Free online image tool
BMP to PNG Converter
Convert BMP bitmap images to PNG files with browser-based processing.
PNG Preview
Upload an image to start processing.
What is this tool?
BMP to PNG converts bitmap images into a modern lossless format. PNG is usually easier to use than BMP because it is broadly supported on websites, in documents, and in design tools while preserving sharp details without JPG compression artifacts.
This conversion is a good choice for screenshots, diagrams, interface captures, scanned documents, pixel art, and graphics with text. PNG may not always be as small as JPG for photos, but it keeps edges and flat colors clean, which makes it valuable for non-photo images.
Use this tool when you need a cleaner, more portable replacement for a BMP file but still want lossless output. If file size is the top priority and the image is a normal photo, BMP to JPG may be better.
How to use BMP to PNG Converter
Follow these steps to process your image locally in the browser and download the result.
- Step 1
Upload a BMP image from your device.
- Step 2
Check that the preview loads correctly.
- Step 3
Convert the BMP to PNG.
- Step 4
Download the PNG file.
- Step 5
Use the PNG in documents, websites, editors, or upload forms.
Key features
- Converts standard BMP images into PNG files.
- Keeps sharp text, edges, and flat-color graphics clean.
- Useful for screenshots, scans, icons, and diagrams.
- Lossless output compared with JPG conversion.
- No account or desktop converter required.
- Keeps the original BMP file unchanged.
Supported formats
Input is BMP when supported by the browser. Output is PNG, a lossless format that is widely supported and better suited than JPG for text and graphics.
Common use cases
- Convert an image when a website, app, form, or publishing platform rejects the original format.
- Create a more compatible copy for clients, classmates, teammates, marketplaces, or support teams.
- Prepare website assets by choosing a format that fits transparency, compatibility, or performance needs.
- Keep the original file unchanged while exporting a new version for a specific destination.
Limitations to know
- Conversion quality depends on how the browser decodes the source image and exports the target format.
- Transparency may be lost when converting to formats that do not support transparent pixels, such as JPG.
- Very large images can require more device memory and may process more slowly on phones or older computers.
- The exported file is a new browser-generated copy, so you should keep your original file if you may need to edit it again.
Privacy note
ImageToolkit is designed to handle this task in your browser whenever the selected file type is supported. The image you choose is processed on your device for preview and export, and ImageToolkit does not require an account or intentionally upload the original image to an ImageToolkit server for these browser-first tools.
Related image tools
BMP to JPG Converter
Convert BMP images to smaller JPG files directly in your browser.
convertJPG to PNG Converter
Convert JPG images to PNG directly in your browser.
convertImage to WebP Converter
Convert JPG or PNG images to modern WebP format.
resizeImage Resizer
Resize JPG, PNG, or WebP images by entering custom width and height.
Frequently Asked Questions
Is BMP to PNG lossless?+
PNG is a lossless output format. The result depends on how the browser decodes the original BMP, but PNG avoids adding JPG-style compression artifacts.
Will PNG be smaller than BMP?+
Usually yes, especially for graphics with repeated colors. However, photo-like images may still be larger than JPG.
When is PNG better than JPG?+
PNG is better for screenshots, text, icons, diagrams, and graphics that need clean edges or transparency support.
Can I convert PNG to WebP later?+
Yes. After converting BMP to PNG, you can use Image to WebP to create a smaller web-friendly version.
Why would a BMP fail to preview?+
Some BMP variants are uncommon. Browser support can vary for older bit depths or unusual encodings.