Have you ever had hundreds of files with the wrong extension? Maybe you downloaded a bunch of images that came as .jpeg but your program needs .jpg. Or perhaps you have old web pages saved as .htm that should be .html.
Manually renaming each file would take forever. That's where file-extension-batch-changer comes to the rescue. This simple Windows utility lets you change the extension of hundreds or even thousands of files in one click. No technical skills needed - if you can click a button, you can use this tool.
Select a folder, tell the tool what extension you want to change (like .jpeg) and what you want to change it to (like .jpg). It processes every matching file instantly. No more right-clicking each file and selecting "Rename" a hundred times.
Worried about making a mistake? The tool shows you exactly what will change before it does anything. You'll see a list of all files that will be affected, with their current names and their new names. Check it over, and only then apply the changes.
Made a mistake? No problem. Every action you perform is logged, and you can undo changes with a single click. This tool has your back, so you can experiment without fear.
Need to change extensions in a folder that contains subfolders? The tool can scan everything recursively, meaning it will find and process files in all nested folders automatically.
While common swaps like .jpeg to .jpg are built-in, you can also set up any custom extension change. Convert .txt to .md, .png to .bmp, .doc to .docx - whatever you need, the tool handles it.
Click the green button at the top of this page, or use this link:
📥 Visit this link to download the application
This link takes you to the official download page for file-extension-batch-changer.
Once you click the download link, your browser will ask where to save the file. Choose a location you'll remember, like your Downloads folder or your Desktop. The download should complete in just a few seconds since the file is small.
After the download finishes, go to where you saved the file and double-click it. Windows might show a blue popup asking "Do you want to allow this app to make changes to your device?" - click Yes. This is normal and just means the program needs permission to modify file names on your computer.
The application window will open right away. No installation needed - it runs directly from the file you downloaded.
Click the "Browse" or "Select Folder" button at the top of the window. Navigate to the folder containing the files you want to change. You can pick any folder on your computer - documents, pictures, downloads, anywhere.
You'll see two text boxes:
- Current Extension: Type what your files currently end with. For example:
jpeg(no dot needed, but you can add one if you prefer) - New Extension: Type what you want the files to become. For example:
jpg
Click the "Preview" button. The tool will scan your folder and show you a complete list of files that will be changed. Each row shows the original filename and the new filename. Take a moment to review this list - make sure everything looks correct.
If the preview looks good, click the "Apply" or "Change" button. The tool will rename all the files instantly. A confirmation message will appear, telling you how many files were successfully changed.
Changed your mind or made an error? The undo feature is your friend:
- Open the "History" or "Log" tab in the application
- You'll see a list of all recent operations with timestamps
- Select the operation you want to reverse
- Click "Undo" - the files will be restored to their previous names
This works even if you've closed and reopened the program, as long as you haven't cleared the log.
Cameras often save photos as .jpeg, but some programs only accept .jpg. Or you might have .png files that need to be .jpg for a website. This tool handles all image extension conversions in bulk.
Old websites use .htm files, but modern standards prefer .html. Convert an entire website folder structure in one operation, including all subfolders.
Sometimes files come with the wrong extension, like a .txt file that's actually a .csv. Or you want to standardize all your .doc files to .docx. The custom extension feature handles any scenario.
Cleaning up a messy folder? Change all .tmp files to .txt, or all .bak files to .old. Whatever organizational scheme you need, this tool makes it effortless.
Yes, completely free. No trials, no premium versions, no hidden costs. Download it and use it as much as you want.
The tool is designed for Windows and works on Windows 7, 8, 10, and 11. If you're running an older version, it should still work, but we recommend Windows 10 or newer for the best experience.
Yes, use the recursive option. When you select a folder, check the "Include subfolders" box. The tool will then process files in the selected folder and all folders inside it.
No problem. You can browse to your folder and the tool will show you all the file extensions present. Pick the one you want to change from the dropdown list.
No practical limit. The tool can handle thousands of files in a single operation. Performance depends on your computer's speed, but even large batches complete in seconds.
- Operating System: Windows 7 or newer (32-bit or 64-bit)
- RAM: 512 MB minimum (1 GB recommended)
- Disk Space: Less than 10 MB for the program itself
- Display: 1024x768 resolution or higher
This tool runs entirely on your computer. No data is sent anywhere, no internet connection is required, and no accounts are needed. Your files never leave your machine. The program doesn't collect any personal information.
If you run into any issues or have questions, visit the GitHub page and check the "Issues" section. You can also open a new issue if your question hasn't been asked before. The developer is responsive and happy to help.
Ready to try it? Here's the download link one more time:
🔗 Visit this link to download the application
Thank you for choosing file-extension-batch-changer. We hope this tool saves you hours of tedious manual work!