Image to PDF

Photos in, one PDF out

A form comes back as four phone photos. A receipt is a JPG. Whoever asked for it wants one PDF, and would like it today.

Add the images, put them in the order you want with the Move buttons, pick a page size, and click Create PDF. The order in the list is the order in the file.

One limit is worth knowing before you start: this tool reads JPG, PNG, and WebP, and nothing else. A HEIC photo straight off an iPhone gets a row telling you to convert it first, rather than a silent failure at the end. There is a free HEIC to JPG tool here for exactly that.

Page sizes and orientation

Fit to image is the default. Each page becomes exactly the size of its image: no borders, no scaling, no white gutters around a photo that was never meant to be A4.

A4 and Letter give every page a standard paper size. Orientation follows the image, so a landscape photo gets a landscape page, and the image is centered inside a half-inch (36 point) margin.

Images are scaled down to fit when they need to be, and never scaled up past their natural size, so a small image stays small instead of turning soft.

What happens to image quality

Most files are not re-compressed at all.

A JPEG goes in byte for byte. A PNG is embedded as PNG and stays lossless, though transparent areas are flattened against the page, because a PDF page is not transparent.

Two cases do get re-encoded once, to JPEG at 92 percent, and the row on screen says so before you build anything. WebP, because a PDF cannot hold WebP. And a JPEG carrying an EXIF rotation flag, because PDF viewers ignore that flag and the page would otherwise come out sideways.

Embedding JPEGs untouched has one honest side effect: the metadata inside them travels too. Camera model, timestamps, and GPS coordinates ride along into the PDF. If that matters, run the photos through Remove EXIF data first.

Where the work happens

Your images are never uploaded.

They are decoded, laid out, and written into a PDF by JavaScript running in your browser, and the finished file downloads to your device as noadstools-images.pdf.

The page does fetch one thing of its own. When you click Create PDF, and not a moment before, it loads the jsPDF library (about 420 KB) from noadstools.com. That is the PDF writer arriving, not your pictures leaving, and it is the only extra request this tool makes. After it lands, building PDFs needs no network at all.

You do not have to take that on faith. Open the DevTools Network tab and watch what moves while you build a file.

The full source code is public on GitHub under the AGPL-3.0 license, and the privacy page shows that one request standing on its own.

Questions

Is there a free image to PDF converter online?

Yes. This page is one.

No account, no email, no watermark, and no page cap. Your images are read, laid out, and saved by your own browser.

Are my images uploaded to a server?

No.

The PDF is assembled in your browser. The only thing the page downloads is its PDF-writing library, from noadstools.com rather than a third-party CDN.

Open DevTools on the Network tab while you use the tool. No image data leaves your device.

Which page sizes can I choose?

Three: Fit to image, A4, and Letter.

Fit to image matches each page to its image exactly. A4 and Letter follow each image's orientation and center it inside a 36 point margin.

Does making a PDF reduce my image quality?

Usually not at all.

JPEGs are embedded without re-compression and PNGs stay lossless. Only two cases are re-encoded, once, to JPEG at 92 percent: WebP files, and JPEGs whose EXIF rotation flag would otherwise leave the page sideways. The row for each file tells you which path it took.

Can I change the page order?

Yes. Every row has Move up, Move down, and Remove buttons.

The PDF follows the list exactly, top to bottom.

Can I add HEIC photos from an iPhone?

Not directly. PDF has no way to store HEIC.

Run them through the free HEIC to JPG tool first, then add the JPGs here. A HEIC file dropped on this page gets a row saying so, so you find out at the start rather than at the end.

Related tools

HEIC to JPG | convert iPhone photos before adding them here. Remove EXIF data | strip location and camera metadata before it reaches a PDF. Merge PDF | join the finished PDF to other documents. Photo Editor | crop, resize, redact, and batch-edit images.