for reading manuals created with typesetting systems such as groff. It can read a 1 file (e.g. chmod.1 (chmod.1.gz when compressed)) containing a section 1 (user commands) manual. This file format is classified as Data. Related links: groff, nroff, Writing man Pages Using groff
Maps (direction search database) by Apple
Maps is a GPS navigation software bundled with iOS, iPadOS, macOS, and watchOS. It uses an SQLite 3 database to save the results of the last 3 or 4 direction searches made by a user. This file is named MapSync_0.0.1. This file format is classified as GIS.
Minecraft (log) by Mojang
Minecraft is a sandbox survival and world construction video game for PC, console, and mobile platforms. Logs generated by its servers are saved in files with numbered filename extensions starting from 1. That is, the first log has 1 (.log.1) filename extension, the second has 2 etc. This file format is classified as Game.
Multi Theft Auto (log) by MTA Team
Multi Theft Auto is a modified edition of Grand Theft Auto III video game that adds online multiplayer support. Its server and utility logs are saved in 1 files. This file format is classified as Game.
MultiSIM (data) by National Instruments
MultiSIM is a software suite used for electronic circuit simulation and schematic capture. It uses data saved in a file with 1 filename extension. This file format is classified as Data.
Nox (log) by Big Nox
Nox is a free Android emulation software for PCs. Logs generated by Nox are saved in files with 1 filename extension. This file format is classified as Data.
Omie (day-ahead market prices) by OMI
Omie is a mobile application for managing and visualizing intraday and day-ahead market prices. It can open and visualize day-ahead market prices saved in 1 files downloaded from OMI's website. marginalpdbc_yyyymmdd.1 is the naming convention for such files. This file format is classified as Data. Related links: File Access
Outlook (data) by Microsoft
Outlook is an email and calendar management software available as a web app and a standalone program. It uses some data saved in a 1 file. This file format is classified as Data.
PDF Pro (document) by LEAD
PDF Pro is a software development framework which adds PDF writing, reading, and viewing capabilities to an application. It initially saves a document as a 1 file before exporting it to PDF format. This file format is classified as Data.
Photoshop (project) by Adobe
Photoshop is a professional photo editor and raster graphics design program for desktop and mobile platforms. It can open a project saved in a file with 1 (instead of PSD) filename extension. This file format is classified as Raster Image.
QB64 (script) by Rob Galleon & QB64 Team
QB64 is a cross-platform compiler for applications written in BASIC programming language. It can run a script saved in a 1 file. This file format is classified as Developer.
Screen (log) by Free Software Foundation
Screen is a full-screen multiplexer-capable window manager for UNIX-based systems. The filename extension of a new log generated by Screen is incremented by 1 (with the previously created log as the basis for such computation). That is, the first log has 1 filename extension, the second 2 and so on. This file format is classified as Data.
Snes9x (game disk image fragment) by Snes9x Team
Snes9x is a desktop application that emulates SNES console. It can load and run a video game saved as a split disk image. The first fragment of the split image is saved in a 1 file. All fragments of the image must be loaded into Snes9x to play the game This file format is classified as Game. Related links: Super Nintendo Entertainment System, Emulator Zone, Emulation Newbies Start Here!
split (compressed file fragment) by Free Software Foundation
split is a command line program that splits large files into smaller fragments. The first fragment of a file split with this program has 1 filename extension, the second; 2 and so on. This file format is classified as Compressed.
SQL Server (error log) by Microsoft
SQL Server is a commercial relational database management system for Windows. Every time the server is started, its current error log is renamed to errorlog.1 while the file that previously had that name is renamed to errorlog.2 and so on. This file format is classified as Data. Related links: sp_cycle_errorlog (Transact-SQL)
Sublime (data) by Sublime
Sublime is a cross-platform code editor for desktop environments. It can open and edit a 1 file containing JSON-encoded data. This file format is classified as Data.
Sublime (web page) by Sublime
Sublime is a lightweight code editor compatible with Windows, macOS, and Linux. It can edit a 1 file containing HTML markup. This file format is classified as Web (source).
The File Splitter (file fragment) by Dekabyte
The File Splitter is a discontinued program that splits a large file into smaller parts that can be saved on floppy discs. The first fragment of such a split archive has 1 filename extension. The filename extension of each fragment after that is incremented by 1. This file format is classified as Data.
VirtualBox (log) by Oracle
VirtualBox is a system virtualization software which allows users to run multiple guest operating systems on top of a single host operating system. Its logs have 1 (.log.1) filename extension. This file format is classified as Data.
VLC (video/audio clip) by VideoLAN
VLC is as a cross-platform multimedia player for mobile and desktop platforms. It can play RIFF and Matroska video and audio clips saved in files with 1 filename extension. This file format is classified as Video. Related links: RIFF
WebOutfitter (data) by Intel
WebOutfitter is an obsolete digital image acquisition software package for Pentium® III-based computers. It saves data in a file with 1 filename extension. This file format is classified as Data.
Windows (executable) by Microsoft
Windows is a cross-platform operating system. Its desktop and server editions can run a 1 file containing an executable (EXE). This file format is classified as Executable.
WinRAR (archive fragment) by RARLAB
WinRAR is a cross-platform archive compression and encryption software. It assigns 1 filename extension to the first fragment of a split archive. This file format is classified as Compressed.
WinZip (split archive) by Corel
WinZip is an archive management and file compression program for Windows desktop. It can create and merge a split archive for which the first fragment is saved as a 1 file. This file format is classified as Compressed.

1 file format details:

If you can determine the file format, the associated program can also be determined. Each file format has a unique extension and almost always a unique signature. For example, Microsoft Word documents have the extension .docx and the signature (usually the first 3 characters in this file) PK. However, different programs can use the same file extension. Furthermore, a file extension can be renamed incorrectly and double-clicking on it will then display an error when it is opened. So a detailed analysis of a file is vital in order to determine the format and the associated program. In the following you will find our evaluation of the 1 files:

1 is a very commonly used file extension and includes many different file formats. The two most popular formats are as follows:

8% of all 1 files use the same file format, which have the signature #UGC:2 . The contents of these files cannot be read by a human; only a computer program can interpret the data. The file size is in the range of 45 KB to 3 MB. The file type was created 10 years ago, but is still used today. The following keywords are characteristic: - VERS 0 0 , - HOST and #UGC:2 PART. Files like these have the following tags: cover, assy, housing, assembly, insert, motor, base and left.
8% of all 1 files use the ZIP format, the 1 file contains a number of compressed files. A 1 file contains 4 to 210 files, the average being 192. File names inside are always resources.arsc and \res\. If you want to see the included files and images, simply rename the file extension to .zip and double-click it. A typical file size is 8 MB. Examples of file names are base.apk.1. Files like these have the following tags: itis, wksp, curriculum, original, training, android, release and days.

The remaining 84% of all 1 files are files with no common format, the following 50 formats exist: PDF, JPG, PNG, GZIP, XML, SQL, ELF, WordPerfect, RAR, PSD, JSON, DOC, BEGIN, NCBI, VirtualBox, NFSS, Received, MARGINALPDBC, ISA and Mon. They are often associated with blob, photo, template, thumbnail, micro or mobile. If you want to find out which format your 1 file belongs to, just click on the button "Choose your .1 file to analyze".

Technical Data for 1 File Extension

File classification:

Data

Related files:

1-1, pad, 2, 3, blob, check, prt, 4, fp10, 5, file, phd, drw, idx, 6, wksp, fp, f10, exe, ptt, sit, sea, sitx

Mime type:

text/troff, application/octet-stream, application/x-troff-man

a 1 archive fragment is a special file format by Smith Micro and should only be edited and saved with the appropriate software.

How to solve problems with 1 files

Associate the 1 file extension with the correct application.
Update your software that should actually open archive fragments. Because only the current version supports the latest 1 file format. Search, therefore, e.g. on the Smith Micro manufacturer website after an available StuffIt update.
To make sure that your 1 file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .1 file online - secure, fast, and no downloads needed.