Preview safe file-extension changes before renaming files.
Datei Erweiterung Changer is a free online dateien tool that works right in your browser — whatever you enter is processed locally and never sent to a server. No installation, no signup; works on both phone and desktop, ready to use instantly.
We noticed most online tools upload your files to remote servers. Since privacy is our core principle, we built this tool to process everything locally in your browser.
Ja, völlig kostenlos und ohne Anmeldung.
Ja, es funktioniert auf mobilen Browsern mit Touch-Unterstützung.
Dateien
Yes. Datei Erweiterung Changer is a pure front-end tool: whatever you type or paste is processed only in your browser's memory and never sent to a server. It disappears as soon as you refresh or close the page.
🔒 Privacy & Security：All processing happens locally in your browser. Files are never uploaded or stored.
🔒 Privacy: All processing happens locally in your browser. Your files and data never leave your device — no upload, no server, no tracking.