BMP to Base64 Converter
Convert BMP bitmap images to Base64 encoded strings for embedding in HTML, CSS, or JavaScript code. Perfect for creating data URIs, email embedding, and single-file applications with inline image data.
Drop your BMP image here
or click to browse files
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Complete Guide: BMP to Base64 Converter
Everything you need to know about using this tool effectively
The BMP to Base64 Converter transforms BMP bitmap files into Base64 encoded data URLs. The tool reads your BMP file, encodes the binary data into a text string you can paste directly into code. This is useful for embedding images in HTML, CSS, or JavaScript without separate file references. The tool processes everything in the browser, so your image never leaves your device.
This tool reads your BMP file, converts the raw pixel data into a Base64 string, and generates a ready-to-use data URL. BMP files are uncompressed, so the Base64 output will be very large. Consider converting to a compressed format first if the image is big.
Embed bitmap images in HTML emails
Inline Base64 BMP images in emails where external image links are blocked by email clients.
Store images in databases
Encode BMP files as text strings for storage in databases or configuration files that only accept text input.
Single-file applications
Bundle BMP images directly into HTML or JavaScript files to create self-contained applications with no external assets.
Share images as text
Paste Base64 strings into chat, forums, or code reviews where binary image files cannot be attached.
Upload an image
Drag and drop or click to browse for your BMP file.
Convert
Click Convert. The tool encodes the image into a Base64 string.
Copy or download
Copy the data URL or download it as a text file.
BMP files are uncompressed, so the Base64 output will be very large. Convert to PNG first for smaller encoded strings.
Base64 encoding increases data size by about 33 percent, compounding the already large BMP file size.
Use data URLs only for small bitmap images to keep HTML file sizes manageable.
For large images, consider linking to the file externally instead of embedding a Base64 string.
Will the image quality change?
No. Base64 encoding is a lossless text representation of the binary data. The decoded image is identical to the original BMP.
Is my image uploaded to a server?
No. All processing happens in your browser using JavaScript. The image never leaves your device.
What is the maximum file size?
The tool supports images up to 50MB. Since BMP is uncompressed, large images produce very long Base64 strings.
Can I use the data URL directly in CSS?
Yes. Paste the output into a CSS url() property. However, large BMP files will produce extremely long strings that slow down parsing.
Can I convert multiple images at once?
Yes. Upload multiple BMP files and the tool generates a Base64 string for each one.