Scan & Merge Images to PDF (Images to PDF)
Combine multiple images or camera captures into a single PDF file: document scan filters, drag-and-drop reordering, A4/Letter paper size, and file compression.
Merge multiple JPG or PNG images into a single PDF right in your browser — drag and drop to reorder pages, choose A4/Letter paper size, compress to reduce file size, and even use document-scan mode (auto edge detection and perspective correction to make pages as straight as a scanner). No software to install, no watermark, and no usage limit.
📖 See the detailed guide: How to Convert Photos to PDF on Your Phone (iPhone & Android) for FreeHow to use Merge Images to PDF
- Click "Choose images" to upload, or drag and drop multiple images into the frame at once; you can also tap the camera icon to shoot directly.
- Drag and drop the images to arrange them in the right page order for the PDF; remove any you don't want with the 🗑 button.
- Choose the paper size (A4, Letter, or fit-to-image) and a compression level to balance sharpness against file size.
- For photos of documents, tap the ✂️ button to crop the edges and correct the perspective; the tool auto-detects the four corners, and you only need to adjust them if necessary.
- Click "Create PDF" and download the file to your device.
Why convert images to PDF?
A PDF file keeps the layout consistent, prints uniformly, and is much easier to email or submit than a batch of separate images. Combining photos of your ID card, invoices, homework, or contracts into a single PDF lets the recipient open everything in one go, in exactly the order you intended.
How does document-scan mode work?
When you tap ✂️, the tool uses a computer-vision library (OpenCV running right in the browser) to detect the paper's four corners, then corrects the perspective (deskew) so the page becomes flat and square like a scanned document — even if your shot was a bit tilted. You can drag the four corners to fine-tune them before applying.
Tips for a clean, lightweight PDF
Shoot with good lighting and place the document on a contrasting background (white paper on a dark table) for more accurate edge detection. If you only need it for reading or archiving, turn on compression to keep the file small for emailing; if you need high-quality printing, lower the compression level.
Frequently asked questions
Is converting images to PDF free?
It's completely free, with no usage limit and no watermark added to the PDF.
Are my images uploaded to a server?
No. PDF creation runs entirely in your browser — all processing happens right on your device, so your data is never sent to any server.
Is there a limit on the number of images per PDF?
There's no hard limit; it depends on your device's memory. With many large images, it's best to turn on compression to keep the PDF file smaller.
Does scan mode make pages as straight as a real scanner?
Yes. The tool detects the four corners and corrects the perspective, so even a page shot at an angle gets flattened out, giving a result close to an actual scan.
How do I reorder the pages?
Just drag and drop the images in the list before creating the PDF; the order shown is exactly the page order in the file.