1. Pick an output
Search hundreds of targets. Filter by name or browse by category.
extention-changer.com
Free online file extension changer. Rename or convert any file across images, documents, audio, video, code, archives and 1000+ formats — privately in your browser, with instant download.
Drop any files here
or click to browse · all file types accepted
File formats you can change
Choose an output extension from a deep catalog spanning creative, office, developer and system file types. Image and text pairs can be translated in-browser; everything else is renamed safely.
1000+
unique extensions
20+
format categories
0
files uploaded to a server
How to change a file extension
Three steps. No account. No queue.
2. Drop files
Drag and drop or browse. Any extension is welcome — from .png to .blend to .sql.
3. Instant download
No queue. Files convert or rename immediately and download as your chosen extension.
Frequently asked questions
Does changing a file extension convert the file?
For many images and text formats, Extention Changer re-encodes or translates content in your browser. For all other types, it renames the extension while keeping the original bytes so you can fix incorrect extensions or prepare files for specific software.
Are my files uploaded to a server?
No. Processing happens entirely in your browser. Your files never leave your device.
How many file formats are supported?
Extention Changer supports over 1000 unique extensions across images, documents, audio, video, archives, code, data, fonts, CAD, games and more. You can output to any listed format.
Will renaming break my file?
Renaming only changes the suffix; the bytes stay the same. Opening the file still depends on the real format and the software you use.
Is Extention Changer free?
Yes. The tool on extention-changer.com is free to use with no signup.