BMP to PDF
Convert BMP bitmap images to PDF.
or click to browse — supports PDF files up to 25MB
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How to use
- 1 Drop or click to upload your file
- 2 Adjust options if shown
- 3 Click BMP to PDF
- 4 Download your result instantly
- ✓ Files up to 1 GB
- ✓ Unlimited jobs/hour
- ✓ Batch processing (up to 100 files)
- ✓ Priority support
Files are processed securely and deleted within 1 hour. Files are processed automatically. No human reviews your documents, and PDFRun does not use them to train models.
Why this works
Convert legacy BMP bitmap images into PDF — useful when older systems, scanners, or specialised software output BMPs you need to share in a modern format.
BMP (Windows Bitmap) is one of the oldest image formats still in active use. You’ll mostly encounter it from: older Windows scanners and capture devices that default to BMP output, legacy industrial software that exports BMP for compatibility, government and archival systems where BMP was specified decades ago and the spec never updated, and Microsoft Paint’s default save format on older Windows versions.
BMP files are large — they’re essentially uncompressed pixel data — and they’re not universally readable on modern macOS or mobile devices. Converting to PDF makes the content portable: any device with a PDF reader can open it. Each BMP becomes a page in the output PDF, in the order you upload them.
Quality is preserved because BMP is lossless to start with — there’s no compression artefact to inherit. The PDF’s embedded image is a faithful copy of the original BMP’s pixel data. File size is roughly the source BMP size plus a small PDF overhead per page; expect the output to be substantially larger than a JPG-to-PDF or even PNG-to-PDF of the same content. Run through Compress afterwards if the output is unwieldy.
If your goal is just to share the image content broadly (email, web, mobile), consider converting the BMPs to PNG or JPG first using a desktop image editor, then using PNG to PDF or JPG to PDF. PNG keeps the lossless quality at smaller files; JPG is even smaller if the content is photographic. We accept BMP directly here because sometimes that intermediate step isn’t convenient — e.g. when you’re working entirely in a browser with a folder of BMPs from a scanner.
How it works
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1Upload your BMP filesDrop one or more BMP files into the upload box. Drag to set the page order in the output PDF.
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2Run the conversionPress Convert. Most BMPs convert in 2–4 seconds; very large ones can take a touch longer because BMP file sizes can be substantial.
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3Download the PDFYou’ll get one PDF with each BMP as its own page, at full original quality.
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4Optional: compress for distributionBMP-based PDFs are often large. If you’ll be emailing or uploading the output, run it through Compress first.
Real-world uses
Archival staff
Legacy scanner output stored as BMP needs to be packaged for modern distribution.
Industrial QA
Inspection cameras still saving in BMP need their captures bundled into shareable PDFs.
Government workflows
Specifications written decades ago that mandated BMP output now need PDF re-distribution.
Researchers
Older scientific imaging tools that export BMP — wrap a session’s outputs into one PDF for the lab notebook.
Common questions
Why is BMP still in use?
BMP persists in legacy environments: older Windows scanners, industrial control software, government archival systems, and some specialised imaging workflows that standardised on it decades ago. It’s lossless and universally readable on Windows but rare elsewhere.
Will quality drop in the conversion?
No. BMP is already lossless; the conversion embeds the pixel data into the PDF without re-encoding. The PDF page is bit-identical to the BMP.
Why is the resulting PDF so big?
BMP is essentially uncompressed pixel data — a single high-resolution BMP can be 10+ MB. The PDF inherits that size. Run the output through Compress; the Recommended setting cuts file size dramatically with no visible quality loss on screen.
Should I convert BMPs to PNG or JPG first?
If you have the time and a desktop image editor handy, yes — PNG keeps the lossless quality at smaller files, JPG is smaller still for photographic content. We accept BMP directly because that intermediate step often isn’t convenient when you have a folder of scanner outputs in a browser.
Will the order of my BMPs matter?
Yes — the upload order is the page order in the output PDF. Drag files in the upload box before pressing Convert to set the sequence.
Does it work with .DIB (Device Independent Bitmap)?
Yes. DIB is the format BMP wraps internally; we accept .dib files the same way we accept .bmp.