Image to PDF Converter

Step by step with the Image to PDF Converter

1. Add the images, in any order.
2. Put them in page order: drag them, or use the up and down arrows beside each one.
3. Choose the page size, orientation and margin, and whether each image fits inside the page or fills it.
4. Choose the print resolution and JPEG quality; 200 DPI at 85 % suits most documents.
5. Enter a file name and select Create PDF. The PDF downloads as soon as it is ready.

A real example

Three phone photos of a signed form, A4, portrait, 10 mm margin, 200 DPI, 85 % quality:

• Each 3024 × 4032 photo is placed 190 mm wide by 253 mm tall, centred on its page.
• At 200 DPI that needs about 1497 × 1996 pixels, so each photo is resampled to that size before it is stored.
• The result is a three-page signed-form.pdf, a fraction of the size of the original photos, that prints at the right scale.

What happens to your image

Each image becomes one page, in the order of the list. The page size comes from the setting (with the orientation following the image when it is set to Auto), the margin is taken off every side, and the image is then fitted inside what is left, or scaled to fill it with the edges trimmed.

Before it goes into the PDF, each image is resampled to the print resolution you choose, at the size it will appear on the page. A 4032-pixel-wide photo placed 190 mm wide on A4 needs only about 1500 pixels at 200 DPI, so the rest of its pixels would add to the file size without adding any visible detail on paper. Images already smaller than that are never enlarged.

The PDF is written by the page itself: each resampled image is encoded once as JPEG and stored in the PDF unchanged, because PDF can hold JPEG data as it is. There is no second round of compression, and no server builds the file.

When the Image to PDF Converter helps

• Turning photographed pages of a document into one PDF to email or upload.
• Submitting several certificates or ID scans as a single file.
• Collecting screenshots into a PDF for a bug report or a handover.
• Printing a set of photos one per page.

If the result is not what you expected

The PDF is larger than expected

Each page stores its image as JPEG at the chosen resolution and quality. Choose 150 or 200 DPI instead of 300, lower the quality to about 80 %, or compress the images first. Original resolution keeps every pixel, which documents rarely need.

A photo appears sideways in the PDF

With Orientation set to Auto, each page follows the shape of its image. If a photo is itself stored sideways, rotate it with the Image Cropper or the Image Editor first, or set the orientation to Portrait.

Transparent areas came out white

The pages are made from JPEG images, which have no transparency, so transparent pixels become white: the colour of the paper they will be printed on.

Questions about the Image to PDF Converter