Images to PDF
Combining multiple image files into a single PDF is a common need: scanning a multi-page paper document with a phone, bundling a series of photos for submission, or collecting screenshots into a shareable report. This tool accepts JPG, PNG, BMP, TIFF, and similar raster formats and merges them into one PDF where each image occupies one page. The original image dimensions are typically preserved, and the order of the pages follows the order you arrange the files.
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When you'd use this
- Scanning multi-page documents with a phone camera and combining them into one PDF
- Submitting a portfolio or photo set as a single PDF file
- Bundling screenshots from a testing session into a report
- Combining handwritten notes photographed on separate pages
- Sending a set of images to someone who prefers a single file
Before you convert
Sort the files before uploading
Most tools will use the order you add the files to determine page order in the PDF. Sort or name your images sequentially before uploading so the pages come out in the right order, reordering after the fact means re-converting or editing the PDF.
Match orientations to avoid mixed portrait and landscape
If some images are portrait and others are landscape, the PDF will have mixed page orientations, which looks inconsistent when printed. Rotate images to a consistent orientation before combining, or use a tool that lets you rotate individual pages in the preview.
Use PNG for graphics, JPG for photos
If you're combining a mix of screenshots (PNG) and photos (JPG), the converter will embed both formats in the PDF. The resulting file size can vary depending on how the tool handles compression. For a web-ready PDF, using JPG for all images at a slightly reduced quality will produce a much smaller file.
Common things that don't survive conversion
- Image transparency (PNG alpha channel), becomes white or black background
- EXIF rotation data, some converters ignore it, so images may appear sideways
- Very high-resolution images may be downsampled to reduce file size
- TIFF files with multiple internal layers or frames
Frequently asked questions
How many images can I combine at once?
Most online tools allow between 20 and 100 images per session, and have a combined file size limit (often 100–200 MB). For larger batches, combining in groups and then merging the resulting PDFs works well.
Will the image quality be reduced in the PDF?
Some tools compress images when embedding them to reduce file size. If fidelity matters, for a photo portfolio or a document that will be printed, look for a tool that offers "lossless" or "high quality" output, or use a desktop tool like ImageMagick.
Can I control the page size (A4, Letter) around the image?
Many tools let you choose between fitting the image to the page, setting a fixed page size like A4, or letting the page size match the image dimensions exactly. For printing, matching A4 or Letter is usually the right choice.
What happens to PNG transparency?
PDF doesn't support true transparency the same way PNG does. A transparent PNG background will typically convert to white in the PDF. If you need to preserve the appearance, place the image on the correct background colour before converting.
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Browse File Formats
Reference details for 53 file formats, extensions, MIME types, what opens each one, and how they convert.