About BMP files
BMP (bitmap) is the classic Windows image format. Microsoft Paint used it by default for many years, and some scanners, medical devices, industrial cameras and older programs still save BMP files. Most BMP files are uncompressed: every pixel is stored as it is, so a single full-screen image can take 6 to 25 MB. They are hard to email and many websites do not accept them.
A smaller, more useful file
When you convert BMP to PDF, each image is stored with lossless compression, so the quality stays exactly the same, but the file is usually much smaller than the BMP. Photographic BMP images can be made even smaller with the Image quality setting, which scales very large images down to 300, 150 or 96 DPI at the printed size.
All BMP images from a scanner or a device can go into one PDF document, one image per page, so you can archive or send them together. Choose A4 or Letter pages to print them on paper, or keep Same as image for pages that match each picture.
Tips for good results
- Name the files in the order you want, for example scan-01.bmp and scan-02.bmp, and press Sort A–Z. This saves dragging when you have many images.
- Fit whole image shows each picture complete on a paper page. Fill page covers the page from edge to edge, but parts of the image may be cut off.
- Choose small or large margins if you will print the PDF, so that no part of the image falls into the area that printers cannot reach.
- To get one PDF for each BMP file instead of one combined document, choose PDF per image under Output.
Private, in your browser
The images are processed on your own device and are not uploaded. To mix BMP with other image formats, use Image to PDF. If the images are scans of text, make them searchable afterwards with OCR PDF.