Convert BMP to PDF

No — that is the whole reason I built this. The conversion runs in your browser using WebAssembly, so your files never leave your device; there is no server in the loop at all. It also means the tool keeps working offline once the page has loaded, and there is no file size limit beyond your device’s memory.

BMPs are typically stored with no compression at all — raw pixels on disk. Inside the PDF the same pixels are stored with lossless compression, so a 6 MB scan routinely becomes a PDF under 1 MB with zero quality change. It is the same trick as BMP to PNG, wrapped in a document.

Yes — the embedding is lossless, so every pixel of the scan is preserved, which is what matters for anything you might need to re-read or OCR later. And since the conversion runs on your device, scans of IDs, contracts and medical records never touch a server.

Not yet — each image becomes its own single-page PDF, and the zip download collects them. A multi-page combine mode is the most requested feature across my PDF tools and is genuinely on the roadmap.

File it as PDF — this is one of the rare conversions that is smaller AND more compatible AND lossless all at once. The raw BMP pixels compress on the way into the document, so a 6 MB scan becomes a sub-1 MB PDF with nothing altered, in a format every records system accepts. The BMP original keeps exactly one advantage: ancient software can still read it.

Because the image might need to stay an image. Scans headed into an editor, an OCR pipeline or a web page do better as BMP to PNG — the same lossless shrink, but the result opens in image tools rather than PDF viewers. Documents are for filing; images are for working. Pick the container that matches what happens to the file next.