pdfpix

Turn BMP images into a PDF

or drop them here
Choose at least one JPG or PNG image first.

Choose BMP images, put them in order, and build one checked PDF without an upload. The browser decodes common bitmap formats into lossless pixels and preserves their dimensions. Match each page to its image or use A4 or US Letter with the margin you choose. The finished page count, page sizes and embedded image dimensions are verified before download.

How to turn BMP images into a PDF

  1. Choose BMP images

    Choose one or more .bmp files, or drop them on the page. Each bitmap is decoded in this tab.

  2. Order the bitmaps

    A BMP has no orientation tag and no capture date, so the list shows them in the order you added them. Move or remove rows until the pages read correctly.

  3. Set the page shape

    Keep the bitmap's own proportions at 96 pixels per inch, or place each one on A4 or US Letter. A margin of 0.25 or 0.5 inch is optional.

  4. Confirm and download

    After the build, the PDF is read back. The page count must match your list and each page image must keep the bitmap's width and height.

What goes into the PDF

Each BMP is decoded in memory and written into the PDF as a lossless PNG image. This keeps its pixel width and height, and keeps transparency when the bitmap carries a usable alpha channel. It does not keep the BMP byte stream, and it does not add OCR or selectable text.

Where BMP to PDF fits

pdfpix is a free BMP to PDF converter with no account needed and no daily cap. The page is online, but the convert step is not: the bitmap is decoded and written into the PDF inside this browser tab, so the file never reaches a server and nothing waits behind other people in a queue.

BMP stores raw pixels with no compression, so a handful of bitmaps can be larger than the document they came from. Each one is written into the PDF as a lossless image, which usually shrinks the file without changing a pixel. A bitmap carries no orientation tag either, so pages appear in the order you set here and nothing is rotated behind your back. If the result is still too large to email, Compress PDF reduces the image data without turning the page into a flat picture.

To place these pages next to documents you already have, use Merge PDF. To reorder or drop pages afterwards, use Organize pages. If the files are photos or scans rather than bitmaps, Images to PDF takes several formats in one job, and Combine images into one PDF walks through the ordering and paper choices.

Questions

Are my BMP files uploaded?
No. The BMP decoder, PDF writer and output checks run in this browser tab.
Which BMP files does it support?
It reads common Windows and OS/2 bitmap files with 1, 4, 8, 16, 24 or 32 bits per pixel. It also reads standard RLE and bitfield compression.
Does it change image quality?
No pixels are resampled. Each BMP is decoded once and stored as a lossless PNG image inside the PDF. Its pixel width and height are kept.
Why can the PDF be much smaller than the BMP files?
Many BMP files store pixels with little or no compression. The PDF stores those decoded pixels with lossless PNG compression, which often takes fewer bytes.
Does it make text selectable?
No. BMP contains pixels, not selectable characters. This conversion does not run OCR.
Is there a size limit?
A single bitmap may hold up to 80,000,000 pixels, about 9,000 by 9,000. A larger one is refused with a message instead of stalling the tab.

Related tools

Each runs in a browser tab like this one, reads its own output back before the download, and needs no account. The footer links every tool.

Where to go next