What is the Image to PDF Converter?
The Image to PDF Converter turns one image, or a whole pile of them, into a single PDF. Drop in PNG screenshots, JPG camera shots, WebP files from a download, a BMP from an old scanner, a GIF, or HEIC photos straight off an iPhone. Mix them however you like. Each image becomes one page, in the order you set, and you download one file.
That's the job most people have. Your phone shoots HEIC, your laptop saves screenshots as PNG, the receipt someone emailed you is a JPG, and the image you saved from a website turned out to be WebP. You want one PDF out the other end, and you don't want to sort anything by format first.
It all runs in your browser. Nothing uploads, there's no account, no watermark, and no "3 files per hour" counter. The limits are 20 MB per image and 100 MB for the whole batch.
How to convert images to PDF
- Drop your images onto the box, or click it to pick files. You can add more files in a second batch and they join the list.
- Set the page order with the ↑ and ↓ buttons next to each file. The top of the list is page 1. The × button removes a file.
- Click Convert to PDF. The button counts through the images as each one is added: "Adding image 3 of 9…".
- Click Download. The file is named after your first image: one photo called
receipt.jpgbecomesreceipt.pdf, andvacation.jpgplus seven others becomesvacation-and-7-more.pdf.
That's the whole flow. There's no settings screen to get through, because the converter makes the one decision that never needs undoing: every page is the exact size of its image, so nothing gets cropped, squashed or letterboxed.
Which image formats work
Different formats go into a PDF in different ways. You don't have to think about this, but it explains the file size and the one place transparency gets lost.
| You drop in | What goes into the PDF | Transparency |
|---|---|---|
| JPG / JPEG | The original file, byte for byte | JPG has none |
| PNG | The original pixels, losslessly compressed | Kept |
| WebP | Re-encoded as a JPG at 92% quality | Becomes white |
| GIF | First frame, re-encoded as a JPG at 92% | Becomes white |
| BMP | Re-encoded as a JPG at 92% | Becomes white |
| HEIC / HEIF | Decoded in the browser, re-encoded as a JPG at 92% | Not kept |
JPG is the cleanest case. A PDF can hold a JPG as-is, so your photo goes in untouched: no second round of compression, no quality loss. PNG keeps every pixel and its transparent areas, which matters for logos and screenshots with rounded corners.
Everything else is converted to a JPG on the way in. That's why a transparent WebP comes out with a white background. If you need the transparency, turn it into a PNG first with the Image Format Converter, then drop the PNG in here. Converting a single WebP? The WebP to PDF page does the same thing with WebP-only wording.
HEIC needs a decoder that most browsers don't have built in, so the converter loads one only when a HEIC file is in your batch. Batches without HEIC never download it. HEIC files also show a plain label instead of a thumbnail in the list, because most browsers can't preview them.
Not on the list: TIFF, AVIF and SVG. Drop one in and it's flagged as "Not a recognized image format" and left out of the PDF. Scanned TIFFs, including multi-page ones, go through TIFF to PDF instead.
How big will the PDF be?
This is the question behind most "image to PDF 2 MB" searches. A job portal, a visa form or a school upload wants a PDF under 2 MB, or 1 MB, or 500 KB, and the photo you have is bigger than that.
The converter doesn't shrink anything on its own. It works out like this:
- JPG in, same size out. The PDF is the sum of your JPG files plus a few hundred bytes per page. We measured four JPGs totalling 2,467,835 bytes: the PDF came out at 2,469,781. That's 1,946 bytes of PDF structure for four pages.
- PNG in, roughly the same size out. PNG pixels get recompressed, so the size moves a little either way. In our tests a 52 KB PNG became a 40 KB PDF, and a 1.08 MB PNG became a 1.10 MB PDF.
- WebP, HEIC, GIF or BMP in, size changes. These are re-encoded as 92%-quality JPGs. A BMP usually gets much smaller. A WebP or HEIC can get bigger, because those formats squeeze photos harder than JPG does.
So the rule is simple: your PDF will be about as big as your images. To hit a size limit, shrink the images first.
Getting a PDF under 2 MB, 1 MB or 500 KB
- Add up your image sizes. If the total is already under the limit and they're JPGs, convert straight away.
- If not, divide the limit by the number of images. Four photos under a 2 MB cap need to be about 450 KB each, leaving a little room.
- Shrink each image to that size. The Image Compressor lowers JPG quality with a slider (75% is its default). The Image Resizer lowers the pixel count, which cuts size harder: halve the width and the height and you've kept a quarter of the pixels.
- Drop the smaller JPGs in here and convert. The PDF lands within a few KB of their total.
Already have a PDF that's too big? Compress PDF re-renders every page as a JPG. For a PDF made of photos that's a fine trade. For a document with real text it isn't, because the text stops being selectable.
Searches for "image to PDF 20 MB" usually come from the other side: a big photo that other converters refuse. Any single image up to 20 MB works here, and up to 100 MB across the batch.
A worked example: nine receipts, one 10 MB limit
You're filing expenses. You have nine receipts: four PNG screenshots of email confirmations, three JPG photos of paper receipts, and two HEIC photos of taxi receipts from an iPhone. The finance portal takes one PDF, maximum 10 MB.
- Drop all nine in at once. No converting the HEICs first, no separate tools for PNG and JPG.
- Use the arrows to put them in date order. The top file is page 1.
- Convert and download. The PNGs and JPGs land at about their own size. The two HEICs become JPGs, which may come out larger than the originals.
- If the total comes out over 10 MB, run the three JPG photos through the Image Compressor and convert again.
The whole job happens in one browser tab. Nine pictures of your card numbers and addresses never leave your computer.
Page size: why your PDF pages look huge
Each page is sized to its image, with one image pixel equal to one PDF point. A point is 1/72 of an inch. So a 1200 × 900 screenshot makes a page about 16.7 × 12.5 inches, and a 12-megapixel phone photo at 4032 × 3024 makes a page 56 × 42 inches.
On screen this looks normal, because PDF viewers zoom to fit. It shows up in two places. A viewer that opens at 100% zoom shows a corner of the photo. A printer scales the page down to the paper, which works, but only if "fit to page" is on. For comparison, US Letter is 612 × 792 points and A4 is 595 × 842 points.
The upside of image-sized pages: nothing is cropped, stretched or framed by white margins, and every pixel of the photo is still in the file.
What it doesn't do: fit images onto A4 or Letter pages, add margins, or switch orientation. If a form needs a Letter-sized page, a printer's "fit to page" setting or "print to PDF" from your system's print dialog will fit each image onto a page of that size.
Privacy: nothing is uploaded
A lot of online converters upload your photos to a server, process them there, and hand you a link. Their privacy pages then promise to delete your files after an hour, or a day. For a meme, fine. For a passport scan, a signed contract, a medical letter or a child's birth certificate, it's a real question.
This converter skips the question. The PDF is built in memory inside your browser tab and handed to you as a download. Open your browser's network tab while it runs and you'll see no image leave. Close the tab and the files are gone.
There's no paid tier either, so nothing is held back: no watermark to remove, no page cap, no "upgrade to merge more than 3 images." Microapp gives 10% of every dollar it earns to charity, off the top, audited quarterly.
Related PDF tools
- JPG to PDF, PNG to PDF and HEIC to PDF: the same job with wording for one format.
- PDF Merger: join PDFs, useful if a batch is over 100 MB and you convert it in parts.
- Rotate PDF: for the photo that came out sideways.
- Reorder PDF Pages: if you spot a page out of order after downloading.
- PDF to JPG: the reverse trip, pages back to images.
Frequently asked questions
How do I convert an image to a PDF under 2 MB?
Make the image smaller first, then convert. A JPG goes into the PDF unchanged, so the PDF ends up about the same size as the photo. Get the JPG under about 1.9 MB with the Image Compressor or Image Resizer, then drop it in here. For several images, split the limit between them.
Why does my PDF page print or open so large?
Each page matches its image at 72 pixels per inch, so a 4032 × 3024 photo makes a 56 × 42 inch page. Viewers usually zoom to fit, and printers shrink it to the paper when "fit to page" is on. Nothing is lost, the page is simply big.
Can I convert a WebP to PDF?
Yes. WebP is accepted alongside the other formats and goes in as a 92%-quality JPG. Transparent parts of a WebP turn white. The WebP to PDF page does exactly the same thing if you'd rather use a page made for it.
Does it work on a phone?
Yes, in the phone's browser. Tap the box to pick photos from your library or files. There's nothing to install. Big HEIC batches take longer on a phone than on a laptop, because the decoding happens on the device.
Does it add a watermark or a page limit?
No watermark, no page count limit and no daily cap. The only limits are file size: 20 MB per image and 100 MB per batch.
Why was one of my files skipped?
Either it's over 20 MB or it isn't one of the six accepted formats. The file stays in the list with a red note saying which, and the rest of the batch converts without it. TIFF has its own converter; for AVIF or SVG, convert to PNG or JPG first.