BMP to BMP — Convert BMP Images to BMP in Your Browser

Convert BMP to BMP in Your Browser

BMP is a practical target when you want a smaller file, broader compatibility, or a format that fits a specific workflow. BMP is a legacy raster target. It is rarely the smallest option, but it is useful when an application specifically requires a Windows bitmap. Converting BMP to BMP can shrink the file, strip metadata, or make the image usable in a platform that does not accept BMP.

This converter runs entirely in your browser. Files are read with the browser's own file APIs and re-encoded on your device. Nothing is uploaded to a server, there is no account, and there is no daily cap beyond a small batch size that keeps the tab responsive.

Why Convert BMP to BMP

BMP is an uncompressed Windows bitmap format. Files are often large and unwieldy on the web, so converting BMP to a modern format usually shrinks them dramatically. There are a few common reasons to convert BMP to BMP:

• Smaller files. Re-encoding to BMP often produces a file that is a third to a half the size of the original BMP, which speeds up page loads and cuts bandwidth.
• Broader compatibility. BMP is supported by virtually every browser, email client, and design tool, so converting eliminates format friction.
• Privacy by default. Processing never leaves your device. That is useful for screenshots, invoices, or photos you would rather not send to a third-party upload service.

How to Use the Tool

The widget is a small workspace: a format row at the top, a drop area, a quality control, then Convert all and Save file.

Step 1 — Pick your format pair. The Source format and Target format dropdowns at the top of the widget set the conversion direction. The page URL updates to match, so /tools/bmp-to-bmp always shows BMP as the source and BMP as the target. You can also change the target from the Convert to dropdown on any card — it updates the global target and the URL together.

Step 2 — Add images. Use Add more or drag BMP files onto Add images. You can add more files until the queue holds ten. Each file must be 25 MB or smaller. Unsupported types are skipped with a short message: This page accepts BMP files. Switch the source format or add a matching file.

Step 3 — Review the queue. Each card shows the file name, a type badge, and the original size. Remove one image with Remove on that card. The dropzone disappears as soon as there is at least one file queued.

Step 4 — Set output quality. Output quality ranges from 10 to 100. The default of 80 is a practical starting point. Quality only affects JPG and WebP output; for PNG, BMP, and ICO the slider is visible but the encode is lossless.

Step 5 — Convert. Click Convert all. Cards show Converting… one after another, with a thin progress bar under the active card. If a file cannot be decoded, that card shows Could not read this image. and the rest of the batch still runs.

Step 6 — Download. Use Save file on a single card. Downloads are named with the target extension, for example photo.bmp becomes photo.bmp.

Worked Example

Results depend on the image, so treat these as typical ranges rather than guarantees.

A 1.2 MB BMP from a phone camera, 4000×3000 pixels, often lands somewhere between about 600 KB and 900 KB when converted to BMP at quality 80 with the original pixel dimensions kept. Fine detail (foliage, fabric) shrinks less than a smooth sky. Dropping Output quality to 60 usually cuts another large slice off the file. Look at faces and text in the preview: if you see banding or muddy edges, move the slider back up and convert again.

Limits and Format Support

This converter works with formats the browser can decode reliably on a canvas. That means no RAW, HEIC, PSD, TIFF, or EPS — those require server-side libraries and are intentionally not listed.

Source formats: JPG, PNG, WEBP, GIF (first frame only), BMP, SVG, and ICO.

Target formats: JPG, PNG, WEBP, BMP, and ICO. GIF, SVG, RAW, HEIC, PSD, and TIFF are not offered as output because the browser cannot encode them.

Animated GIFs are converted using the first frame only. SVG is rasterized to the canvas before encoding. If image/webp encoding is not supported in your browser, the card shows WebP encoding is not supported in this browser. instead of crashing.

Frequently Asked Questions

Are my images uploaded to a server? No. Files are read in the browser and re-encoded on your device. They are not sent to Quick Tools, stored in localStorage, or attached to a URL.

Why does the URL change when I switch formats? The URL always reflects the current source and target pair so you can bookmark or share a specific conversion. The queue of files stays intact when the URL changes. Can I convert between any two formats? Yes. Every combination of the seven source formats and five target formats is a valid page, including re-encodes like BMP to BMP. There are 35 pairs in total. Why is my GIF only converting one frame? Animated GIFs are decoded to a canvas, which captures only the first frame. For full animation conversion, use a dedicated GIF tool. Does conversion strip EXIF data? Yes. Location, camera model, and other metadata are not preserved, which is usually what you want before publishing a photo on the web. What does the quality number mean? It is the encoder quality from 10 (smallest, most artifacts) to 100 (largest, fewest artifacts). It is not a guaranteed file size. Two photos at quality 80 can still differ by megabytes depending on detail and noise. Can I convert more than ten images? Not in one queue. Convert and download the current batch, remove the files, then add the next set. The limit is there so a single tab stays usable.

Related Tools

Looking to shrink files without changing format? Try the Image Compressor — it re-encodes JPEG, PNG, and WebP at adjustable quality while keeping the original format.