BMP to PDF Converter
Combine BMP scans and screenshots into a PDF — embedded losslessly (usually much smaller than the BMPs) or as JPEG, on A4, Letter or image-sized pages.
BMP to PDF Converter
🔒 Your PDF is processed entirely in this browser tab (pdf-lib + Mozilla pdf.js) — it is never uploaded, so confidential documents stay on your device.
- BMPUsually none (RLE4/RLE8 optional) · 1, 4, 8, 16, 24 or 32 bits per pixel · alpha: Only 32-bit with V4/V5 headers; support varies
- PDFImages as JPEG (DCT) or lossless Flate · Any (per embedded image) · alpha: Soft masks
- TipScanned text? Keep quality on Lossless so letters stay crisp.
- PrivacyFiles never leave your device; re-encoding drops EXIF/GPS metadata.
Format facts checked October 2026.
Runs in your browser — nothing you enter is uploaded or stored.
Scratchpad auto-saved
How it works — in four simple steps
No signup and nothing to install — it all runs in your browser.
Add your BMP files
Drop them on the box or click to choose.
Arrange the pages
Drag to reorder, or remove pages you don't need.
Pick page size and quality
A4, Letter or fit-to-image; Auto keeps graphics lossless and compresses photos.
Create the PDF
Press Create PDF and download it — assembled entirely in your browser.
Scanned text? Keep quality on Lossless so letters stay crisp.
Features
One PDF from many images
Drag to reorder, A4/Letter/fit-to-image pages, margins, lossless or JPEG embedding.
Nothing uploaded
Decoding and encoding run in your browser tab; the files never leave your device.
About the BMP to PDF Converter
BMPs come from older scanners, Windows tools and machines, and they're bulky and awkward to share. A PDF bundles them into one compressed, universally readable document.
The BMP is decoded by your browser, which reads 1- to 32-bit bitmaps.
The PDF is assembled in your browser with pdf-lib. On Auto, each page is checked: graphics, screenshots and scans with few colours are embedded losslessly (Flate), photographs as JPEG — so text stays sharp without bloating the file.
BMP vs PDF compared
| Property | BMP | |
|---|---|---|
| Origin / standard | Microsoft Windows / OS/2 (1980s) | Adobe, 1993 · ISO 32000-2 (PDF 2.0, 2020) |
| Compression | Usually none (RLE4/RLE8 optional) | Images as JPEG (DCT) or lossless Flate |
| Transparency | Only 32-bit with V4/V5 headers; support varies | Soft masks |
| Colour depth | 1, 4, 8, 16, 24 or 32 bits per pixel | Any (per embedded image) |
| Animation / pages | No | Multi-page |
| Maximum size | Signed 32-bit width/height (memory-bound) | 14,400 × 14,400 pt page (PDF 1.x guidance) |
| Typical use | Windows apps, embedded displays, machine tools | Documents, printing, sharing |
| Opens in | Every Windows program, browsers, most editors | Everything |
Measured on our sample
What this page produced from its built-in sample (a 960 × 640 BMP), with each preset:
| Setting | Input | Output | Notes |
|---|---|---|---|
| Default (A4, Auto quality) | 450.1 KB · 1 page(s) | 65.7 KB | 1 page · 1 lossless |
Measured with this page’s converter in Chromium (October 2026). Press the sample preset above to reproduce; your own images will differ with their content.
Things to know
- Very large BMPs. Scans at 600 DPI can be 100+ MB each; choose a JPEG quality to keep the PDF manageable.
- 1-bit BMPs. Black-and-white BMPs embed very efficiently losslessly — don't switch them to JPEG.