ReorderFlow is a lightweight Windows app that allows you to quickly reorder and renumber large groups of files.
I originally created this app for 3D animation workflows. Animation frame sequences often consist of hundreds or even thousands of numbered image files. The numbering of those files determines the playback order of the animation. When frames are removed, shortened, merged with other sequences, or need to start from a different frame number, the entire sequence often has to be renumbered manually — a very tedious and error-prone task.
ReorderFlow automates this process and lets you create a renumbered copy of an entire sequence with just a few clicks.
Getting Started
ReorderFlow is available from the Microsoft Store . Simply install the application, and it will automatically receive future updates through the Microsoft Store. No additional configuration is required.
How it works
Open the app and select the folder that contains the files you want to process. ReorderFlow scans the folder and automatically detects file groups based on matching file extensions and numbered filenames. Each detected sequence is listed as a separate group.
For example:
Frog_Run_0001.png
Frog_Walk_0002.png
Frog_Stand_0003.png
Frog_Sit_0001.mp4
Frog_Lie_0002.mp4
Frog_Jump_0003.mp4
ReorderFlow will detect these as two separate groups:
PNG files — 3 numbered files — numbers 1–3
MP4 files — 3 numbered files — numbers 1–3
You can then choose exactly which file group you want to reorder or renumber using the Detected Groups dropdown menu.
Reorder and renumber
The app supports two main workflows:
Renumber all files
Use this option when files are missing from the sequence, leaving gaps in the numbering. ReorderFlow will create a new continuous numbering order without gaps.
Reorder and renumber files
Use this option when you want a different file to become the new starting point of the sequence.
For example, if you want file 0050 to become the new first file, you can set that file as the starting point and choose which number the new sequence should begin with, such as 0, 1, or any custom value.
This is especially useful when combining multiple sequences together. If one sequence ends on number 0034, the next sequence can automatically start at 0035.
You can also choose the numbering format, which determines the minimum number of digits used for each file number.
0001
0002
0003
Specify the numbering format in the Numbering format dropdown menu.
File naming
ReorderFlow offers two ways to name the generated files:
- Keep the original filename and only replace the numbers.
- Use a custom prefix for all generated files.
Output folder
By default, the app creates the reordered copy next to the original source folder. You can also choose a completely different output location.
The output folder name is automatically generated based on the original folder name with _Copy added to it, but this can be changed freely. Just enter the folder name you want in the Output folder name input field.
Preview system
Before creating the renumbered copy, ReorderFlow generates a preview of the resulting filenames.
Inside the main interface, the first three and last three generated files are shown for quick inspection. You can also open the full preview window to inspect the complete sequence before processing by pressing the Open full preview button.
Creating the reordered copy
Once all settings are configured, click Create reordered copy.
ReorderFlow will then create a renumbered copy of the selected file sequence inside the chosen output folder while leaving the original files untouched.
Privacy & Security
ReorderFlow processes files entirely on your own computer.
The application reads the filenames in the selected folder to determine the numbering order and creates a renumbered copy in the chosen output folder. Your original files are never modified or deleted.
ReorderFlow does not upload, transmit, or share your files or filenames. All processing is performed locally on your computer.
For more information, see the Privacy Policy.
Learn More
ReorderFlow is an open-source project. While the Microsoft Store is the recommended way to install the application, the complete source code is available on GitHub.
GitHub is also the central place to report bugs, request new features, ask questions, get support, explore the source code, and contribute to the project.