What is a BLEND1 file & how do I open a BLEND1 file (Blender Document Backup File)?

.BLEND1 (Blender Document Backup File) - File Extension

Developer: Blender

What is a BLEND1 File?

A BLEND1 file is a backup file automatically created by the free 3D modeling software called Blender. These files act as a safety mechanism for your 3D projects.

Picture this: you’re deeply engrossed in sculpting a complex 3D model for hours or even days, and suddenly your computer crashes or the software abruptly closes.

Without a BLEND1 file, you risk losing all your work. However, having this backup file in place allows you to retrieve the previously saved version of your project, ensuring your progress remains intact.

Moreover, it’s worth noting that BLEND1 files can be renamed with the “.blend” extension and opened just like your regular project files. This technical feature provides flexibility and ease of access when needed.

How to Open a BLEND1 File

Opening a BLEND1 file is a straightforward process, but it requires the use of Blender, the software that created it. Here’s a step-by-step guide:

  1. Launch Blender: Start by opening Blender on your computer.
  2. Navigate to “File”: Once Blender is running, navigate to the “File” menu.
  3. Select “Open” or “Recover”: Within the “File” menu, you will find options like “Open” or “Recover.” Choose the appropriate option based on whether you want to open an existing BLEND1 file or recover a previous version of your project.
  4. Locate the BLEND1 File: A file browser window will appear. Use it to locate and select the desired BLEND1 file on your computer.
  5. Open the File: After selecting the BLEND1 file, click “Open” or “Recover,” and Blender will load the backup, allowing you to access the previous version of your project.

Remember that BLEND1 files can only be opened using Blender, as they are specifically designed to work with this software.

How to Convert a BLEND1 File

Converting a BLEND1 file into another format is not a standard practice, as these files are primarily meant for internal use within Blender.

They contain essential data and structures that are specific to Blender’s 3D modeling environment. Attempting to convert a BLEND1 file to another format could lead to data loss or corruption.

Conversely, if you wish to save your Blender project in a different format for compatibility with other software or sharing purposes, you should use Blender’s native export options, such as exporting to formats like “.obj,” “.fbx,” or “.dae.” These formats are more versatile and widely supported across various 3D modeling and rendering applications.

Security Considerations: Are “.BLEND1” Files Safe?

BLEND1 files themselves are not inherently unsafe. They are simply backup copies of your Blender project files, created to protect your work from unexpected data loss.

But, yeah, like any other files on your computer, they can be vulnerable to security risks if your system is compromised.

To ensure the safety of your BLEND1 files and other data:

  • Keep your computer and software up to date with the latest security patches.
  • Use reliable antivirus software to protect against malware and viruses.
  • Practice good data hygiene by regularly backing up your files, including BLEND1 files, to secure external storage devices or cloud services.
  • Be cautious when downloading and opening files from unknown or untrusted sources.

By following these security best practices, you can minimize the risks associated with BLEND1 files and maintain the integrity of your 3D projects.

Format Details for BLEND1 Files

BLEND1 files are binary files that contain a snapshot of the previously saved state of a Blender project. They store various elements, including 3D models, textures, materials, animations, and scene configurations.

These files are specifically tailored to work seamlessly with Blender’s internal data structures and are not meant to be directly edited or manipulated outside of the Blender environment.

The binary nature of BLEND1 files ensures that they retain all the intricate details of your 3D project, preserving the accuracy and fidelity of your work.

But this format’s specificity to Blender means that it cannot be easily opened or understood by other 3D modeling software.

Uses and Applications of BLEND1 Files

BLEND1 files are primarily used for data recovery within the Blender software ecosystem. They serve as a fail-safe mechanism to retrieve previous versions of your 3D projects in case of unexpected software crashes, system failures, or accidental data deletion.

These files provide peace of mind to 3D artists and designers, knowing that their hard work can be restored with minimal effort.

Additionally, BLEND1 files can be useful when collaborating on 3D projects with multiple team members. They allow for the retrieval of earlier project states, enabling team members to review and incorporate changes made at different stages of the project’s development.

Associated Software Programs

As mentioned earlier, BLEND1 files are closely associated with Blender, the popular open-source 3D modeling and animation software.

Blender is available for multiple platforms, including Windows, macOS, and Linux, making it accessible to a wide range of users. It is known for its robust feature set, versatility, and an active user community.

Blender can be downloaded and used for free, making it an attractive choice for both beginners and professionals in the field of 3D modeling and animation. Its ability to create BLEND1 backup files contributes to the software’s reliability and user-friendly experience.

Advantages and Disadvantages of BLEND1 Files


  • Data Recovery: BLEND1 files provide an efficient way to recover your work in case of unexpected issues, ensuring that your progress is not lost.
  • Integration with Blender: These files seamlessly integrate with Blender, making data recovery a straightforward process for users of the software.
  • Version Control: BLEND1 files can serve as a form of version control, allowing you to revisit and compare previous project states.


  • Software Dependency: BLEND1 files can only be opened and utilized with Blender, limiting their compatibility with other 3D modeling software.
  • Lack of Portability: The format of BLEND1 files is highly specific to Blender, making them unsuitable for sharing or collaboration outside of the Blender ecosystem.
  • File Size: As BLEND1 files store a complete snapshot of a project, they can become large in size, consuming valuable storage space.

Comparison to Similar File Extensions

BLEND1 files are unique to Blender and are not directly comparable to other file extensions used in the world of 3D modeling. While formats like “.obj,” “.fbx,” and “.dae” are commonly used for interoperability between different 3D software applications, BLEND1 files serve a specialized purpose within Blender’s environment.

These other formats are typically used for exporting 3D models and scenes to be used in various software packages, whereas BLEND1 files are exclusively designed for internal backup and data recovery within Blender.

Troubleshooting BLEND1 Files

While BLEND1 files are designed to be reliable, users may occasionally encounter issues when working with them.

Here are some common problems and their solutions:

  1. Cannot Open BLEND1 File: If you are unable to open a BLEND1 file in Blender, ensure that you are using the correct version of Blender that matches the file. Older BLEND1 files may not be compatible with newer versions of the software.
  2. Corrupted BLEND1 File: In rare cases, a BLEND1 file may become corrupted due to system errors or software glitches. To address this, try opening the most recent backup file or using Blender’s recovery options to restore the project.
  3. File Size Concerns: If your BLEND1 files are consuming too much storage space, consider periodically deleting older backups or transferring them to external storage.
  4. Data Recovery: In case of accidental deletion or loss of a BLEND1 file, check your computer’s recycle bin or trash folder to see if it can be restored. Additionally, keep regular backups of your BLEND1 files to minimize data loss risks.

History of the BLEND1 File Extension

The BLEND1 file extension is a product of the Blender software’s commitment to user data protection. Blender, initially created by Ton Roosendaal in the early 1990s, has evolved over the years into a powerful and open-source 3D modeling and animation tool.

The inclusion of BLEND1 files as automatic backups was a strategic move to enhance the user experience and ensure the safety of their creative work.

As Blender gained popularity and recognition in the 3D modeling industry, the importance of data security and recovery became more apparent. BLEND1 files were introduced to address this need, providing users with a reliable means of recovering their projects in case of unforeseen events.

Tips and Tricks for BLEND1 Files

To make the most of Blender’s data recovery capabilities, consider the following tips and tricks:

  • Regularly Save Your Project: Save your Blender project regularly to ensure that you have up-to-date backups in case of unexpected issues.
  • Manage Backup Files: Periodically review and clean up your BLEND1 backup files to prevent excessive storage consumption. Keep only the most relevant backups.
  • Use Version Control: Leverage BLEND1 files as a form of version control by creating snapshots of your project at key milestones. This allows you to track changes and easily revert to previous states if needed.
  • Backup to External Storage: For added data security, consider backing up your BLEND1 files to external storage devices or cloud services. This protects your work from hardware failures or disasters.

BLEND1 File Locations

By default, Blender saves BLEND1 backup files in the same directory as the original BLEND file they are associated with.

This means that if you open Blender and create or edit a project named “my_project.blend,” the corresponding backup file, “my_project.blend1,” will be stored in the same folder. This proximity simplifies the process of locating and managing your backup files.

But keep in mind that it’s essential to be aware of the storage location, especially if you intend to move or organize your project files manually. Be cautious not to accidentally delete your BLEND1 backups when cleaning up your project folders.

Customizing Backup Settings

Blender offers users the flexibility to customize the behavior of BLEND1 backups through its settings. By default, Blender creates a BLEND1 file each time you save your project. However, you can adjust this behavior by going to the “Edit” menu, selecting “Preferences,” and navigating to the “Save & Load” section.

Here, you can modify settings related to autosave intervals, the number of backup copies to retain, and where backup files are stored.

Customizing these settings allows you to tailor the backup system to your workflow and storage preferences. For example, you can increase the autosave interval if you find that BLEND1 files are accumulating too quickly or reduce the number of backup copies to save storage space.

BLEND1 File Extension vs. BLEND File Extension

It’s worth noting that the primary Blender project file uses the “.blend” file extension. When you save your work in Blender, you create or overwrite this “.blend” file.

The “.blend” file represents the most recent version of your project, while the BLEND1 files act as historical backups.

In practice, you’ll interact with the “.blend” file more frequently as it reflects your current project state. The BLEND1 files come into play when you need to access previous versions of your project due to unforeseen circumstances.

Collaboration and BLEND1 Files

When collaborating with others on a 3D project using Blender, understanding BLEND1 files becomes crucial.

Sharing your BLEND1 backup files with team members can be helpful, especially when multiple individuals are working on the same project. These files allow team members to synchronize their work, ensuring everyone is on the same page.

It’s also important to establish clear communication and version control practices when sharing BLEND1 files to prevent conflicts or data loss. Coordinating with your team on when and how to use these backup files can streamline the collaborative process.

BLEND1 and Remote Work

In an increasingly remote and distributed work environment, BLEND1 files can be a lifesaver. Remote work setups may involve working with 3D projects from different locations, increasing the chances of data loss due to network interruptions or hardware issues.

Having BLEND1 backups ensures that even in remote work scenarios, your work is safeguarded.

Remember that while BLEND1 files provide valuable protection, they are not a substitute for comprehensive project backup and data management strategies, especially in large-scale and professional 3D production environments.

File Recovery and BLEND1 Files

If you ever encounter a situation where your primary BLEND file is corrupted or lost, BLEND1 files can be a lifeline.

To recover your work, you can follow these steps:

  1. Locate the Most Recent BLEND1 Backup: Identify the most recent BLEND1 backup file associated with your project. This will be the one with the highest number in the filename (e.g., “my_project.blend1”).
  2. Rename the BLEND1 File: Rename the selected BLEND1 file to remove the “.1” extension, effectively turning it into a “.blend” file.
  3. Open Blender: Launch Blender and use the renamed “.blend” file to access your project. This file should contain the most recent saved state before the corruption or loss occurred.


When it comes to 3D modeling and animation, BLEND1 files stand as a testament to the commitment of Blender to its users. These backup files provide a safety net, ensuring that countless hours of creative work are never lost to unexpected software crashes or system failures.

While limited in compatibility with Blender, BLEND1 files serve their purpose admirably, offering peace of mind to 3D artists and designers around the world.

When you understand their function, follow best practices, and implement data security measures, you can harness the full potential of BLEND1 files and confidently explore the boundless possibilities of 3D modeling.

Software Compatible With The BLEND1 File Type
Blender Document Backup File

In this section you will find a list of the best programs compatible with the BLEND1 file type. We've selected the best software for Windows, Mac, Android and Linux to open, edit, convert and view the contents of BLEND1 files.