Learn how to rename all file extensions in a folder & sub-folders at once on Windows 11/10. You can batch rename or rename all file extensions in bulk using this guide.

We show you how to open files with no extension in Windows 11/10. You can try these tricks or use one of these free software or online tools.

If you haven’t started your taxes, it’s not too late. Read our guide on the best and quickest ways to file and how you can ask for an extension.

Extension needed You can e-file an extension for free using any of the Free File software offered by the major tax preparation companies.