Image to PDF puts photos or scans into one PDF in your browser, one image per page, on A4, Letter, Legal, A3, A5 or a page the size of each image, with margins, rotation and page order you set.
Builds a PDF in your browser with one page per image, in the order shown in the grid. Each image is drawn onto its page inside the margins, either fitted whole or filling the page, and stored as JPEG at the quality you choose so the file stays reasonable. The page can be a standard paper size in portrait or landscape, Auto to match each image, or Fit image, which makes every page exactly the size of its picture with no white space, the way scanning apps do.
The images are never uploaded. They are decoded in the tab and shown as small thumbnails, so fifty phone photos do not slow the page down, and each is only drawn at full size while its page is written.
Twelve phone photos of a signed contract, 4032 × 3024 each and 3 MB apiece, become a 12-page A4 PDF of about 4.5 MB at quality 88 with 10 mm margins, because each page is re-rendered at 300 dpi for A4 rather than embedded at full size. The same twelve with Fit image and quality 75 give a 2.9 MB file whose pages are the photos themselves. A single 1200 × 1600 receipt scan on Letter comes out at roughly 210 KB.
Here is where the A4 numbers come from. A4 is 210 × 297 mm, and 10 mm margins leave a 190 × 277 mm area. A 4:3 landscape photo fitted into that is 190 × 142.5 mm. At 300 dpi, 11.8 pixels per millimetre, the page stores it at 2244 × 1683 pixels, about a third of the original 12 megapixels. With Orientation set to Auto the page turns to landscape, the photo fills 253 × 190 mm and is stored at 2992 × 2244 pixels instead.
With Fit image there is no paper to fit, so each page is sized to its photo and all 4032 × 3024 pixels are kept; only the JPEG quality changes the file size.
Use it when someone asks for a PDF instead of a pile of images: a scanned form, receipts for an expense claim, a photo report, a portfolio. Straighten and trim the scans first with Rotate Image and Crop Image, since the PDF keeps whatever you give it. If the file must be tiny, run the images through Image Compressor first or drop the quality slider; if you already have a PDF and need to add pages, this tool starts from images only.
It is also the wrong tool when the reader needs to search or copy the text, or when a form must be filled in on screen: every page is a picture. If someone asked for images in another format rather than a PDF, use Image Format Converter instead.
Page size sets the paper; Fit image removes the paper entirely and sizes each page to its picture. Orientation Auto turns wide photos to landscape and tall ones to portrait per page. Margin is in millimetres and applies on all sides. Fit whole image never crops but may leave white bands; Fill the page covers the content area and trims the overflow evenly. Image quality is the JPEG setting inside the PDF: 80 to 90 is fine for reading on screen, 95 for print. Page colour fills the paper and any transparent areas of PNGs. The Order chips sort by file name, by the date the file was last changed, or reverse the current order.
A3 (297 × 420 mm) suits posters and drawings, A5 (148 × 210 mm) booklets and flyers, and Legal is 8.5 × 14 inches. Margin runs from 0, edge to edge, to 50 mm, with shortcuts for 0, 5, 10 and 20. Each page has its own rotate arrow, and Rotate all 90° turns the whole set when a scanner fed everything sideways.
Page numbers adds “2 / 5” centred at the bottom of each page when there is more than one; with a margin under 6 mm it sits on the image. One PDF per image delivers a ZIP of single-page PDFs. File name accepts {date} and {n}, so the default images-{date} saves as, for example, images-2026-10-12.pdf. Settings are remembered on this device.
Why is the PDF smaller than my photos put together? Pages are rendered at up to 300 dpi for the chosen paper size. A 4032 × 3024 photo on portrait A4 with 10 mm margins is stored at 2244 × 1683 pixels, and re-encoded at the quality you set. Use Fit image and quality 100 if you need every pixel kept.
Can I mix portrait and landscape pages? Yes. Set Orientation to Auto and each page turns to suit its image, or use Fit image so every page is exactly the image's shape.
How do I change the page order? Drag the handle in the corner of any thumbnail, or use the Order chips to sort by name or date. The number on each thumbnail is its page number.
Is the PDF made on a server? No. The PDF is assembled in your browser with a small library that loads only when you click Download. Your images never leave the device.
How do I make the PDF smaller for an email or upload limit? Lower Image quality to around 75, which the slider labels good for screen, and use A4 or Letter rather than Fit image, because a paper size caps each page at 300 dpi. If it is still too big, shrink the photos first with Image Compressor or Resize Image.
Will the text in my scans be searchable? No. Each page is a picture, so you can read and print it but not search or copy the words. That needs OCR, which this tool does not do.
Can I make a separate PDF for each image? Yes. Turn on One PDF per image. You get a ZIP with one single-page PDF per picture, each named after its image file.
Does it work on a phone? Yes. Choose photos from the gallery or camera, reorder them with the drag handle, and download. On a phone the PDF goes to your downloads or the Files app.