Turn Windows Bitmap .BMP images into a clean, shareable PDF directly in your browser. Add one BMP or combine multiple bitmap files into a multi-page PDF with page size, orientation, margin and fit controls.
Select one or more .bmp files, choose how each bitmap should fit on the PDF page, and download a single PDF document. The conversion workflow runs in your browser.
Drag & Drop BMP files here
or click to choose one or multiple bitmap images from your device
✅ .BMP · Multiple Files SupportedA practical bitmap-to-document workflow for scans, screenshots, legacy graphics and image collections that need to be shared, printed, submitted or archived as PDF.
Create a PDF from bitmap images without installing desktop software.
BMP, commonly called Windows Bitmap or Device-Independent Bitmap, is a raster image format historically associated with Microsoft Windows.
A BMP file stores an image as a grid of pixels. Microsoft documents the Windows bitmap format as a file structure containing a bitmap file header, bitmap information header, optional color table and bitmap pixel data. Depending on the variant, the header can describe dimensions, bits per pixel, compression and other image properties. See Microsoft's Bitmap Storage documentation and BMP format overview for technical details.
The Library of Congress describes BMP as a raster graphics format designed to store bitmap digital images independently of a display device. Because BMP can preserve straightforward pixel data with little or no compression, files may be significantly larger than JPEG, WebP or highly optimized PNG images containing similar visual information. Its simplicity and long history are reasons BMP still appears in older Windows software, exported diagrams, screenshots, scanning workflows and legacy archives.
PDF is usually more convenient when the image needs to behave like a document. A PDF can contain multiple pages, keeps a defined physical page size, works well with print and document submission workflows, and is widely supported by desktop and mobile viewers. Converting BMP to PDF does not transform the source into vector artwork; it places the raster bitmap image onto a PDF page.
BMP and PDF solve different problems, so converting is most useful when the image needs a document-oriented delivery format.
| Feature | BMP | |
|---|---|---|
| Primary role | Raster image storage | Portable document delivery |
| Multiple pages | No | Yes |
| Pixel-based image | Native | Can embed raster images |
| Defined paper size | Not a document page | Yes |
| Good for forms/submission portals | Sometimes rejected | Commonly accepted |
| Image editing master | Raster-only | Usually delivery copy |
| Print sequence of many images | Separate files | One multi-page document |
The source remains raster, so perceived quality depends mainly on original pixel dimensions, page scaling and the image encoding used inside the PDF.
A 3000 × 2000 pixel BMP contains far more visual detail than a 600 × 400 pixel BMP. When both are placed on the same A4 page, the larger source generally has more pixels available for printing or zooming. Converting the smaller image to PDF cannot invent missing detail.
The Fit Inside Page setting keeps the whole image visible and preserves its aspect ratio. Empty page space may remain around the image, especially when its shape is very different from A4 or Letter. Fill Page also preserves aspect ratio but can crop edges. Stretch uses all available space but can distort the image.
PDF generation libraries usually embed JPEG or PNG-compatible image data rather than raw BMP structures. This tool decodes each bitmap into a browser canvas and then creates an image stream for the PDF. The quality selector controls JPEG encoding quality; it does not change the original BMP stored on your device.
Modern browsers expose image decoding capabilities through APIs such as createImageBitmap(). This converter also implements a basic BMP parser for common uncompressed 24-bit and 32-bit files when direct browser decoding is unavailable.
BMP to PDF conversion is useful when images need to move into a document workflow rather than remain separate bitmap files.
Choose settings based on whether your priority is printing, preserving image proportions, filling a page or reducing output size.
| Goal | Page Size | Orientation | Image Fit | Quality |
|---|---|---|---|---|
| General document | A4 or Letter | Auto | Fit Inside | High |
| Print full image without crop | A4 / Letter | Auto | Fit Inside | Maximum |
| Full-page visual | A4 / Letter | Auto | Fill Page | High |
| Keep image proportions as page | Fit to Image | Automatic | Fit Inside | High |
| Email smaller PDF | A4 / Letter | Auto | Fit Inside | Balanced / Smaller |
Most standard Windows bitmap files work, but BMP is an old family of formats with several headers, color depths and compression modes.
A renamed image can end in .bmp without containing a valid Windows Bitmap structure. Open and resave it as BMP in an image editor.
Legacy RLE, bitfield or specialized BMP variants may not be handled consistently by every browser. Resave as a standard 24-bit RGB BMP and try again.
Very large pixel dimensions require substantial browser memory because the image must be decoded before it can be inserted into the PDF.
Use Fit Inside Page or Fill Page instead of Stretch. Stretch intentionally ignores the original aspect ratio.
Choose Balanced or Smaller PDF quality. For a multi-page document, the combined pixel count of all source files strongly affects output size.
Reduce the page margin or use Fill Page. Be aware that Fill Page can crop content along one dimension.
Screenshots, scans and legacy bitmap files can contain private material, so the conversion workflow is designed to operate locally.
The page reads the files you choose with browser APIs, decodes them into local canvas data and creates the PDF in device memory. The generated file is downloaded from a temporary browser object rather than requiring an upload to a conversion server.
Important details about raster resolution, page sizes, printing, color, file size and multi-image PDF workflows.
Converting a bitmap to PDF changes how the image is packaged and delivered, not the fundamental nature of the artwork. The pixels remain pixels. This is different from converting a native vector drawing into PDF where paths and text may remain vector objects.
BMP dimensions are measured in pixels, while PDF page dimensions are expressed in physical units such as points, inches or millimetres. The converter scales the raster image to fit the selected page rectangle. A large, high-resolution bitmap can be reduced to fit without losing composition, but enlarging a small bitmap can make individual pixels more noticeable.
A4 is widely used internationally, while US Letter is common in the United States and some related workflows. If the PDF will be printed, choose the paper size expected by the destination printer or organization. If physical paper size does not matter and you simply want each page to follow the bitmap's proportions, choose Fit Page to Image.
Auto orientation uses the source image shape to select portrait or landscape for standard paper sizes. This is useful when one PDF contains a mixture of tall scans and wide screenshots. You can force all pages to one orientation when a consistent document layout is more important.
Often, but not always. Uncompressed BMP files can be large, while the PDF produced here can store each raster page using JPEG compression. The resulting PDF may therefore be much smaller than the sum of the source BMP files. However, detailed or noisy images at high quality can still produce large PDFs, especially when many pages are combined.
Classic 24-bit BMP has no alpha transparency channel. Some 32-bit BMP variants can carry alpha-related data, but legacy handling is inconsistent. This converter renders images onto an opaque white or light gray background before PDF creation, giving predictable document pages.
This tool creates image-based PDF pages. It does not perform OCR, so text visible inside a screenshot or scan does not automatically become searchable or selectable. For scanned documents that need searchable text, use an OCR workflow after or instead of basic image-to-PDF conversion.
Answers to common questions about converting bitmap images to PDF, quality, multiple files, page sizing, privacy and browser compatibility.
Add one bitmap or combine multiple BMP files, choose your preferred page settings, and download a clean PDF directly from your browser.
🖼️ Open BMP to PDF Converter ↑