Are my images uploaded to a server?

No. The entire conversion runs inside your browser using the HTML5 Canvas API and a JavaScript GIF encoder. Your BMP file never leaves your device.

Why does GIF only support 256 colors?

The GIF format uses an indexed color palette limited to 256 entries per frame. This makes GIF ideal for logos, icons, and flat artwork, but less suited for photographs with millions of colors.

Will the GIF look different from the original BMP?

For images with up to 256 distinct colors the output will be identical. Images with more colors will be color-quantized — you may notice slight banding in gradients or photographs. For photos, consider PNG or JPEG instead.

Does the tool support 32-bit BMP files?

Yes. The browser decodes 32-bit BMPs (including alpha channels). Note that GIF supports only 1-bit transparency (fully transparent or fully opaque), so partial alpha values will be rounded.

Is there a file size limit?

The practical limit is your browser's available memory — typically several hundred megabytes. Very large BMP files may be slow to process on low-end devices.

What if the image looks wrong after conversion?

Some non-standard BMP variants (e.g., OS/2 BMPs or exotic color depths) may not decode correctly in all browsers. If you encounter issues, open the BMP in an image editor first and re-save it as a standard 24-bit BMP.

Can I convert animated BMPs?

BMP is a static image format and does not support animation. This tool converts single-frame BMP images to single-frame GIF files.

Why is the GIF sometimes larger than the BMP?

For highly complex or photographic images with many colors, the GIF color-quantization and LZW compression may not reduce the size below the raw BMP data, particularly for small images.

BMP to GIF Converter

Name: BMP to GIF Converter
Availability: InStock
Author: Nham Vu

Upload a BMP file and download a GIF-compatible image — converted instantly in your browser with no file upload.

Upload BMP

Click or drag a BMP here

BMP files only — converted to GIF in your browser

Preview (GIF output)

Upload a BMP to see the GIF preview

Conversion happens entirely in your browser

Downloaded!

Summary

Upload a BMP file and download a GIF-compatible image — converted instantly in your browser with no file upload.

How it works

Select or drag a BMP image onto the upload area.
The browser decodes the BMP file using its built-in image decoder.
The Canvas API captures the pixel data and a GIF encoder converts it to GIF format.
A live preview and file size comparison appear immediately.
Click "Download GIF" to save the converted image to your device.

Use cases

Convert BMP screenshots, icons, or diagrams to web-compatible GIF format.
Shrink large uncompressed BMP files from Windows Paint or legacy software.
Prepare BMP graphics for email clients and older web platforms that favor GIF.
Convert BMP exports from CAD or industrial tools for sharing online.
Archive bitmap images in the widely-supported GIF format.
Process images privately without uploading to any third-party service.
Replace bulky BMP files with compact GIFs for logos and flat artwork.
Create GIF images from BMP source files for use in web design workflows.

Frequently Asked Questions

Related tools

Bmp To Png Image Bmp To Jpg Image Gif To Bmp Image Gif To Png Image Compressor

Last updated: 2026-05-29 · Reviewed by Nham Vu