1. Drop a file
Drag and drop or browse. Nothing is converted until you pick a format.
extension-converter.com Free online file converter
Convert PNG, JPG, WebP, PDF, CSV, JSON, and more privately in your browser. Only real conversions are offered, with no signup.
Drop any files here
or click to browse · all file types accepted
File format catalog
The catalog lists the extensions people search for. After you drop a file, the tool offers only the conversions it can actually encode.
1000+
unique extensions
20+
format categories
0
files uploaded to a server
How to convert a file online
Three steps. No account. No queue.
2. Pick a conversion
Only formats that can actually be encoded from that file are listed.
3. Convert
The download is the new format. The original file is never only renamed.
Frequently asked questions
Does changing a file extension convert the file?
Yes. Extension Converter re-encodes the file in your browser. Images, documents, spreadsheets, subtitles, audio, and archives are written in the real target format. If a pair cannot be encoded, the file is skipped instead of renamed.
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?
The catalog lists over 1000 extensions. Conversion runs when the browser can encode that format, including common images, documents, spreadsheets, subtitles, ZIP and gzip archives, and audio saved as WAV.
What happens if a format cannot be converted?
The file is skipped and the page explains why. Extension Converter does not rename the extension while leaving the original bytes unchanged.
Is Extension Converter free?
Yes. The tool on extension-converter.com is free to use with no signup.