Convert Images to PDF
Combine photos, scans, or screenshots into a single PDF with one image per page, arranged in the order you choose. Page sizes are real physical sizes — A4, Letter, or matched to the image — because a PDF is measured in inches rather than pixels, and getting that conversion wrong is what produces documents that print across four sheets.
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Add to Chrome — freeDrop your JPG file here, or click to browse
Up to 50 MB. Deleted automatically after 30 minutes.
What it does
- One page per image, in an order you control
- A4, Letter, Legal, A3, A5, or page matched to the image
- Automatic orientation per image
- Warns when an image is too low-resolution to print well
- Accepts WebP, AVIF, GIF, BMP and SVG as well as JPG and PNG
How to use JPG to PDF
- 1
Add your images
Drop them in. JPG and PNG are embedded directly; other formats are converted automatically and the conversion is reported.
- 2
Put them in order
Use the arrows to rearrange. The PDF follows this order top to bottom, one page per image.
- 3
Choose the page setup
A4 or Letter for something to be printed. Match each image if the PDF is only ever going to be viewed on screen.
- 4
Convert and save
Press the button and save the PDF. The panel reports any image that will look soft when printed.
How it works
Every measurement in a PDF is in points, and a point is exactly one seventy-second of an inch. An image, by contrast, is a grid of pixels with no inherent physical size at all. Converting between the two is the only genuinely interesting part of this tool, and it is where most image-to-PDF converters go wrong.
With a fixed page size, the page is a known physical rectangle — A4 is 595 by 842 points — and the image is scaled to fit inside it, preserving its aspect ratio, then centerd. Nothing is cropped and nothing is stretched. If orientation is set to follow the image, a landscape photo turns the page landscape rather than being shrunk into a portrait one.
With "match each image", the page is made from the image's pixel count divided by a resolution you choose. This is the setting people misunderstand, because the resolution is not a property of the image — a 3000-pixel photo is 31 inches at 96 DPI and 10 inches at 300 DPI, and both are equally correct descriptions of the same file. The default of 96 matches how a screen treats pixels; 300 is what a printer wants.
Embedding. PDF can store exactly two kinds of image data: JPEG and PNG. Files already in those formats are embedded byte-for-byte, so nothing is re-encoded and no quality is lost. Anything else — WebP, AVIF, GIF, BMP, SVG — is drawn to a canvas and re-encoded first, choosing PNG when the source had transparency and JPEG when it did not. That conversion is reported rather than done silently.
When you'd use this
Photographed documents are the dominant case: taking pictures of a form, a contract, or a set of receipts with a phone and needing to submit them as one PDF. Almost every institutional upload form wants a PDF and will not take a folder of JPGs.
Scans that came out as images, either from a scanner set to image output or from a phone scanning app that saved individual files.
Portfolios and simple photo collections where the point is one image per page in a fixed order.
Screenshots assembled for a report, a bug submission, or a record of something on screen.
Choosing a page size, briefly
If it will be printed, choose A4 or Letter. The image is scaled to fit and the result is a normal page that behaves normally in a print dialog.
If it will only be viewed on a screen, "match each image" avoids letterboxing — the page is exactly the shape of the picture, with no white margins.
If you are unsure, choose A4. A slightly letterboxed page is a much smaller problem than a page that turns out to be a meter wide when someone tries to print it.
Examples
Photographed documents into one A4 file
Each photo is scaled to fit the A4 page and centerd, never cropped or stretched. A 3024x4032 image filling an A4 page works out at 366 DPI, comfortably past the 150 DPI threshold below which printed output starts looking soft, so no warning is raised.
A screenshot where the page should match the image
At 96 DPI a 1920-pixel width is 20 inches, or 508 millimeters — wider than A3. That is correct for something only ever viewed on screen and wrong for anything you intend to print. Selecting 300 DPI instead would make the same image a far more sensible 163 millimeters wide.
Frequently asked questions
Why is my PDF page enormous when I chose "match each image"?
Because pixels have no physical size until you name a resolution. At the default 96 DPI, a 3000-pixel-wide photo is 31 inches wide, so the page becomes 31 inches. That is right for a screenshot destined for a screen and wrong for a photograph destined for paper. Choose 300 DPI for print, or pick a fixed page size like A4 and let the image be scaled to fit it.
Does converting to PDF reduce the image quality?
PNG bytes can be embedded directly. JPG images are re-encoded at high quality so camera orientation metadata is applied before the image enters the PDF; this prevents phone photos from appearing sideways. Other formats also have to be re-encoded because PDF can only store JPEG and PNG data, and that conversion is reported next to the result.
What does the DPI warning mean?
It compares how many pixels the image has against how large it will be on the page. Below about 150 pixels per inch, printed output looks visibly soft and slightly blocky, even though the same image looks perfectly sharp on a screen. The warning appears only when it applies, and it is safe to ignore for a PDF nobody will print.
Can I put several images on one page?
No — this tool is deliberately one image per page. Multi-image layouts are a page design problem with margins, gutters and alignment, and doing it badly produces worse results than a word processor would. If you need a contact sheet, build it in a document editor and export that to PDF.
Are my photos uploaded to make the PDF?
No. The images are read from your disk into this browser tab, and the PDF is assembled in memory and written back to your disk. Nothing is transmitted. That matters here more than for most conversions, because the commonest reason to make a PDF of photographs is that they are photographs of documents — ID, contracts, forms, receipts.
Further reading
- Converting a PDF to Grayscale Made It BiggerRemoving color sounds like removing data, so grayscale gets used as a compression step. On a document that was already black text on white, the conversion made the file larger — and the reason it did is the reason it sometimes makes a scan dramatically smaller.
- One Page Out of Eight Was a Quarter of the FileSplitting a document feels like slicing a loaf: take an eighth, get an eighth. PDFs do not divide that way. A single page pulled out of an eight-page file was a quarter of it, and the gap between what you expect and what you get is the most useful thing a PDF will teach you about its own structure.
- Six Ways to Shrink an Image, and What Each One CostsEvery image editor has a dropdown of resampling filters with names like Bicubic, Lanczos and Nearest Neighbor, and almost nobody changes it. The differences between them are real, they are measurable, and which one is right depends on what is in the picture rather than on which sounds most advanced.