How to Convert Images to PDF (Without Installing Anything)
Last week I had to send a receipt to my insurance company. They wanted a PDF. I had a photo on my phone. That was the entire problem, and it still took me far longer than it should have.
Printing to PDF from the Photos app put the image tiny in the corner of a letter-sized page, and an online converter made me sit through an upload only to hit me with a “sign up to download” modal. In the end I emailed it to myself and used Preview on the Mac. Four steps across two devices for something that should take ten seconds.
That afternoon is why PDF output exists on heic.site at all. It shipped as one of the features I launched with Pro.
Why anyone needs image-to-PDF conversion
It comes up more than you’d think. Insurance is the one I keep running into: every claim I’ve filed wants PDF attachments and quietly refuses the JPG I already had on the phone. Estate agents are the other regular — inspection photos, signed disclosure forms, anything that has to reach the other side as a document rather than a picture.
The pattern doesn’t vary. You have an image and somebody needs a PDF. There’s no good reason for anything to sit in between.
The usual options, and why they grate
Adobe Acrobat does the job perfectly well and costs $20 a month, which is quite a lot of money to spend on turning one photo into one PDF.
Online converters upload, process, and hand the result back. Most of them are fine. I’m still not comfortable putting insurance paperwork or a photo of my passport on a machine I know nothing about, and the free ones tend to make up the difference in ads or cut you off after two files.
Print to PDF from your operating system works, technically, but gives you no say over page size, so your image ends up floating in a sea of white margin on a letter-sized page while the printer dialog insists everything is fine.
Preview on Mac handles it properly. It’s Mac-only. The export also hides under File → Export as PDF rather than anywhere you’d think to look.
How it works on heic.site
Pick PDF as your output format and drop your images in. Each one comes back as a PDF filled edge to edge, and the page dimensions follow the image — a landscape photo gives you a landscape page, a portrait shot a portrait one. No margins to crop.
The conversion runs entirely in your browser through a library called pdf-lib, so your photos never leave the device and there’s no upload to wait on. A 15-megapixel photo takes under a second on my phone.
Drop several images at once and you get one PDF each. Download them singly or take the lot as a ZIP.
Multi-page PDFs aren’t built yet
One image, one PDF. That’s where it stands today. If you need five photos in a single five-page document, convert each one and then merge them in something like PDF Arranger, or in macOS Preview by dragging thumbnails from one window into another. Combining several images into one document is on my list, and I’d rather tell you that now than let you find out after paying.
Which formats go in
Everything the converter takes as input: HEIC, AVIF, WebP, PNG, JPG, GIF, BMP and TIFF. iPhone photos to PDF is far and away the most common run, though nothing stops you feeding it a screenshot instead.
The PDF holds a JPEG or PNG copy of your image inside it, so expect a file roughly the size of a high-quality JPEG. There’s no extra compression pass at my end. What was in the original photo is what ends up in the document.
The privacy part
I keep coming back to this because it’s the part that actually matters. A receipt, an ID scan, a letter from a doctor: none of that belongs on some company’s server for the sake of a file extension. The conversion happens inside your browser tab, which means I have no copy to lose, hand over or leave lying around.
If you do need to get the finished PDF to somebody else, Pro accounts can generate a temporary download link that expires after 24 to 72 hours. That step stays optional — downloading the PDF and attaching it to an email yourself works just as well.
Give it a go
Head to heic.site, choose PDF as your output format, and drop an image in. PDF output is a Pro feature, but the free formats will show you how the converter behaves before you decide anything: JPG, PNG and WebP, plus AVIF if your browser can encode it. Once you’ve got your PDFs, you can share them with a temporary link on the Pro plan.