Convert S/MIME to BMP
Convert S/MIME to BMP online: the signed email laid out with its headers and body, saved as an uncompressed BMP bitmap. Free, no sign-up.
Drop your S/MIME files here
Up to 50MB per file.
Conversion Settings
Files are encrypted and auto-deleted after conversion
How to Convert
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Upload your S/MIME files
Drag and drop or select S/MIME files from your device. You can upload multiple files at once.
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Configure Output
Choose any available BMP output options, then start the conversion.
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Download BMP files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert S/MIME to BMP?
S/MIME files hold an email secured with a digital signature or certificate, as sent by Outlook, Apple Mail and other clients that use S/MIME. The image shows the From, To, Cc, Subject and Date of the message, its body, and a list of attached parts by name and type.
BMP stores every pixel uncompressed, so the image is exact and simple to read by any software that handles Windows bitmaps.
Frequently Asked Questions
How do I convert S/MIME to BMP?
Drop your S/MIME file above and press Convert. Our servers read the signed message, lay out its headers and body, and render the page. The result is saved as an uncompressed BMP bitmap, ready to download.
Can a signed S/MIME email be converted to BMP without the sender's certificate?
Yes. The message is read as it was received, so its headers and body are laid out with no certificate or key needed.
Are the Cc recipients of an S/MIME email included in the BMP?
Yes. When the message was copied to others, a Cc row lists them beneath the From and To rows in the header table.
What happens when a S/MIME file fills several BMP pages?
Each page is rendered at 144 dpi and saved as its own BMP image, named page-1, page-2 and so on, and they download together as one ZIP. A single page downloads as one BMP file.
What kind of BMP does the S/MIME converter create?
A standard Windows bitmap with every pixel stored uncompressed, so the image is an exact copy of the rendered result.
Is my .smime file kept private?
Your file is uploaded over an encrypted connection, converted on our servers and deleted automatically within 24 hours. We never read, share or keep your files, and no account is needed.