1. Load patched jsPDF

Copy source from custom laucheukhim jsPDF repository and just paste it to the Dev Console.

2. Run command

const { jsPDF } = window.jspdf;

3. Paste function

Inspired by tuhinpal drive-protected-pdf-downloader.js:

function generatePDF() {
    console.log("Processing... Please wait while the PDF is being generated.");

    const pdf = new jsPDF();
    const images = document.querySelectorAll('img[src^="blob:"]');
    const canvas = document.createElement('canvas');
    const context = canvas.getContext('2d');
    let isFirstPage = true;
    const imageStats = [];

    for (const img of images) {
        // Set canvas dimensions to the image dimensions
        canvas.width = img.width;
        canvas.height = img.height;
        context.drawImage(img, 0, 0, img.width, img.height);

        // Convert the canvas to image data
        const imgData = canvas.toDataURL('image/jpeg', 1.0);
        if (!isFirstPage) {
            pdf.addPage();
        }
        isFirstPage = false;

        // Add image data to the current PDF page
        pdf.addImage(imgData, 'JPEG', 0, 0,
                     pdf.internal.pageSize.getWidth(),
                     pdf.internal.pageSize.getHeight());

        // Collect image stats for console output
        imageStats.push({
            Index: imageStats.length + 1,
            Width: img.width,
            Height: img.height,
            'Source URL': img.src
        });
    }

    // Log stats using console.table
    console.table(imageStats);

    // Print summary statistics
    console.log(`Total Images Processed: ${imageStats.length}`);
    console.log(`Total Pages in the PDF: ${imageStats.length}`);

    // Save the final PDF
    pdf.save(`${document.title.replace(' - Google Drive', '')}.pdf`);
    console.log("PDF generation completed successfully.");
}

4. Open GDrive PDF

Zoom it to e.g. fit the window. The more You increase zoom – the more details (and size) final PDF will have.

5. Run function

generatePDF()

6. Wait... for the download prompt

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