PART File Extension
Partially Downloaded Format
- File Type part
- Popularity
- Application Firefox
- Category Temporary Files, Web Files
- Format Text and Binary
What is a PART file?
Partially Downloaded Format works with the PART file extension and is classified under Temporary Files and Web Files, with a total of 524 files.
PART file support extends to various operating systems, including Windows, Linux and Mac OS. You can create a PART file using one of 8 programs, for example Firefox, FlashGet and Skype.
Programs that support PART files
How to open a PART file?
The most common reason why a PART file cannot be opened is the absence of required software. To fix this, select a compatible program from the list. Then visit the official developer website via the provided link, download the program, and install it on your system.
Thanks to their popularity, Firefox, FlashGet and Skype are often the go-to programs for managing PART files. To install the updated version of Firefox, simply go to the Mozilla site and download the installer compatible with all major platforms.
After setup, the operating system should recognize PART files and link them with Firefox.
Set Firefox to open PART by default
Change default apps on Mac
- Right-click or use Control + Left-click on the desired PART file to access the file’s context menu;
- Choose "Open in Application" and click "Other";
- Scroll down to the bottom of the window, and there you will find the "Enable" menu. The default selection is "Recommended Programs";
- Choose "All Programs" within this menu and locate Firefox. Check the box next to "Always open in app" to set it as the default program.
Change a default app in Windows
- Start the process by right-clicking on your PART file and selecting "Open With". From there, click "Choose another app" to continue;
- Find the Firefox application in the pop-up window and select it as your preferred program;
- Select the "Always use this application" check box and click "OK" to save your selection as the default application for opening PART files.
Easy PART Troubleshooting
PART files can sometimes be tricky, but minor software adjustments usually resolve the issues. Refer to the tips below for guidance.
Why does Firefox stop responding or crash intermittently?
Lack of regular software updates can cause Firefox to crash. Make sure you have installed the latest updates for Mozilla products.
Restarting your computer is often an effective solution to resolve various common problems. Therefore, it is recommended to do so before making any changes to the software configuration.
What are the best practices for repairing a PART file that has gone bad?
Start a recovery program, open the damaged PART file and then select the "Repair" menu item to start the repair procedure. Please wait patiently for the recovery process to finish as it will automatically repair the damaged temporary files.
How can I confirm if my PART file has been damaged?
Characteristics of corrupted PART temporary files can include:
- Editing the archive in Firefox is hampered by poor overall performance;
- Trying to work with the archive in Firefox or other programs causes instability or program crashes;
- The file does not open correctly or displays error messages;
- An unexplained increase in the size of the PART file;
- The file operation is accompanied by the display of error messages;
How to edit a PART file?
To modify PART files, you need to install special software that makes it possible to open and edit temporary files. Online PART editors are more restricted compared to software designed for Partially Downloaded Format.
Best PART editors 2026
Based on your described criteria, here is a list of available PART editors.
| PART Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| FlashGet | Trend MediaLimited | Windows | 4.7 out of 5 (40 reviews) |
| Skype | Skype | Windows, Mac OS, Linux, Apple iOS, Android, Windows Phone | 4.7 out of 5 (43 reviews) |
| JDownloader | Jdownloader Team | Windows, Mac OS, Linux | 4.5 out of 5 (42 reviews) |
| aMule | aMule Project | Mac OS | 4.4 out of 5 (39 reviews) |
| eMule Plus | SourceForge | Windows | 4.4 out of 5 (46 reviews) |
| Free Download Manager | FDM | Windows | 4.3 out of 5 (40 reviews) |
| Firefox | Mozilla | Windows, Mac OS, Linux | 4.2 out of 5 (45 reviews) |
| Go!Zilla | Headlight | Windows | 4.2 out of 5 (39 reviews) |
Convert files to and from PART
If obstacles arise while working with a PART file, you may convert it to formats like JPG, PNG, TIF, STEP or other similar types for smoother handling.
After converting a PART file, some capabilities may be limited, but you can often convert it back to the original format.