A folder of receipts. A handful of phone-scanned contract pages. A batch of product photos that need to land in one file. Images are easy to take, hard to share as a single coherent document. Putting them into a PDF solves the share problem: one file, one predictable layout, opens the same way for everyone.
This guide covers how to convert one or many images into a PDF, the layout options worth thinking about, and the choices that affect file size.
Before you start
Two things to check:
- What's the image format? JPG and PNG are universally supported; most converters also handle WebP, HEIC (iPhone photos), TIFF, BMP, and GIF.
- How many images, and do they go together? A single image becomes a one-page PDF. Many images can either become a multi-page PDF (one per page) or be tiled multiple-per-page (good for contact sheets or receipt grids).
The steps
- Open Blackpdf's Image to PDF tool and drop your images in. Drop multiple files together to assemble a multi-page PDF in one pass.
- Reorder the images if needed — they'll appear in the PDF in the order shown in the tool. Drag thumbnails to rearrange.
- Pick your layout options (covered in detail below). The defaults (A4 portrait, one image per page, fit to contain, high quality) work for most cases.
- Click Generate PDF and download.
The options worth knowing
Page size. A4 is the default and the right pick for international sharing and printing in most of the world. Letter is the right pick if you're in the US and need standard US letter paper. Other sizes (A3, A5, etc.) exist for posters and notebooks.
Orientation. Portrait for tall content (typical documents, phone screenshots, full-body photos). Landscape for wide content (spreadsheets, panoramas, wide diagrams). If unsure, match the orientation of your images.
Images per page. Default is 1 — each image gets its own page. Multiple-per-page is useful for contact sheets (a page of product thumbnails), receipt grids (four expense receipts on one page), or any case where you want overview rather than detail.
Fit method. Contain (the default) keeps the whole image visible inside the page, with empty space at the edges if the aspect ratio doesn't match. Cover fills the page completely, cropping the image if needed. Contain is safer; cover looks more polished but loses content.
Keep aspect ratio. Almost always leave this on. The off case is specifically when you have a deliberate stretch in mind.
Quality. High preserves image detail; lower settings produce smaller files at the cost of fidelity. For documents that are mostly text-as-images (scanned receipts, screenshots of text), the quality difference is barely visible until you go to low. For photographs, the quality setting matters more.
Add page numbers. Adds a small page number footer to every page. Useful for multi-page documents (a 40-image scan needs page numbers); pointless for a one-page PDF.
Add image border. Adds a thin border around each image. Useful for contact sheets or grids; usually noise for full-page single images.
Common questions
What image formats are supported?
JPG, PNG, WebP, HEIC, TIFF, BMP, and GIF cover virtually everything. If you have a more obscure format (e.g., RAW from a DSLR), convert it to JPG or PNG in your photo software first.
Will the image quality drop?
Only if you pick a lower quality setting. At High, the image is embedded essentially at its original quality. Some image formats (notably HEIC) are converted to a more universal format inside the PDF, but the visible quality stays the same.
Can I add captions or text to the pages?
Not in a single pass through this tool. Generate the PDF first, then use the Watermark PDF tool to overlay text, or open the result in a PDF editor for richer annotations.
How big will the resulting PDF be?
Roughly the sum of the source image sizes, with light PDF overhead on top. A folder of 10 phone photos at 2 MB each becomes a PDF around 22 MB. If size matters, pick a lower quality setting on conversion, or run the result through Compress PDF afterwards.
Can I make the resulting PDF searchable?
By default, no — images carry no text data. To make the PDF searchable, run it through OCR PDF after conversion. OCR adds an invisible text layer underneath the images so search, copy, and screen readers work.
Can I combine images with an existing PDF?
Yes, in two steps. Convert your images to a PDF first, then merge that PDF with the existing one. Drag the file cards to the order you want.
Should I just print the images to PDF instead?
You can use any OS-level "Print to PDF" with image preview, but the result is one image per page with the page size set by your printer preferences, and you lose the layout options (multiple images per page, borders, page numbers, fit method). For more than two or three images, a dedicated tool produces a cleaner document.
Wrap-up
The basic flow is a one-click job once you've reordered the images: drop in, pick options, Generate PDF, download. The options that materially affect the result:
- Page size + orientation to match where the PDF will be used
- Images per page if you want a contact-sheet layout
- Quality if size matters
If you need the resulting PDF to be searchable, follow up with OCR PDF. If the result needs to land at a specific file size, compress it afterwards.