How to convert BMP to Base64
- Drop your BMP files on the box above, or click it to choose them (up to 30 at once).
- Press Convert. Each file is processed on your device and shows its old and new size.
- Download the files one by one or take them all as a ZIP.
What changes when you convert BMP to Base64
- Nothing is re-encoded: the original BMP file is encoded as text exactly as it is, including any metadata it carries.
About BMP and Base64 files
BMP is the old Windows bitmap format. It stores every pixel uncompressed, so files are very large, but almost any program — including very old ones — can read it.
Base64 turns the file’s bytes into plain text, as a data URI you can paste into HTML, CSS, JSON or an email template. The original file is encoded unchanged — about a third larger as text. It is a good choice for embedding small images directly in code.
Limits
Up to 30 files of 25 MB each per batch and images up to 50 megapixels — beyond that browsers run out of memory, so the tool says so instead of producing a broken file. Files that are not images, or are damaged, are rejected with the reason.