Pictures to PDF: every format, in the order you want

Pictures into 1 PDF in about 60 seconds

The whole job, with a real example. Jane Cooper is handing back a flat in Vienna and owes the landlord 12 photos of its condition, as 1 file.

1. Drop the pictures. All 12 at once, or the whole folder; subfolders are included. A mix of formats is fine.
2. Check the order. The pictures become pages in exactly the order of the file list. Jane moves the hallway photo from position 9 to position 1 with its Up button, because the report should start at the front door.
3. Pick the page. A4, Portrait, a 10 mm margin, so the file prints like a document and the landlord can write next to each photo.
4. Make the PDF and download. The PDF lands in Downloads, 12 pages, 1 photo per page, ready to attach. Give it a name the recipient understands (flat-handover-2026-10-11.pdf beats output.pdf) and send it on.

That is the entire path. No account, no watermark, no page limit, and the photos never leave the device. The rest of this guide covers the decisions along the way: what each format turns into, which page size to pick, how to get the order right first time, and where this tool honestly stops.

What each format becomes inside the PDF

A PDF is a container, and different image formats travel through it differently. This matters for file size and for sharpness, so here is exactly what happens to each:

The two rows that surprise people: JPG and PNG are not re-encoded at all, so the conversion itself costs 0 quality. (One exception: a progressive or CMYK JPG is decoded once and stored losslessly, which makes it larger; the result names the picture and says why.) HEIC and the web formats have to be decoded first, because most PDF readers cannot display them; HEIC, and a WebP or AVIF photo, comes out as JPEG at quality 90, which is high enough that the difference is not visible in normal viewing.

If your whole set is iPhone photos or saved web images, the dedicated tools do the same job with the format handled front and centre:

A4, Letter or the picture’s own size: picking the page

You choose between a fixed paper (A4, US Letter, US Legal, A3, A5) and Same as the picture, pages shaped like the pictures themselves. The right answer depends on where the PDF is going.

A4 or Letter gives every page the same size, with the picture scaled to fit inside the margins. Pick this when the PDF will be printed, filed or uploaded to a portal that expects a document: A4 (210 x 297 mm) in Europe and most of the world, Letter (8.5 x 11 in) in the US. The margin keeps printers happy and gives a reader space to annotate. Scaling a picture onto a page never touches its pixels; it only changes how large it displays. If you are unsure, pick the paper your reader prints on: a Letter PDF printed on A4 shrinks slightly, an A4 PDF on Letter clips or shrinks, and neither looks wrong enough to redo, but matching saves the question.

Same as the picture makes each page exactly the picture’s own shape and size, edge to edge, at the resolution the file states (96 dpi when it states none). Pick this for screenshots, graphics and anything read on a screen, because nothing is scaled and 1 px text survives. On paper it is the odd choice, since every sheet would be a different size.

Orientation applies to the fixed sizes: Portrait keeps every page upright and lets wide photos sit smaller, Auto (the default) turns each page to match its photo so landscape photos stay large. The margin is a number in millimetres, 0 by default, which suits screens and portals; 10 to 15 mm suits anything that gets printed or hole punched. Fit shows the whole picture inside the margins, Fill covers the page and crops what sticks out, Stretch fills it and distorts the picture.

Put the pages in the right order

The pictures land in the PDF in the order of the file list, and that order starts as the order your browser hands the files over. Here is the trap: some programs sort filenames as text, so photo-1.jpg, photo-10.jpg and photo-11.jpg all come before photo-2.jpg. A 12-photo set can arrive as 1, 10, 11, 12, 2, 3 and the PDF reads like a shuffled deck. A dropped folder is the exception: the tool sorts its files the way people count, so photo-2 comes before photo-10.

Two fixes, use whichever is less work:

1. Move them in the list. Before converting, press Up or Down next to a picture to move it 1 place; Remove drops one. For a dozen pictures this takes seconds, on a phone or a laptop.
2. Rename with leading zeros. For bigger sets, rename to 01-..., 02-..., 03-... before you start. Text sorting then matches human counting and the set arrives already ordered. Karol Michał names his 48 site photos 01-entrance.jpg through 48-roof.jpg and never touches the order again.

Mixed shapes are not a problem, only a decision. A set that mixes portrait and landscape photos can keep every page portrait, with the wide photos sitting smaller inside the margins, or let each page follow its photo’s orientation. The first reads better on a screen, where rotated pages mean tilting your head; the second prints larger. Decide once for the set, with Portrait or Auto, before converting.

If you spot a wrong order only after downloading, you do not have to redo the set: reordering pages in a finished PDF is its own small job, covered in how to organise PDF pages.

One PDF, or one PDF per picture

The default, Output “One PDF, a page per picture”, is 1 combined file, which is what most jobs want: an application, a report, an album, an expense claim. “One PDF per picture” writes 1 file per picture, for portals that insist on separate files per document, or when each picture goes to a different recipient.

The two modes combine well with merging. Convert today’s pictures to their own PDF, then use Merge PDF to add them to the file you built last week; a forgotten photo can be converted alone and merged into position instead of redoing everything.

Transparent PNGs, whole folders, and other details worth knowing

Transparency is your choice. A PNG with a transparent background (a logo, a stamp, a signature) can keep its transparency in the PDF, where the page’s own white shows through, or be flattened onto white for a guaranteed consistent look in every viewer. The Transparency switch appears as soon as a PNG, WebP, AVIF or GIF is in the list, set to “kept”.

A whole folder drops in one go. Drag the folder itself onto the tool, or click “or a whole folder” under the drop zone, and every picture inside is picked up, subfolders included; files that are not pictures are left out, and the page says how many. Handy when a month of receipts lives in nested date folders.

It works on phones. The tool runs in Safari on iPhone and in the browsers on Android, with the same ordering and page choices. JPG, PNG, TIFF and HEIC are read by the tool itself; WebP, AVIF, GIF and BMP are decoded by your browser, which every current browser can do. iPhone HEIC photos need no detour through screenshots or exports.

Animated GIFs become still pages. A GIF converts, but a PDF page does not animate; you get the image as a page, not the motion.

Quality: where blur really comes from

The conversion keeps the pixels you give it. A JPG’s picture data is embedded as it is, a PNG stays lossless, and page size is a display decision, not a resampling step: a 4,000 px photo placed on A4 is still a 4,000 px photo, it just has a size in centimetres now. That works out to about 340 DPI across the page, which is more than a magazine print uses, so “will A4 make my photo worse” has a short answer: no.

So when a picture PDF looks soft, the cause is one of two things. Either the source was soft (a zoomed phone photo, a picture recompressed by a chat app), or the PDF was compressed afterwards, which re-encodes the images inside it to shrink the file. That second step is often worth it, 12 full-size photos can make a 40 MB file that no email accepts, but it is a trade you should make knowingly. Compress PDF shows the before and after sizes, and how to make a PDF smaller explains the levers.

Nothing is uploaded, and your photos do not say where you were

Every converter in this guide runs on your device, in the browser. The pictures are read, decoded and written into the PDF locally; no file bytes are sent to any server. That is not a promise to take on trust: convert once (the first file you drop fetches the engine, 4.6 MB, which your browser then keeps), turn Wi-Fi off, and convert again. It still works, because there is nothing to send and nowhere to send it.

A phone writes more into each JPG than the picture: the GPS position where it was taken, the phone model and the time. JPG to PDF leaves those camera details out and copies only the picture data, unchanged, and the result says how many photos it cleaned (“Left out the camera details of 12 photos”). So Jane’s handover photos do not carry the map position of the flat. HEIC and the other formats are decoded and written fresh, so their camera details do not travel either.

This is also why there are no limits to sell you past. No account, no daily task cap, no file-size tier, no watermark. The only real limit is your device’s memory.

What this tool does not do

The honest part, so you pick the right tool the first time:

• A photo of a document is not a scan. Converting a phone photo of a contract gives you that photo on a page: the keystone skew, the shadows and the tabletop all stay, and the text in it is a picture, not selectable text. For a document someone must search, quote or archive, run OCR on the result or scan properly; how to make a scanned PDF searchable covers both.
• It does not guess rotation. Phones record which way up a photo was taken, and the tool obeys that note. But a photo whose orientation data was stripped by an editor or a messenger arrives with no note to obey, and the tool does not rotate it; it converts the pixels as they are. If a page comes out sideways, turn it in the finished PDF with Rotate PDF, or rotate the photo in your gallery and convert again.
• A big album makes a big file. The pictures keep their size, so 200 photos at 4 MB each come out near 800 MB. The conversion handles it, memory permitting, but almost nothing accepts a file that large; plan on compressing the result, or question whether 1 PDF is the right container at all.
• Sometimes the built-in way is enough. Windows and macOS can print 1 or 2 ordinary JPGs to a plain PDF with nothing installed, and for that tiny job the built-in dialog is quicker than any website, including this one. Come here when order, mixed formats, page size, margins or transparency actually matter.