Files never leave your device.How it works
How to convert BMP to PDF
- 1Drop your BMP images above (or click to select).
- 2Reorder them with the ↑ / ↓ buttons — each image becomes one page.
- 3Click Convert, then download your PDF.
Frequently asked questions
- What is a BMP file?
- BMP (bitmap) is an old, uncompressed Windows image format. The files are large and many apps don't handle them well, so converting to PDF makes them easy to share, print, and open anywhere.
- Do my images get uploaded anywhere?
- No. The BMP is decoded and converted entirely in your browser — your images never leave your device.
- Will the file get smaller?
- Usually, yes. BMP is uncompressed, so each image is re-saved as a high-quality JPEG inside the PDF, which is far smaller with no visible quality loss.
Make bitmaps easy to share
BMP is an uncompressed bitmap format from the early Windows era — accurate, but bulky and awkward to send. BMP to PDF places each bitmap on its own page and bundles them into a single document you can email, print, or archive. Everything is decoded in your browser; the images never leave your device.
Order and output
Add as many BMP files as you like and arrange them with the up/down controls — the order in the list is the page order. Each image is re-encoded as a high-quality JPEG inside the PDF, so the result is a fraction of the original bitmap size with no visible loss. Transparent areas, where present, become white.
Notes and limits
Conversion runs entirely on your machine, so large bitmaps are handled without any upload. For the smallest possible PDF, run the result through Compress afterwards.
Why BMP files are so large
A BMP typically stores every pixel's color value with little or no compression, which is what made the format simple and fast for early Windows software to read and write — and also why a modest photo can weigh in at tens of megabytes. It's still produced by some scanning software, legacy engineering tools, and screen-capture utilities that default to it rather than a compressed format.
Where this shows up today
You're most likely to run into BMP files from an older scanner's default settings, a technical drawing exported from CAD or industrial software, or a screenshot taken by a tool that hasn't been updated in years. Because the format itself doesn't carry well over email or into modern apps, turning a batch into one PDF is usually the fastest way to make them usable again. If you're starting from more common formats instead, JPG to PDF and PNG to PDF cover photos and graphics respectively, and either output can be compressed further afterward if needed.