Convert BMP to PDF
Free online converter for BMP files. Fixed-layout format for sharing and printing. Nothing to install, no watermark, and every file is deleted automatically.
Drag and drop your files
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Upload a BMP file to convert it to PDF. Up to 3 files at once, 100 MB each.
Free · up to 3 files · 100 MB each · files deleted automatically after 1 hour.
About BMP and PDF
BMP .bmp
Microsoft's plain bitmap. It generally stores pixels with no compression at all, which makes it simple to read and very large on disk.
Good for
- Dead simple — every pixel stored literally
- No compression artefacts of any kind
- Reliably readable by old Windows software
Trade-offs
- Enormous files, often ten times a PNG of the same image
- Effectively unusable on the web
- Transparency support is inconsistent between readers
image/bmp
PDF .pdf
A fixed-layout page format. A PDF describes exactly where every glyph and line sits, so it looks identical everywhere — which is precisely what makes it awkward to edit.
Good for
- Identical layout on every device, screen and printer
- Embeds its own fonts, so nothing reflows or substitutes
- The accepted format for contracts, invoices and forms
Trade-offs
- Not built for editing — text is positioned, not flowing
- A scanned PDF is just images until text recognition is run
- Reflows badly on small screens
application/pdf
BMP and PDF side by side
| BMP | ||
|---|---|---|
| Compression | Uncompressed | Mixed — per object |
| Transparency | Limited — 32-bit variants only | Yes |
| Animation | No | No |
| Typically used for | Legacy Windows software, intermediate working files | Contracts, invoices, forms, anything printed |
What changes when you convert BMP to PDF
Transparency is flattened
BMP carries an alpha channel and PDF has none, so anything transparent has to become a solid colour. We composite onto white. If the image was designed to sit over a coloured background, convert to a format that keeps alpha instead — or expect a white box around it.
The image is placed, not read
Your BMP is embedded on a PDF page as a picture. Any text visible in the image stays part of the picture and is not searchable. To make it selectable, run text recognition on the resulting PDF afterwards.
Centred on a page, never enlarged
The image is placed on an A4 page by default with a 10 mm margin, scaled down to fit and centred. It is never scaled up: a small BMP stays its own size in the middle of the page rather than being stretched to fill it, because upscaling would only make it blurry. Page size, orientation and margin are all adjustable before you convert.
The PDF can be larger than the image
The picture is embedded losslessly, so nothing is degraded on the way in — but a BMP that was already efficiently compressed does not stay that size once it is stored this way, and the PDF wrapper adds its own overhead on top. Converting an image to PDF is a way of making it printable and easy to send, not a way of making it smaller.
Other BMP conversions
Other ways to get PDF
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