JPG to PDF Converter - Convert Images to One PDF Online Free

By the team at VidHaul

This JPG to PDF converter turns your photos into one PDF file, with one image on each page. Forms, offices and colleges often want documents as a PDF, but phones save pictures as JPG or HEIC. Here you add the images, set the order, choose the page size, and download a single PDF. It works as an image to PDF converter for PNG, WebP, AVIF and iPhone HEIC files too, and it can merge many JPGs into one PDF of up to 30 pages. Everything happens in your browser, on your own phone or computer, so ID cards, marksheets and bank papers are never sent to a server. Below we show exactly how the PDF is built, what each option does to the file size, measured results from our own tests, and the honest limits of the tool.

How does the JPG to PDF converter work?

For each image in the list, in order, the tool does five things:

1. Opens the image with the browser’s own decoder and turns it the right way up using the photo’s orientation tag. HEIC files open directly in Safari; in other browsers a small HEIC converter is loaded the first time, still on your device.
2. Keeps the picture of small JPGs as it is. If the image is a JPG whose longest side already fits the PDF size (1,600 pixels for Smaller file, 2,480 for Balanced, 4,000 for Best quality) and it already displays upright, its picture goes into the PDF unchanged, with no second compression. Only its photo metadata (EXIF, GPS location, camera details, XMP, IPTC, comments) is cut out first, losslessly; the colour profile is kept.
3. Otherwise redraws it: big photos are scaled down to that longest side (smaller images are never enlarged), phone photos stored sideways are turned upright, and the page image is saved as JPEG at 70% quality (Smaller file), 85% (Balanced) or 95% (Best quality). This applies to PNG, WebP, AVIF, HEIC, GIF and BMP files, big JPGs and rotated JPGs. Transparent areas become white, because JPEG has no transparency.
4. Places it on a page. With A4 or US Letter, the page turns landscape when the image is wider than it is tall, and the image is scaled to fit inside the margin and centred. With Same as photo, the page is exactly the image size, counted at 150 dots per inch.
5. Writes the PDF with the open-source pdf-lib library, as a plain PDF 1.7 file without object streams.

Worked example (measured). In our own Chrome test we made a PDF from 4 images: a 2000×3000 phone photo, a PNG, a WebP and an AVIF. The PDF was 247.9 KB with Smaller file, 472.1 KB with Balanced and 971.8 KB with Best quality. With Same as photo and Balanced, the phone photo was first scaled to 1653×2480 pixels, and at 150 dpi that gives a page of 1653 × 72 ÷ 150 = 793 by 1190 points, which is exactly the page size we measured. An 800×600 PNG got a 384×288 point page.

Second measured example: small JPGs keep their size. A 107.8 KB JPG of 600×900 pixels gave a 108.8 KB PDF, so the PDF wrapper added only about 1 KB. Our 672.9 KB 2000×3000 phone photo is stored sideways with an orientation tag, so it was redrawn upright at 1067×1600 and saved at 70%: with Smaller file the PDF was 109.2 KB.

How to convert JPG to PDF, step by step

1. Add the images. Drop them on the box, tap it to choose from your gallery or files, or copy an image and press Ctrl+V on the page. Use “Add more” for files from another folder. The limit is 30 images per PDF.
2. Check the order. The top image in the list is page 1. Each row shows the pixel size and file size, so you can spot a wrong file. Move rows with ↑ and ↓, remove one with ✕.
3. Choose the options. Page size, Margin and PDF size are explained below. If you change anything after making the PDF, simply press Make PDF again.
4. Download. After “PDF ready: N pages, size”, click Download PDF. The file is named after your first image.

Under More options there is “Copy link with these settings”, which copies a link that opens this page with the same page size, margin and PDF size, handy if you make the same kind of PDF every month.

Image to PDF converter: which files work?

Any image your browser can open works, plus iPhone HEIC:

• JPG / JPEG: photos from phones and cameras, scans from most apps.
• PNG: screenshots and logos. Transparent areas turn white in the PDF.
• WebP and AVIF: images saved from websites. If a picture “won’t open” in other apps, it is often one of these; here it just works.
• HEIC / HEIF: the iPhone’s default photo format. No need to convert it first.
• GIF and BMP: a GIF gives only its first frame, since a PDF page cannot animate.

Mixed files are fine in one PDF. In our measured test, a photo, a PNG, a WebP and an AVIF went into one 4-page PDF without any problem.

PDF size: Smaller file, Balanced or Best quality?

This is the option that matters most for uploads. It sets how many pixels and how much JPEG quality each page keeps. The table shows the settings from the code, our measured PDF sizes, and how sharp a 2000×3000 phone photo ends up on an A4 page with the Small margin.

A JPG that is already small enough for the chosen option and stands upright skips this step: it keeps its own pixels and quality, and the option only matters for the other images.

For printing at home, about 150 dpi already looks fine for photos; text documents look crisper at 200 dpi or more. So Smaller file is the right choice for almost every upload, and Best quality only pays off when someone will print the PDF or zoom into small print.

Page size and margins

You never choose portrait or landscape yourself: a wide image gets a landscape page (842×595 points on A4 in our test) and a tall or square one a portrait page (595×842). The image keeps its shape and is centred, so it is never stretched or cropped. Margin is only shown for A4 and US Letter; Same as photo has no margin.

JPG to PDF under 300 KB, 200 KB or 100 KB

Exam, job and government portals often say “upload PDF, maximum 300 KB” or “image to PDF 200 KB”. The tool has no box for an exact PDF size, because the size depends on how many pages and how much detail each page has. This method works for most forms:

1. Make the PDF with PDF size: Smaller file and read the size after “PDF ready”. In our 4-image test that was about 62 KB per page on average.
2. Still too big? Shrink each photo first with the image compressor, for example to 50 KB each with compress image to 50 KB, or to 20 KB for simple pages with compress image to 20 KB.
3. Add those compressed JPGs here and make the PDF again. A compressed JPG that fits the PDF size option and stands upright goes into the PDF without re-compression, so the PDF is about the sum of the photos plus roughly 1 KB per page (measured: a 107.8 KB JPG gave a 108.8 KB PDF; removing the photo’s metadata usually makes it slightly smaller). The compressor’s output is upright and well under 1,600 pixels for KB targets like 50 or 100, so this works with any PDF size option.
4. Leave out pages the form doesn’t ask for, such as the blank back of an ID card.

So for a 300 KB limit with 3 pages, compress each photo to about 95 KB first; for 200 KB with 2 pages, about 95 KB each; for 100 KB with one page, about 95 KB. Keep a few KB spare for the PDF wrapper. If you add the original phone photos instead, they are redrawn and their size depends on the photo: our 2000×3000 photo gave a 109.2 KB PDF with Smaller file.

Merge JPG to PDF: many images in one file

If you search “merge JPG to PDF”, this is the same thing: all images in the list go into one PDF, one per page, in the list order. You can mix portrait and landscape pages; each page turns to suit its image. To make two separate PDFs, make the first one, download it, press Clear, and start again with the second group.

Photo ko PDF kaise banaye: image to PDF on mobile, iPhone and laptop

On an Android phone

Open this page in Chrome, tap the box and choose photos from the gallery or file manager. Press Make PDF, then Download PDF. The file lands in your Downloads folder, ready to attach to a form or send on WhatsApp.

On an iPhone

Open the page in Safari, tap the box and pick images from Photos or Files. HEIC photos work as they are. After Download PDF, save it to the Files app, from where you can share or upload it.

On a laptop or PC

Open the page in Chrome, Edge, Firefox or Safari and drag the images in, or paste a screenshot with Ctrl+V. Nothing needs to be installed, which helps on office or college computers where you can’t install programs.

Can I add an image to an existing PDF, or convert PDF to JPG?

No to both, and we would rather say it clearly. This tool only goes one way: images in, a new PDF out. It does not open, edit or insert pages into a PDF you already have, and it does not turn PDF pages back into JPG images. It also does not read the text in a photo (no OCR), so the PDF holds pictures of your pages, not editable text.

Tips for a clean document PDF

• Photograph documents from straight above, in daylight, with the whole page in the frame and no shadow from your phone.
• Fill the frame with the page. The tool does not crop, so a lot of table around the paper stays in the PDF.
• If a form wants a photo with exact pixels, set them first with the image resizer.
• You don’t need to remove your location first. Before a JPG goes into the PDF unchanged, the tool removes its photo metadata (EXIF, GPS location, camera details, XMP, IPTC and comments) without touching the picture, and redrawn images never carry any. If you also want clean copies of the image files themselves, use remove EXIF data.
• iPhone photos that won’t open elsewhere can also be turned into normal JPGs with HEIC to JPG.

How accurate is the JPG to PDF converter?

The page layout is exact: page sizes, margins, orientation and centring follow the fixed numbers above every time. What varies is the file size. It depends on your images, so the same option gives a much lighter page for a plain sheet of text than for a detailed photo. A few honest limits:

• Most pages are re-saved as JPEG. Only upright JPGs that already fit the size option keep their picture without re-compression. Everything else is re-saved: even at Best quality (95%) there is a small loss, and sharp text from a PNG screenshot gets slightly soft edges at Smaller file.
• No exact size target. If you need “under 200 KB”, compress the JPGs first as shown above; then the PDF size is predictable. The tool tells you the size but does not aim for it.
• Rotated phone JPGs are redrawn. Many phone photos are stored sideways with a “turn me” tag. Those are redrawn upright (so every PDF reader shows them correctly), which re-compresses them.
• 30 images per PDF. Very large photos on an older phone can make the PDF slow to build, because each page is processed in the phone’s memory.
• Old readers and portals. We save without object streams (a newer, more compact layout inside PDFs) because some strict upload checkers and old readers reject it. The file is a little bigger than it could be, but it opens more reliably.

Why this tool is different

Most image to PDF converters online upload your files to their server, build the PDF there and send it back. This one builds the PDF inside your browser. Your images are read from your own disk, either copied in as they are (small, upright JPGs) or drawn on a canvas and saved as JPEG by the browser, and put into a PDF by pdf-lib, an open-source library that runs on the page. Nothing travels over the internet, so there is no upload wait, and ID cards or certificates never sit on someone else’s server.

The second difference is that the options are concrete. “Smaller file” is not a vague label: it means at most 1,600 pixels and 70% JPEG quality, and we tell you that so you can decide. A JPG you already compressed to a size is not compressed a second time, so its KB stay predictable. Pages turn landscape or portrait by themselves, and the PDF is saved in the plain layout that old readers and strict portals accept, a detail many converters skip.

What we measure

For each image, the tool reads its pixel width and height and its file size, and shows them in the list so you can check the order and the files. When you press Make PDF it counts the pages and measures the size of the finished PDF, and shows both.

What we do not do: we don’t measure sharpness or readability, we don’t detect or straighten document edges, we don’t read text, and we don’t compress the PDF to a size you type. No image in the PDF carries GPS or camera data: JPGs that go in unchanged have their metadata removed first (the colour profile is kept), and redrawn images carry none. The PDF’s own info lists only VidHaul as producer and creator, plus the date it was made. We also don’t collect anything about your files; the page has no way to send them anywhere.

Only convert documents and images you own or have the right to use.

Sources

• pdf-lib, the open-source library that creates the PDF and embeds the JPEG images.
• ISO 32000-1:2008 (PDF 1.7), the PDF standard, free copy published by Adobe.
• MDN: HTMLCanvasElement.toBlob(), how the browser saves each page image as JPEG with a quality setting.
• MDN: createImageBitmap(), including the option that turns photos upright from their EXIF orientation.
• MDN: Image file type and format guide (JPEG, PNG, WebP, AVIF and more).