$pdf->setJPEGQuality(90);
$pdf->setJPEGQuality(50);This line of code sets the JPEG image quality to 50%. This will result in more compression and a smaller file size, but the image quality may be noticeably lower. Package Library: TCPDF. In summary, setJPEGQuality is a useful function in TCPDF that allows developers to adjust the quality of JPEG images in a PDF document. By using this function, users can balance file size and image quality to create high-quality PDFs with a smaller file size.