About Image to PDF
A PDF is the reliable way to send pictures that need to arrive as one document in a fixed order — scanned receipts, photographed forms, ID copies, portfolio pages. This tool places each image on its own page, at A4, US Letter or the image size itself, and builds the file in your browser. JPEGs are embedded exactly as they are, so nothing is re-compressed on the way in.
How to use
- Choose or drag in your images — JPG, PNG, WebP, GIF and BMP all work.
- Arrange the order with the arrows; each image becomes one page.
- Set the page size, orientation and margin.
- Press Convert to PDF and the document downloads to your device.
Page size, and why images look smaller than expected
A4 measures 595 by 842 points and US Letter 612 by 792, points being seventy-seconds of an inch. Your image is scaled to fit inside that page and centred, keeping its proportions, so nothing is stretched or cropped. A tall photo on a wide page leaves white bands at the sides — that is the aspect ratio being respected, not a fault.
"Match each image" picks portrait or landscape per page from the image itself, which is the setting you want for a mixed batch of phone photos. Forcing portrait or landscape is for documents that must be uniform, such as a scan pack going to a printer.
"Fit to image" skips paper sizes entirely and makes each page exactly as large as its image, treating one pixel as one point. It is ideal for screenshots and web graphics that should have no border at all, and unsuitable for anything you intend to print, where a real paper size matters.
Quality and file size
A JPEG is embedded into the PDF exactly as it exists on your disk — the same compressed data, byte for byte. There is no second round of compression and therefore no quality loss, and the PDF ends up roughly the size of the images that went into it plus a small overhead.
PNG images are re-packed into the lossless stream format PDF uses, which preserves every pixel. Formats a PDF cannot hold natively — WebP, AVIF, GIF, BMP — are converted to high-quality JPEG first, and any transparency in them is filled with white, since a printed page has no transparency to give.
If the resulting PDF is too large for an upload limit, the fix is on the image side: run the pictures through Compress Image first, then build the PDF from the smaller versions. Compressing a 4 MB phone photo to 600 KB usually makes no visible difference on paper.
Scanning with a phone
Shoot documents in even, indirect light and square to the page. A flash at an angle produces a bright hotspot that no later processing removes, and a tilted shot leaves keystoned edges that look careless on a formal submission.
Crop each photo to the sheet before converting. Cropping away a desk and a hand also removes a large share of the pixels, so the PDF gets smaller and the document reads as deliberate rather than snapped in a hurry.
Name your files in the order they should appear — 1.jpg, 2.jpg, 3.jpg — and check the numbered list before converting. Page order is the single thing recipients notice most, and it is far easier to fix here than after the file is sent.
Frequently asked questions
Does converting images to PDF reduce their quality?
JPEG images are embedded unchanged, so there is no loss at all. PNGs are stored losslessly. Only formats PDF cannot hold natively, such as WebP and BMP, are re-encoded as high-quality JPEG.
Can I combine several images into one PDF?
Yes — that is the default. Add as many images as you like, arrange them with the arrows, and each becomes one page of a single document.
Why is there white space around my image?
The image is scaled to fit the chosen page while keeping its proportions, so a shape that differs from the paper leaves margins. Choose "Fit to image" to make each page match its image exactly.
How do I make the PDF smaller?
Compress the images before converting — the PDF is essentially the size of the pictures inside it. Reducing a phone photo to around 1500 pixels wide is usually invisible in print and cuts the file dramatically.