You can convert image files to a PDF file online, by PDFConvert desktop software or command line program.

Supported image formats
Image Type:	Image Extended Name:
JPEG Bitmap	*.JPG; *.JPEG; *.JPE; *.GIF
TIFF Bitmap	*.TIF; *.TIFF; *.FAX; *.G3N
CompuServe Bitmap	*.GIF
PaintBrush	*.PCX
Windows Bitmap	*.BMP
Portable Network Graphics	*.PNG
DICOM Bitmap	*.DCM; *.DIC; *.DICOM; *.V2
Windows Metafile	*.WMF
Enhanced Windows Metafile	*.EMF
JPEG2000	*.JP2
Photoshop PSD	*.PSD

JPEG to PDF Converter Form
Local image File:		(*.JPG; *.JPEG; *.PNG etc.)

Use this form to upload a local JPEG or other image file and convert it to PDF file.

1. Click the "Choose File" button (different web browsers may have different button names such as "browse..."), a browse window will open, select a local image file and click the "Open" button.
It supports more than 100 image formats such as JPEG, PNG, BMP, GIF or TIFF etc. Check all supported image formats.
2. Click the "Convert Now!" button to convert. Wait a few seconds for the file conversion to finish.
3. You can download or view the output PDF file on your web browser after conversion. No email address required to receive files.

After installing PDFConvert software, click Start - Programs - PDFConvert - PDFConvert to run.

Click the "Create PDF" Toolbar, then click the "Image to PDF" button on the left.

Click on a button, then click the "Add Images" to add local image files. You can directly drag image files from file explorer and drop to list.

The image thumbnails will be shown on the list. You can select an image thumbnail file on the list and click the "Drag Up" or "Drag Down" button to adjust its position.

Download pdfconvert.exe, and run pdfconvert.exe command line program to convert image to PDF on background without windows showed.

/?

Shows all command line parameters of pdfconvert.exe.

/i

input files

For example: pdfconvert.exe /i "c:\test\1.jpg"

/o

output folder

For example: pdfconvert.exe /o "c:\pdf"

/cs 1000

convert image file to pdf file

For example: This command will convert local image files "c:\test\1.jpg" and "c:\test\2.png" to PDF file "c:\pdf\1.pdf".
pdfconvert.exe /cs 1000 /i "c:\test\1.jpg";"c:\test\2.png" /o "c:\pdf"