To convert your PDF files to other formats using the Online PDF converter feature, simply follow these steps: 1. Go to the pdfFiller website and log in to your account. 2. Click on the 'PDF Converter' tab in the top menu. 3. Upload the PDF file you want to convert by clicking on the 'Choose File' button. 4. Select the desired output format from the drop-down menu. 5. Click on the 'Convert' button to start the conversion process. 6. Once the conversion is complete, you can download the converted file to your computer.