BMP to PNG Converter — Free & Lossless
Convert BMP images to PNG instantly — no upload, no registration. PNG's lossless compression shrinks BMP file sizes by 50–70% while preserving every pixel perfectly.
Drop files here
or click to browse · up to 20 images
How It Works
PNG's lossless compression can reduce BMP file sizes by 50–70%. You get the same image quality with a fraction of the storage space.
What is BMP and What is PNG?
BMP (Bitmap) is an uncompressed image format native to Windows. BMP files are lossless and store every pixel without compression, resulting in very large file sizes. It is required by some legacy Windows applications and hardware devices that do not support modern formats.
PNG is a lossless image format that supports full transparency (alpha channel). It preserves every pixel exactly without compression artifacts, making it perfect for logos, icons, screenshots, and graphics with text. PNG files are larger than JPG but maintain perfect quality. Learn more about PNG →
Why Convert BMP to PNG?
Convert BMP images to PNG instantly — no upload, no registration. PNG's lossless compression shrinks BMP file sizes by 50–70% while preserving every pixel perfectly.
PNG's lossless compression can reduce BMP file sizes by 50–70%. You get the same image quality with a fraction of the storage space.
Whether you're a web developer optimizing page load times, a designer preparing assets for print, or a photographer archiving images, converting BMP to PNG can make a significant difference in file size, compatibility, and quality. This free BMP to PNG converter handles the entire process in your browser — no software installation, no cloud upload, no privacy risk.
How to Convert BMP to PNG — Step by Step
Make sure BMP is selected as the source format and PNG as the output format. The tool auto-detects your file's format when you upload it.
Select Low for smallest file size, Medium (default) for a balanced result, High for excellent quality, or Lossless for pixel-perfect output with no compression artifacts.
Drag and drop up to 20 BMP images into the upload area, or click Browse to select them. You can also resize images while converting — by width, height, or exact dimensions.
Click Convert Files. Your BMP files are converted to PNG instantly. Download each file individually or grab them all as a ZIP archive.
Why Use This Free BMP to PNG Converter?
Your BMP files are processed entirely on your device using the browser's HTML5 Canvas API. Nothing is ever uploaded to a server. Your images stay private.
No waiting for uploads or server queues. The BMP to PNG conversion happens in milliseconds directly on your device.
Convert up to 20 BMP files to PNG in a single pass. Download all results as a ZIP archive with one click.
Fine-tune quality from Low to Lossless. Resize your BMP images by width, height, or exact dimensions while converting to PNG.
This BMP to PNG converter works in Chrome, Firefox, Safari, and Edge — on desktop and mobile. No app or plugin required.
Convert as many BMP files to PNG as you need. No registration, no watermarks, no file size restrictions.
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Learn More About These Formats
Want to understand the difference between BMP and PNG? Read our in-depth format guides:
BMP to PNG — Frequently Asked Questions
How do I convert BMP to PNG?
Select BMP as source and PNG as target, upload your images, pick quality, then click Convert. The BMP to PNG conversion happens instantly in your browser — no upload needed.
Is this BMP to PNG converter free?
Yes — this BMP to PNG converter is completely free. No registration, no watermarks, no file size limits. Convert as many files as you need.
Does converting BMP to PNG reduce quality?
Only if you choose a lossy quality setting. Selecting Lossless preserves full image quality with no compression artifacts. For most web use cases, High quality is indistinguishable from lossless.
Are my BMP files safe?
Your BMP files never leave your device. The entire conversion runs in your browser — nothing is uploaded, stored, or shared. This tool collects zero image data.
Can I batch convert BMP to PNG?
Yes — convert up to 20 BMP files to PNG at once. After conversion, download them individually or as a single ZIP archive.
Can I resize images when converting BMP to PNG?
Yes — enable the Resize toggle and choose By Width, By Height, or Custom. Each BMP image maintains its own aspect ratio unless you use Custom mode.
Which quality setting should I use for BMP to PNG?
Use Medium (80%) for web images, High (95%) for photos you want to preserve in detail, and Lossless for logos, screenshots, and graphics where every pixel matters.
Is this converter safe to use on sensitive images?
Yes — this BMP to PNG converter processes everything locally. Your images are never sent anywhere. It's safe for private, confidential, or sensitive image files.