PDF to BMP Converter
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Supports: PDF
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Turn any PDF page into an uncompressed Windows Bitmap (BMP) — the raw, pixel-for-pixel format that legacy Windows apps, scientific imaging tools, and some industrial panels expect. Rendering happens at the DPI you choose (72 up to 1200), so you control the trade-off between sharpness and file size. BMP keeps every pixel at full value with no lossy artifacts, which is exactly why the output files are large.
How to Convert PDF to BMP
- Upload Your PDF File: Drag and drop your PDF onto the page, or click "Add Files" to browse. Multi-page PDFs are accepted and rendered page by page.
- Set Conversion Quality (DPI): Open Advanced Options and pick a DPI under Conversion Quality. 150 DPI suits on-screen use; 300 DPI is the print-grade default; 600+ DPI is for OCR or archival scans.
- Choose the Background Color: Under Image Transparency, the Color dropdown sets what fills transparent areas — White is the default, since BMP has no reliable transparency in most viewers.
- Convert and Download: Click Convert. Each page comes back as its own BMP. No sign-up, no watermark.
BMP vs PNG vs JPG for PDF Page Renders
| Property | BMP | PNG | JPG |
|---|---|---|---|
| Compression | None (raw pixels) | Lossless | Lossy |
| File size (A4 page) | Largest (~25 MB at 300 DPI) | Medium | Smallest |
| Quality loss | None | None | Some at low quality |
| Transparency | Not reliably supported | Yes (alpha channel) | No |
| Best for | Legacy Windows / imaging apps that need raw bitmaps | Web, sharp text, screenshots | Photos, email, small files |
If file size matters more than raw-pixel fidelity, convert PDF to PNG for lossless-but-smaller output, or PDF to JPG for the smallest files.
Frequently Asked Questions
Why is my BMP file so much larger than the PDF?
BMP stores the red, green, and blue value of every single pixel with no compression, so size scales with resolution, not page content. A US Letter or A4 page rendered at 300 DPI is roughly 24-25 MB as a 24-bit BMP, versus a few megabytes for the same page as PNG or JPG. Lowering the DPI is the most direct way to shrink the output.
Will the text in my PDF stay selectable after converting to BMP?
No. Converting to BMP rasterizes each page into a grid of pixels, so text becomes part of the image and can no longer be selected, searched, or copied. If you need searchable text, keep the PDF or run OCR on the BMP afterward; if you only need a smaller searchable image, PDF to PNG is a better fit.
What DPI should I pick for converting PDF to BMP?
Match the DPI to the end use. 72-96 DPI is fine for on-screen previews, 150 DPI is a balanced middle ground, and 300 DPI is the standard for print. Go to 400-600 DPI only when you plan to OCR small text or archive at high fidelity — each step up multiplies the uncompressed file size.
Does the BMP keep my PDF's transparency?
Not dependably. Most BMP variants are read as fully opaque by common viewers, so any transparent regions in the PDF are flattened onto a solid background. The Color dropdown under Image Transparency controls that fill color, defaulting to White. If transparency is essential, choose PDF to PNG instead, since PNG has a real alpha channel.
Is converting PDF to BMP on xconvert private?
Your file is uploaded over an encrypted connection, converted on our servers, and the result is returned for download. Uploaded files are deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public. In our testing, a single text-heavy A4 page at the 300 DPI default produced a 24-bit BMP of about 25 MB, so for large or multi-page PDFs the main practical limit is upload size and time, not the conversion itself.