Combine images into one PDF

• A portal that takes a single attachment can have your photos of a form, a receipt and an ID as one document.
• Photos taken sideways by a phone are turned upright first, so pages come out the way the preview looks.
• A4 or Letter pages print cleanly, and the same-shape option keeps a screenshot or a scan exactly as it was without blank bands.
• No account, no watermark and no limit on the number of images set by the tool.

1. 1

   Drop your images

   Drop your images onto the box, or click it to browse. JPG, PNG and WebP work, and you can mix them in one batch. Add more at any time.

2. 2

   Put them in order

   Put the pages in order. Drag a thumbnail onto another one, or use the arrow buttons under each image. The number on each thumbnail is its page number.

3. 3

   Choose page size and margin

   Choose the page size (A4, US Letter, or a page the same shape as each image), the orientation and the margin. Orientation and margin do not apply to the same-shape option, because there the page is the image.

4. 4

   Download the PDF

   Press Combine images into one PDF. The file downloads as images.pdf with one image per page, in the order shown.

A student has to hand in four pages of handwritten maths as one PDF. They photograph the pages with a phone, drop all four in, drag page three back to its place, choose A4 with a small margin and download images.pdf. The portal gets one file and the photos stay on the phone.

Each file is read into memory with the browser's file API and embedded into a new document with pdf-lib. A PNG is embedded as it is. A JPEG is embedded as it is when its EXIF orientation flag says it is already upright. A JPEG with a rotation flag, a WebP and any other image format the browser can display is first drawn onto a canvas, with the rotation applied and transparent areas filled with white, and re-encoded as a JPEG at 92 percent quality before it is embedded. Each page is then sized from your choice, and the image is scaled to fit inside the margin and centred. Nothing is sent to a server. Open the Network tab in your browser's developer tools while you convert and no request carries your images.

• A JPEG that needs rotating, a WebP and other non-PNG formats are re-encoded as JPEG, so they lose a little quality and a transparent background turns white. A PNG and an upright JPEG are embedded without re-encoding.
• Pages are A4 (595 by 842 points), US Letter (612 by 792) or the shape of the image. There is no custom size in millimetres and no per-page setting: size, orientation and margin apply to every page.
• Images are scaled up to fill the page, so a small image on a large page can look soft.
• HEIC photos from an iPhone are not readable in most desktop browsers. Safari on an iPhone converts them when you pick them from the Photos library, and elsewhere you need to export them as JPG first.
• A very large batch uses your device's memory, because every image is held in memory while the PDF is built. A phone may struggle with dozens of full-size photos.
• The output does not contain searchable text. To make it searchable, run OCR PDF on the result.

iLovePDF, Smallpdf and PDF24 all offer this kind of job, and the online ones upload your file to their servers to do it. Here the work happens in this tab instead. Read the honest comparisons with iLovePDF, Smallpdf and PDF24, including where they are the better choice, or how to check that a tool does not upload.