A PDF written in the tab
A PDF of pictures is a simple thing: a page box, an image placed on it, and sometimes a clip so the image only shows inside a cell. This page writes exactly that with a small PDF writer of its own, inside the tab, so there is no server to send the pictures to and no library to trust with them. The useful consequence is that a JPEG needing no change goes in untouched: the PDF holds the same compressed bytes the file held, and fitting it into a cell or cropping it to one is done by the PDF’s own placement and clip rather than by re-saving the picture.
Three ways onto pages
- One picture per page. On a fixed paper size with a margin, turned to suit each picture when orientation is left on per picture — or on pages the size of each picture, at 96 pixels to the inch.
- Several per page. Two, four or six to a page, each fitted or filled into an equal space.
- One long image, cut into pages. For chats, receipts and long screenshots: stacked at one width, then cut at the page height, with each break nudged to a quiet row.
A worked example
Twelve phone photos at 4032 × 3024 (about 3 MB each) and three PNG screenshots at 1170 × 2532, one per page on A4 with a 10 mm margin. The photos are landscape, so with orientation per picture their pages turn landscape; each JPEG is fitted at 253 × 190 mm and embedded as it was, so those twelve pages add about 36 MB — the size of the photos. The screenshots keep portrait pages and are stored losslessly, about 3–5 MB each depending on how much flat colour they hold. The done line reports twelve JPEGs placed exactly as they were and three stored without loss.
Privacy, specifically
The PDF is assembled from the pictures in this tab’s memory and handed to your downloads folder. Nothing is uploaded to make it, the document title is “Merged pictures” unless you choose otherwise, and no author or device name is written into it.
Pictures in, PDF out. Adding existing PDF pages to the set is not offered. A photo turned upright from its camera tag cannot go in byte for byte, because its stored pixels lie on their side; it is stored again, losslessly unless you chose JPEG.
Snags when merging images into a PDF
Does putting my JPGs into a PDF make them worse?
Not when they need no change. A JPEG that is upright and whole is written into the PDF byte for byte — the same compressed data, not decoded and saved again — so it is exactly as good as the file you added. Pictures that had to be turned upright, PNGs and screenshots are stored without loss by default; untick “keep exact pixels” to save those as JPEG instead and get a smaller file.
How do I change the order of the pages?
The order of the pictures is the order of the pages. Use the arrows on each picture's card to move it earlier or later, or remove it and add it again at the end. The preview steps through the pages with the arrows under Preview page.
I have one very long screenshot. Can it become normal pages?
Choose One long image, cut into pages. The pictures are stacked at the first one's width and cut into pages the shape of the paper you chose. With cut-between-lines on, each break moves up to the quietest row within five per cent of a page, so a line of text is not sliced in half across two pages.
Why is my PDF so big?
Usually because PNGs or screenshots were kept as exact pixels, which is lossless and therefore heavy, or because the pictures themselves are large. The estimate under the preview adds it up before you save. Switching off exact pixels stores those as JPEG at the quality you set; JPEGs you added are not affected either way.
What name and title does the PDF get?
The file is saved as merged-pictures.pdf and its document title is “Merged pictures” — not your file names — unless you tick the option to use the first file's name. No author is written into it.
