ASM File Extension
Assembler Source Code Format
- File Type asm
- Popularity
- Application RAD Studio
- Category Developer Files
- Format Text
What is a ASM file?
Assembler Source Code Format, identified by the ASM extension, is a Developer Files type and includes 1166 files.
ASM file support extends to various operating systems, including Windows, Linux and Mac OS. When working with ASM files, you can rely on 9 programs, including Microsoft Visual Studio, RAD Studio and GNU Emacs.
MIME types
- text/plain
- text/x-asm
Programs that support ASM files
How to open a ASM file?
If you can’t open a ASM file, it is usually because the necessary software is missing. To resolve the issue, select the right program from the list for your operating system. Then go to the official website of the developer, download the software, and install it.
When it comes to opening and working with ASM files, Microsoft Visual Studio, RAD Studio and GNU Emacs are the top choices for users. To install the updated version of RAD Studio, simply go to the Embarcadero site and download the installer compatible with all major platforms.
Once the process is complete, RAD Studio should take over as the default application for ASM files.
Set RAD Studio as the default ASM program
Changing Default Programs in Windows
- Right-click on your ASM file, then choose the "Open with" option and select "Choose another application" from the available options;
- In the pop-up window, select the RAD Studio application;
- Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening ASM files.
Change Default Program on Mac
- Right click or Control + left click on the desired ASM file;
- Select "Open in application" and click "Other";
- At the bottom of the window, you will find the "Enable" menu. Default, will be set to "Recommended Programs";
- Choose "All Programs" in this menu and search for RAD Studio. Check the box next to "Always open in app" to make it the default program.
Solve problems with ASM files
Rest assured, any issues with ASM files can typically be addressed with simple software adjustments. See the tips below for help.
Why does RAD Studio stop responding or crash intermittently?
RAD Studio crashes can be caused by outdated software. Keep your Embarcadero products up to date by installing the latest updates.
Restarting your computer will solve many common problems, which is why it’s the first thing you should do before changing any settings related to the software.
What are the best practices for repairing a ASM file that has gone bad?
Use a data recovery program to open the damaged ASM file and from the menu choose "Repair" function to start the repair process. Allow the recovery process to complete, which will automatically repair the damaged developer files.
What are the warning signs that my ASM file may be corrupted?
Common indications of damaged ASM developer files are:
- Error messages appear during the course of working with the file;
- Editing the archive in RAD Studio results in slow or unresponsive behavior;
- Opening the file results in an error or a failed attempt;
- Unexpected expansion of the total size of the ASM file;
- Opening the file in RAD Studio or other programs causes them to hang or crash;
How to edit a ASM file?
To edit ASM files, it is essential to install software that supports not only viewing but also editing the developer files. Online ASM editors provide limited functionality compared to full-featured software for Assembler Source Code Format.
List of Top ASM editors 2026
Based on the criteria above, here is a selection of ASM editors you can use.
| ASM Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| TextEdit | Apple | Mac OS | 4.9 out of 5 (44 reviews) |
| Notepad++ | Notepad++ Team | Windows | 4.8 out of 5 (43 reviews) |
| Microsoft Visual Studio | Microsoft | Windows, Mac OS, Linux | 4.7 out of 5 (40 reviews) |
| Atom | - | Windows, Mac OS, Linux | 4.5 out of 5 (41 review) |
| RAD Studio | Embarcadero | Windows | 4.5 out of 5 (46 reviews) |
| Sublime Text | Sublime HQ Pty | Windows, Mac OS, Linux | 4.4 out of 5 (46 reviews) |
| Gedit | GNOME | Linux | 4.2 out of 5 (42 reviews) |
| GNU Emacs | FSF | Linux | 4.2 out of 5 (39 reviews) |
| Windows Notepad | Microsoft | Windows | 4.1 out of 5 (43 reviews) |
Convert to and from ASM
If obstacles arise while working with a ASM file, you may convert it to formats like DWG, IGS, IGES, STEP, PDF or other similar types for smoother handling.
Keep in mind that converting a ASM file may introduce some limitations, but the original format can often be restored.