Step 1: Provide your PDF files using the button above or by toss and let go.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Fetch your converted BMP files.
PDF to BMP Conversion FAQ
How do I convert PDF pages to BMP images?
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Upload the PDF file and the converter renders each page as a separate BMP file. By default each page becomes its own image; the result is bundled as a ZIP archive ready for download. PDF is Adobe’s Portable Document Format from 1993, standardised as ISO 32000 and now the universal fixed-layout document. BMP is the Windows Bitmap, the raw raster format built into Windows since 1985.
How big will the BMP files be?
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Larger than you might expect, because BMP keeps every pixel exactly rather than approximating. A 1080p still lands around 2-5 MB and a 4K still around 6-15 MB, so a long extraction run adds up quickly. That is the right trade when the images feed further processing, and the wrong one when they are going straight onto a web page. BMP usually stores completely uncompressed pixel rows with a small header, which is why it is so simple to parse.
Can I convert only part of the PDF instead of all of it?
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Yes — the page-range option takes `1-5`, `1,3,5` or `all`, so a single chapter, an appendix or just the cover can be extracted without processing the rest. On a long document that is the difference between a handful of files and several hundred.
Is the PDF side of this conversion searchable?
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It depends entirely on whether real text is present. A PDF generated from a document carries an actual text layer and is searchable; a PDF built from scans or images is a picture of text and is not, until OCR adds a layer. /pdf-ocr/ does that, and it is worth running before any conversion that expects to read the words.
Do I get one image per page?
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Yes — each page renders as its own BMP file and the set arrives as a ZIP. The page-range option narrows that down when you only want a cover or a single chapter, and setting it to a single page returns one file rather than an archive.
What DPI does the BMP render at?
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Default 150 DPI (good for screen viewing and most print). The advanced options expose 72 (web thumbnail), 150 (default), 300 (print quality), 600 (high-quality archival). Higher DPI yields sharper BMP images but quadratically larger files.
Can I extract just specific pages of PDF as BMP?
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Yes — the page-range option accepts inputs like `1-5`, `1,3,5`, or `all` to pick which pages of the PDF get rendered to BMP. Useful when only a chapter or appendix of a long PDF is needed as images.
Will the BMP preserve PDF text searchability?
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No — rasterizing PDF to BMP turns text into pixels. If you need searchable output, keep the PDF as a PDF and use a text-extraction tool instead. Image output (BMP) is for visual display or further image processing.
What about transparent backgrounds in the BMP?
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PNG BMP preserves the PDF page background as transparent if the source page has no fill (rare in real-world PDF). JPG BMP cannot store transparency — pages render onto a white background. For transparent output, target PNG, TIFF, or WebP.
How long does PDF to BMP take for a 100-page document?
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About 30-90 seconds for a 100-page PDF -> BMP at 150 DPI. Higher DPI doubles or triples the time. Premium users get more parallel workers — 100 pages typically renders in under 30 seconds for them.
What is the file size of a typical BMP page?
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A 150-DPI BMP of an A4 page is 200-800 KB (PNG) or 50-150 KB (JPG quality 85). Multiply by page count to size the ZIP — a 100-page PDF to PNG bundle is typically 30-80 MB.
Can I merge all PDF pages into one tall BMP image?
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Not in the basic flow — each page becomes its own BMP. To produce a single stitched image, download the ZIP, then use /image-merge/ to vertically concatenate the per-page BMP files into one tall result.
