Files never leave your device.How it works
How to convert PDF to BMP
- 1Drop your PDF above (or click to select).
- 2Choose a resolution (150 DPI is a good default).
- 3Click Convert, then download the images — all pages at once as a .zip.
Frequently asked questions
- Do my files get uploaded?
- No. Rendering happens entirely in your browser — your PDF never leaves your device.
- Why BMP?
- BMP is an uncompressed bitmap that some legacy or Windows apps require. The files are large; for sharing, JPG or PNG are usually better.
- Which resolution should I pick?
- 150 DPI suits most uses. Choose 300 DPI for print, or 72 DPI for small screen images. Higher DPI makes much larger BMP files.
Uncompressed page bitmaps
Some Windows and legacy tools only accept BMP. PDF to BMP renders each page of your file to a 24-bit uncompressed bitmap right in the browser, then hands them all back — individually or as one ZIP for the whole document.
About the format
BMP stores every pixel with no compression, so the files are large but exact. If you only need the images to share or view, JPG or PNG will be far smaller. Pick the DPI to match your use — higher means more detail and much bigger files.
Notes and limits
Rendering runs in a background worker, so even a long PDF won't freeze the tab. Password-protected PDFs must be unlocked first. Everything is rendered locally, so nothing is uploaded.
Why some systems still insist on BMP
BMP predates most modern compressed formats and is baked into Windows at a low level — GDI, older device drivers, and industrial or embedded software often expect it because it requires no decoding step: the pixel data is simply read in a predictable, fixed layout. That makes it a common requirement for legacy manufacturing software, some label and receipt printers, older CAD or GIS tools, and internal enterprise systems that were never updated to handle compressed images.
Doing the size math before you convert
An uncompressed 24-bit bitmap uses roughly 3 bytes per pixel before any file-level compression, so a single letter-size page at 300 DPI can run to tens of megabytes, and a multi-page document quickly adds up to a very large ZIP. If you're not sure the receiving system truly requires BMP, it's worth checking first — most software that claims to "need BMP" will actually accept PNG just as well.
A practical middle ground
If file size is a concern but you still need a specific legacy format, consider whether PDF to TIFF is accepted instead — TIFF supports lossless compression and is recognized by most of the same older document and imaging systems, at a fraction of the file size of BMP.
Converting back
To turn a set of BMP page images back into one PDF, use BMP to PDF — each bitmap becomes a page in the order you provide them.