How to Convert Images to PDF: Create PDFs from Photos and Scans

Photos on your phone, scans from the office printer, screenshots of receipts — in 2026 most "documents" start life as images. But images don't print reliably, don't compress into email-friendly files, and can't be combined with text documents. That's where converting images to PDF comes in.

The good news is it takes about thirty seconds. Here's when you should do it, how to get a clean result, and the one choice (page size) that trips people up.

Five situations where image-to-PDF saves the day

• Submitting receipts for reimbursement. Most expense systems accept PDFs, and one PDF of ten receipts beats ten JPG attachments every time.
• Sharing photo albums. A wedding or trip album as a PDF opens in any viewer, on any device, without a photo app.
• Sending scanned documents. Scans arrive as JPGs from some machines; converting them to PDF gives you a consistent, printable file.
• Building portfolios. Designers and photographers combine mockups into a single presentation-ready PDF.
• Combining screenshots. Documentation, bug reports, and tutorials become readable when screenshots are ordered pages instead of loose files.

How to convert images to PDF with SleekKitBox

1. Open the Image to PDF tool.
2. Upload one or more images — PNG, JPG, WEBP, GIF all work.
3. Drag the thumbnails to set the page order. Each image becomes one page.
4. Choose a page size (see below), click Process, and download your PDF.

Which page size should you choose?

Your images are always scaled to fit the page, so this choice mainly affects the shape of the result:

• A4 (210×297mm) — the international standard. Best default if your document will be read or printed anywhere outside the US.
• Letter (8.5×11in) — the US standard. Choose this for US-based clients, government forms, and American printers.
• A5 (148×210mm) — half of A4. Good for photo prints, flyers, and small handouts.

If every image is the same aspect ratio, the page size mostly doesn't matter — the images will fill it either way. Mixed-orientation batches (some portrait, some landscape) are where A4 or Letter gives the most predictable result.

Three mistakes to avoid

• Uploading 4K photos for a text document. A 12MP photo becomes a huge PDF. If the destination is on-screen, screenshots at normal resolution are plenty.
• Forgetting the order. Check the thumbnail order before processing — reordering after conversion means starting over.
• Skipping the quality check. After downloading, open the PDF and zoom into one image. If it looks soft, your source was the problem, not the converter.

Frequently asked questions

Can I convert a PDF back to images? Yes — the reverse tool is PDF to Image, which turns each page into a PNG or JPG at the resolution you choose.

What image formats are supported? PNG, JPG, WEBP and GIF. If you have a TIFF or BMP, convert it to PNG first in any photo editor.

Will my images lose quality? No. Images are embedded at full resolution; the page size setting only affects the layout, not the image data.

👉 Turn your images into a document: Image to PDF now →