Or click this area to pick several images (add more at any time — they go to the end of the list)
☰ handle on the left, or use the ↑ / ↓ buttons on the row.When you submit paperwork you are often told to "combine it into one PDF", and the reasons are practical: a PDF is a single attachment, so nothing gets left out; the page order is fixed and will not be reshuffled by whatever file manager the recipient uses; and it prints in one go instead of opening image after image and fixing the paper size each time. Expense claims with receipts, tender documents, visa evidence, homework photographed from a notebook — the requirement is the same. Images are fine in themselves; a dozen loose images passing through other people's hands is what goes wrong.
It depends on whether the file will end up on paper. If it is only going to be read on a screen, choose "Fit to image": every page has the image's own aspect ratio, there is no spare white around it, and each page fills the screen as you swipe through. If it will be printed, or submitted somewhere with format rules, choose A4: every page is a standard sheet, the printer does not have to guess how to scale it, and the result binds neatly. Phone photos are usually 4:3 or 3:4, so on A4 there will be white space at the top and bottom or on the sides — that is normal. Reduce the margin to narrow the white border, or pick "Fill and crop" to cover the page completely, at the cost of losing a little around the edges.
No. JPG and PNG are embedded byte-for-byte into the PDF: the bytes are written to the file unchanged, with no re-encoding, so there is no second round of compression and what you see in the PDF is the original. Only two things force a re-encode: "Fill and crop" when the aspect ratios differ, because part of the picture really has to go; and formats PDF does not understand (WebP, AVIF, BMP), which the browser converts to JPG first. Both are covered in the FAQ below. The reverse is also true: a PDF cannot make an image sharper — a blurry original stays blurry.
A few habits make a noticeable difference when photographing paper with a phone: flatten the sheet first and move so the ceiling light does not glare off it; keep all four edges of the paper in frame and roughly level, so the page is not crooked once it lands on A4; and shoot a whole batch in one sitting, so exposure and colour temperature match. If you are photographing an ID card or bank card, check that the recipient really needs an image of the original before you build the PDF — once that file leaves your hands you cannot get it back. This page uploads nothing, but what you do with the file afterwards is outside its reach.
This page does image → PDF. To go the other way and save PDF pages as images, use PDF to Image. If you already have several PDFs to join in order, or want to keep only some of their pages, use Merge PDF. If after combining you find one page actually holds two pages of content — a book photographed lying open, say — use Split PDF Pages to cut the layout apart.
No. Reading the images, laying out the pages and building the PDF all happen locally in your browser, so nothing is uploaded — which is what you want for photos of ID cards, invoices and contracts. Once the page has loaded you can go offline and keep using it.
JPG and PNG are embedded byte-for-byte with no re-encoding. WebP, AVIF, BMP and GIF are not part of the PDF standard, so the browser converts them to JPG first — the picture looks the same, but it does go through one re-encode. Whether HEIC (the iPhone default) can be read depends on the browser: Safari can, most desktop browsers cannot. Any image that will not open is listed on the page and skipped; export it to JPG first and it will work.
No. By default images are embedded byte-for-byte, so the pixels in the PDF are exactly the pixels in the original. A re-encode only happens when you pick "Fill and crop" and the aspect ratios differ, because part of the picture genuinely has to be cut away, or when the format is one PDF cannot hold, such as WebP. Nothing else is recompressed.
The page takes the image's aspect ratio with no white border, sized at 1 pixel = 1 point (1/72 inch). Phone photos are easily four thousand pixels wide, which would give a page tens of inches across — odd to look at — so once the long edge would exceed A4, the whole page is scaled down to A4. Only the page's physical size shrinks; not a single pixel of the image data is touched, so it stays exactly as sharp, and it does not print any blurrier.
"Fit inside" keeps every pixel, leaving a white border when the page and the image have different aspect ratios — for anything you are submitting, this is what you want. "Fill and crop" enlarges the image until it fills the available area and cuts off the rest, which suits cover pages or shots where the edges do not matter. With page size set to "Fit to image" the page already has the image's aspect ratio, so the option is meaningless and is greyed out.
Pages follow the list from top to bottom, one image per page. The default is the order you added the files — note that this is not necessarily filename order, because a multi-file selection does not always arrive sorted by name. To change it, drag the handle on the left of a row, or use that row's ↑ / ↓ buttons.
With orientation set to "Auto" the page turns instead: landscape images get a landscape page and portrait images a portrait one, so each fills as much of its page as possible. If you want one paper orientation throughout — for double-sided printing and binding, say — set it to "Portrait" or "Landscape"; a landscape image on a portrait page is scaled down and centred, never rotated.
No. Words inside an image are just pixels as far as the PDF is concerned; there is no text layer, so nothing can be found or copied. Getting a searchable PDF requires OCR, which is a different job and not what this tool does. If your document is only going to be read or printed, the missing text layer makes no difference.
There is no limit on the count. Images are embedded one at a time and released as soon as each is done, so memory does not creep upwards. The real limit is total size: a few dozen untouched phone photos can easily add up to several hundred megabytes, the resulting PDF will be just as large, and the browser needs a moment. If the file is only going to be looked at, compress the images before combining them.
Use 0 for something that will only be viewed on screen. For printing, leave 5 to 10 mm: home printers physically cannot print the outermost few millimetres, so with a margin of 0 the outer edge of your content may be lost. Leave more if it will be bound. With "Fit to image", the margin is white space added outside the picture; it never shrinks the picture itself.