BMP to PDF
Convert BMP bitmap images into a PDF.
BMP · or drag and drop · max 50 MB each
BMP to PDF converts Windows Bitmap image files into PDF documents directly in your browser. BMP is the native raster format for Windows applications and still appears regularly in scanned documents from older equipment, exports from legacy software, screenshots taken with certain tools, and image files stored in archival systems that predate more modern formats. Converting BMP to PDF gives you a universally compatible document format that can be emailed, printed, archived, and opened on any device without requiring specialist software. iSavePDF handles the conversion entirely client-side using pdf-lib — your BMP file never leaves your device. The tool is free, requires no account, and produces output with no watermark.
Step by step
How to bmp to pdf on iSavePDF
Open BMP to PDF on iSavePDF
Navigate to isavepdf.com/bmp-to-pdf in any modern browser. Chrome, Edge, Safari, Firefox, and Brave all work on desktop and mobile. No download, extension, or login is required. The conversion tool loads directly in your browser tab.
Upload your BMP files
Drag one or more BMP files onto the upload zone, or click to open your device's file picker and select them. Each file can be up to 50 MB. You can batch-convert multiple BMP files in one go — each image will become a separate page in the output PDF. Thumbnail previews appear so you can confirm you have the right files before proceeding.
Set the page order
If you've uploaded multiple BMP files, drag the thumbnail previews to set the order in which they'll appear as pages in the PDF. The sequence shown is exactly what the output will contain — first image becomes page 1, and so on.
Convert
Click Convert. pdf-lib reads each BMP image and places it onto a PDF page sized to the image's natural dimensions. This runs in your browser's JavaScript engine with no server involvement. A single BMP file typically converts in under a second; large files or large batches take a few seconds more.
Download the PDF
A download button appears when conversion is complete. Click it to save the PDF. To confirm no upload occurred, open browser DevTools (F12), switch to the Network tab, and re-run the process — you'll see no outbound requests carrying your image data.
How it works
How BMP to PDF works
Drop your BMP files
Add .bmp bitmaps from older scanners, Windows screenshot tools, or legacy software exports.
Reorder if needed
Use up/down arrows on each thumbnail to set the page order.
Download the PDF
Each BMP is embedded losslessly as PNG inside the PDF, generated entirely in your browser.
When to use it
Common use cases
Converting scanned documents from older scanners
Many older flatbed scanners and multifunction devices default to BMP as the output format, particularly when used on Windows without additional software. Documents scanned this way — contracts, invoices, receipts, identity documents, medical forms — are often very large files because BMP uses no compression. Converting to PDF gives you a manageable, universally readable file. Because these documents often contain personal or business-sensitive information, processing them locally without a server upload is an important privacy consideration.
Archiving legacy software exports
Business applications from the 1990s and 2000s — accounting packages, document management systems, industry-specific tools — frequently exported reports and documents as BMP files. If you're migrating or archiving data from these systems, converting BMP exports to PDF creates a modern, readable format that doesn't require the original application to open. PDF is far better suited to long-term archiving than BMP because it's compressed, self-describing, and supported everywhere.
Submitting images where only PDF is accepted
Online forms, HR portals, and government submission systems typically require PDF uploads. If the file you have is a BMP — a scanned certificate, a screenshot of a system, an exported image from specialist software — converting it to PDF first is required. The local conversion means sensitive documents don't need to pass through a third-party service before you can submit them.
Reducing file sizes for storage and sharing
BMP files are uncompressed by default, which makes them extremely large relative to their visual content — a single A4 page scanned at 300 DPI as a BMP can be 20–30 MB. Converting to PDF applies compression and typically reduces the file to a fraction of that size, making it practical to email or store. For very large BMP files, consider running the output through iSavePDF's Compress PDF tool after conversion for additional size reduction.
Why iSavePDF
The privacy-first way to bmp to pdf
The standard approach for online BMP-to-PDF conversion is server-side: your file is transmitted to a remote server, processed, and the output PDF is returned. The file may be deleted after a short retention window, but it still crossed a network and was held on someone else's hardware. For BMP files containing scanned personal documents, business records, or internal system exports, that exposure is meaningful — particularly when those documents fall under data protection requirements like GDPR or HIPAA.
iSavePDF converts BMP to PDF entirely in your browser using pdf-lib. The image data never leaves your device. Your browser reads the BMP file from your local storage, pdf-lib places it onto a PDF canvas, and the finished PDF is saved directly to your downloads folder. The network is not involved in carrying your file content at any point. You can verify this with browser DevTools — open the Network tab, run a conversion, and observe that no outbound file transfer occurs. The tool is free and supported by display ads, not by processing or retaining user files.
Tips & limits
Tips for the best results
BMP files can be very large — consider compressing the output
BMP is an uncompressed format, so even simple images can be tens of megabytes. When pdf-lib places the image onto a PDF canvas, the output PDF will also be relatively large. For sharing or emailing, run the output through iSavePDF's Compress PDF tool to significantly reduce the file size without visible quality loss.
BMP supports 1-bit, 8-bit, and 24-bit colour
Most modern BMP files are 24-bit (full colour). Older or specialist BMP files may be 8-bit (256 colours) or 1-bit (black and white). The output PDF will reflect exactly what the BMP contains — if the source is a 1-bit scanned document, the PDF will be black and white. There's no colour upgrade during conversion.
Multiple BMPs become multiple pages
Uploading several BMP files creates a multi-page PDF, one page per image. This is useful for bundling a scanned multi-page document whose pages were saved as individual BMP files. Set the page order using the thumbnail drag interface before converting.
For better quality, use the original source format if available
If the content in your BMP was originally created in a vector format (e.g. exported from a CAD or drawing application), the BMP will have lower quality than the original. If you can access the original vector file and export it directly to PDF, that will produce a sharper, more compact output than BMP-to-PDF conversion.
FAQ
Frequently asked questions
- Yes — completely free with no account, no watermark on the output, and no limits on the number of files you convert. iSavePDF is funded by display advertising.