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ConvertBox

PDF to Long Image

Stitch every PDF page into one tall scrollable image (JPG or PNG). Pick the output width and DPI, processed entirely in your browser — no upload.

1. Select PDF

📄

Select PDF File

Connects all pages vertically

Max file size: 50MB

or drag and drop · press Enter to browse

How to Use

  1. Select the PDF file to convert
  2. Choose image quality (higher means larger file size)
  3. Click "Convert to Long Image" button
  4. Automatic download once conversion is complete
  5. Verify the output file in your device's download folder.
  6. You can adjust settings and process new files immediately without any restrictions.

All processing is done in your browser, and files are never sent to a server.

Frequently Asked Questions

A long image combines all PDF pages vertically into a single continuous image, making it easy to scroll through on mobile devices.
Choose PNG for lossless quality (larger file) or JPEG for a smaller file with adjustable compression.
Yes, but PDFs with many pages will produce a very tall image and may take longer to process.
No. All operations are processed entirely inside your browser's local sandbox using client-side APIs (like WebAssembly, pdf-lib, or HTML5 Canvas). Your files and data never leave your device.
The tool is completely free with no usage limits. However, since processing occurs in your browser's memory, we recommend keeping file sizes under 50MB (especially for heavy files like PDFs or videos) to ensure stability.
No. All tools on ConvertBox are 100% free. We do not insert watermarks, limit features, or require any registration or payment.
Yes. Once the page and its local library dependencies are loaded in your browser, the conversion logic runs completely offline without needing an active internet connection.

Note: PDFs with many pages might take longer to convert.

Preview: Useful for webtoons, comics, or long documents for easier scrolling.

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