PNG To BMP Converter
Convert your PNG images to BMP format.
Drag & Drop PNG files here
or
Import a PNG image directly from a public URL, Google Drive, or Dropbox.
Max file size: 100MB
ℹ️ BMP files are uncompressed, so output size may be significantly larger.
Your images are processed securely. No files are uploaded or stored on our servers.
Convert PNG to BMP (Bitmap) online and get uncompressed, pixel-accurate image output for legacy software, system-level graphics, technical workflows, and Windows applications that require raw bitmap data. BMP stores every pixel without any compression - ensuring exact pixel values are preserved for scenarios where compression-free fidelity matters more than file size.
BMP files are significantly larger than PNG because they store raw pixel data without compression. If you need smaller files, keep your PNG or convert to JPG for lossy compression or WebP for modern web optimization. Note that PNG transparency is lost during BMP conversion - transparent areas become white. Browse our complete image tools suite for all format options.
Zero Compression
BMP stores every pixel as raw data - no compression artifacts, no quality loss. True pixel-perfect uncompressed output.
100% Private
No uploads, no servers. All conversion happens locally in your browser. Your images never leave your device.
Batch Convert
Convert multiple PNG images to BMP at once. Download individually or grab everything as a single ZIP archive.
Legacy Compatible
BMP works with every Windows application, legacy system, embedded device, and scientific tool ever made.
How It Works
Convert your PNG images to uncompressed BMP in 4 simple steps. No software, no sign-up required.
Upload Your Images
Click to select or drag and drop your PNG files. Import from URL, Google Drive, or Dropbox.
Choose Settings
Set output dimensions if needed. BMP output is always uncompressed 24-bit color - no quality options to configure.
Convert to BMP
PNG is decoded and re-encoded as raw BMP pixel data - transparency flattened to white, all locally in your browser.
Download BMP Files
Download each BMP individually or grab all as a ZIP. Ready for legacy systems, editing, and technical use.
Lossless to Uncompressed
Move your cursor to compare. BMP stores raw pixel data without any compression - the visual output is identical to the PNG source, just in an uncompressed format for maximum software compatibility.
BMP files are larger than PNG because they store raw, uncompressed pixel data - while PNG uses lossless Deflate compression. Both preserve identical pixel quality, but BMP's raw format is required by legacy Windows software, embedded systems, and scientific tools that don't support PNG's compression. Transparency is lost - transparent PNG areas become white in BMP.
Convert PNG to BMP Online - Uncompressed Bitmap Output
Convert your PNG (Portable Network Graphics) images to BMP (Bitmap) format - Microsoft's uncompressed raster image standard. BMP stores every pixel as raw data with zero compression, making it essential for legacy Windows software, embedded systems, scientific imaging, and technical workflows that require unaltered pixel values. For smaller files, keep PNG or convert to JPG or WebP. For professional printing, try TIFF. This tool runs in your browser - free, instant, and private.
⚖️ PNG vs BMP - Quick Comparison
| Feature | PNG | BMP (Bitmap) |
|---|---|---|
| Compression | Lossless (Deflate) | ✓ None (raw pixels) |
| File Size | Smaller (compressed) | Much larger (uncompressed) |
| Transparency | ✓ Alpha channel | ✗ No (24-bit standard) |
| Quality | Pixel-perfect | ✓ Pixel-perfect |
| Web Support | ✓ Universal | ✗ Not recommended |
| Legacy Support | Good (modern) | ✓ Excellent (all Windows) |
| Best For | Web graphics, icons | Legacy software, system graphics |
PNG uses lossless compression - preserving every pixel at much smaller file sizes than BMP. BMP stores raw uncompressed pixels - identical quality but 3–5× larger files. Both formats preserve pixel-perfect quality, but BMP lacks PNG's compression and transparency. The only reason to convert PNG to BMP is when software specifically requires uncompressed BMP input - legacy Windows applications, embedded systems, scientific imaging tools, and industrial control software. For everything else, PNG is strictly superior. Note: PNG transparency is lost during conversion - transparent areas become solid white in BMP.
🎯 When to Convert PNG to BMP
BMP is only the right choice when specific software or hardware requires uncompressed bitmap input:
Legacy Windows Software
Older Windows applications, industrial control panels, and embedded system interfaces were built before PNG existed and only accept BMP. Converting PNG graphics to BMP ensures compatibility with these legacy systems without requiring software updates or patches.
Scientific & Medical Imaging
Research tools, microscopy software, and medical imaging systems often require BMP because scientific analysis needs exact pixel values without any compression - even lossless PNG compression is sometimes rejected by tools that expect raw, unprocessed pixel arrays in memory.
Print & Prepress Workflows
Some older prepress software and large-format printers require uncompressed BMP input for guaranteed fidelity. While modern systems accept PNG and TIFF, legacy print equipment may specifically need BMP format for reliable output.
Embedded Systems & Hardware
Microcontrollers, PLC displays, digital signage hardware, and custom electronics often read BMP directly because the raw pixel format maps directly to frame buffer memory - no decompression step needed, which matters in resource-constrained environments.
For web images, use PNG to WebP for smaller files. For sharing, PNG to JPG is more practical.
🖼️ When to Keep PNG Instead
PNG is superior to BMP in nearly every scenario. Keep PNG for:
Websites & Web Apps
BMP files are far too large for web use. A single image could be 5–15 MB. PNG offers the same pixel-perfect quality at 3–5× smaller files with transparency support. Or use WebP for even smaller web delivery.
Images Needing Transparency
BMP doesn't support transparency. If your PNG has transparent areas (logos, cutouts, overlays), those become solid white in BMP. Keep PNG for transparency, or use WebP which supports both transparency and better compression.
Email & Social Sharing
BMP files are impractically large for email or messaging. Keep PNG for transparent graphics or convert to JPG for dramatic size reduction. No one should ever email a BMP file.
General Storage
Storing images as BMP wastes 3–5× more disk space than PNG with zero quality benefit. PNG's lossless compression gives identical quality at much smaller sizes. Only use BMP when software explicitly requires it.
💎 Key Benefits of BMP Format
Zero Compression
BMP stores raw pixel data without any compression algorithm. Every pixel value is stored exactly as-is - no encoding, no transformation, no decompression needed. This is essential for software that reads pixel data directly from the file into memory.
Predictable File Sizes
BMP file size is mathematically exact: width × height × 3 bytes (24-bit) + 54 bytes header. A 1920×1080 image is always 6,220,854 bytes. This predictability is valuable for buffer allocation in embedded software and real-time systems.
Maximum Compatibility
BMP is recognized by every Windows application ever made - from Windows 3.1 to Windows 11. MS Paint, Photoshop, GIMP, legacy industrial software, embedded systems, and scientific tools all support BMP without any library dependencies.
Instant Read/Write
Because BMP is uncompressed, reading and writing are extremely fast - no CPU-intensive decompression is needed. The pixel data maps directly to memory. For real-time image processing in embedded and scientific contexts, this matters.
⚙️ Features of This Tool
- ✓ Convert single or multiple PNG files to BMP at once
- ✓ Uncompressed 24-bit BMP output - true pixel-perfect fidelity
- ✓ Transparency flattened to white background
- ✓ Browser-based conversion using
CanvasAPI - no server uploads - ✓ Batch ZIP download: all converted BMP files in one archive
- ✓ Custom resize options: percentage, exact dimensions, or presets
- ✓ Compatible with all Windows versions, Photoshop, GIMP, Paint
- ✓ Import via
Computer,URL,Google Drive, orDropbox - ✓ Mobile-responsive: works on phones, tablets, and desktops
- ✓ 100% client-side: zero data stored, complete privacy
📋 How to Use (Step-by-Step)
- Select your imagesClick "Select File" or drag PNG files into the drop zone. Import from
URL,Google Drive, orDropbox. - Choose settingsSet resize dimensions if needed. BMP output is always uncompressed 24-bit - no quality options because there's no compression to configure.
- Convert to BMPClick "Convert Images". PNG transparency is flattened to white, then the image is stored as raw BMP pixels - locally in your browser. Expect larger files.
- Download your filesDownload each BMP individually or click "Download All (ZIP)". BMP archives can be large - ensure sufficient storage.
🔧 Technical Notes (What to Expect)
BMP stores 3 bytes per pixel (24-bit RGB). A 1920×1080 PNG produces a ~5.9 MB BMP file regardless of image content. A 4K image becomes ~24 MB. PNG's lossless compression typically stores the same data at 3–5× smaller sizes. The BMP size increase is the trade-off for compression-free, raw pixel access.
Standard 24-bit BMP does not support alpha transparency. When converting a PNG with transparent areas, the transparency is composited against a solid white background. If your PNG has a transparent background around a subject, the BMP will show a white rectangle. To preserve transparency, keep PNG or convert to WebP instead.
Both PNG and BMP preserve pixel-perfect quality - the visual output is identical. The only differences are file size (BMP is 3–5× larger) and transparency support (PNG has it, BMP doesn't). Converting PNG to BMP doesn't improve or degrade quality - it simply removes compression and transparency for compatibility with systems that require raw pixel data.
Generating BMP files requires more memory than PNG because the output is uncompressed. A batch of twenty 12-megapixel PNGs produces ~700 MB of BMP data. If your browser slows down, process fewer files at a time. On devices with limited RAM (4 GB), process 5–10 images per batch for smooth operation.
💡 Use Cases / Examples
Software developers converting PNG UI assets to BMP for legacy Windows applications and embedded system displays that only accept uncompressed bitmap format - industrial HMI panels, PLC controllers, and custom hardware interfaces.
Researchers converting PNG microscopy captures to BMP for scientific analysis software that requires exact, uncompressed pixel values - ensuring zero compression artifacts affect measurement accuracy in pixel-level analysis.
IT administrators converting PNG icons and interface graphics to BMP for legacy corporate applications and internal tools that were built on older Windows frameworks requiring bitmap input for display rendering.
Print professionals converting PNG designs to BMP for older prepress equipment and large-format printers that require uncompressed input - paired with TIFF versions for modern print workflows.
🔗 Related Image Tools
This converter is part of our complete image tools suite. Frequently used alongside PNG to BMP:
Built for Everyone in India
Whether you need uncompressed images for legacy software, scientific analysis, or technical workflows - this tool delivers raw BMP output.
FAQs - PNG To BMP Converter
Why would I convert PNG to BMP?
▼BMP is required by certain legacy Windows applications, industrial control systems, embedded devices, and scientific imaging software that only accept uncompressed bitmap format. These systems were designed before PNG existed and need raw pixel data that maps directly to memory. If your software doesn't specifically require BMP, there's no advantage over keeping the PNG file, which offers the same quality at much smaller file sizes.
Does BMP provide better quality than PNG?
▼No. Both PNG and BMP preserve pixel-perfect quality - every single pixel is identical. The difference is that PNG achieves this with lossless compression (smaller files) while BMP stores raw uncompressed data (larger files). Converting PNG to BMP does not improve quality in any way. It simply removes the compression wrapper and outputs raw pixel values, which is only useful for software that can't decompress PNG data.
What happens to PNG transparency in BMP?
▼Standard 24-bit BMP does not support transparency. All transparent areas in your PNG are composited against a solid white background during conversion. If your PNG has a transparent background around a logo, the BMP will show a white rectangle. To preserve transparency, keep PNG, convert to WebP, or use ICO format for icons. While 32-bit BMP technically has an alpha channel, support is inconsistent across software.
Does this tool upload my images to a server?
▼No. All conversion happens entirely in your browser using client-side JavaScript and the HTML5 Canvas API. Your PNG images are decoded, transparency is flattened, and the result is encoded as raw BMP pixel data - all locally on your device. No images are uploaded, transmitted, or stored on any server. The tool works offline once loaded.
Why are BMP files so much larger than PNG?
▼BMP stores every pixel as 3 raw bytes (24-bit RGB) with zero compression. PNG uses lossless Deflate compression to store the same pixel data at 3–5× smaller sizes. A 1920×1080 image is always 5.9 MB as BMP, but might be only 1–2 MB as PNG depending on image complexity. Simple graphics with flat colors compress especially well in PNG, making the difference even more dramatic for icon and UI assets.
Are BMP files suitable for websites?
▼No - never use BMP on a website. A single BMP could be 5–15 MB, making page loads extremely slow. Google PageSpeed would flag BMP as a critical performance issue. For web images, keep PNG for transparency, use JPG for photos, or convert to WebP for the smallest files. BMP is strictly for offline software, embedded systems, and technical use cases where web performance is not a consideration.
Can I convert multiple PNGs to BMP at once?
▼Yes, batch conversion is fully supported. Select multiple PNG files and convert them all to BMP simultaneously. Download each individually or use "Download All (ZIP)." Be aware that BMP batches are very large - ten 1920×1080 PNGs produce approximately 60 MB of BMP data. Ensure your device has sufficient storage and memory for large batch conversions.
Do BMP files work on Mac and Linux?
▼Yes, while BMP was created by Microsoft for Windows, it's supported on all platforms. macOS Preview opens BMP files natively, and Linux image viewers like Eye of GNOME and Shotwell handle them without issues. Photoshop, GIMP, and Affinity Photo on all platforms support BMP import and export. Cross-platform compatibility is rarely an issue with modern software.
What is the difference between BMP and TIFF?
▼Both can store uncompressed image data, but TIFF is far more capable. TIFF supports lossless compression (smaller files than BMP), CMYK color spaces, layers, transparency, multi-page documents, and rich metadata. BMP is simpler - raw uncompressed pixels with minimal overhead. For professional workflows, TIFF is preferred. BMP is mainly used for legacy software that predates TIFF support.
Can I use this tool on my phone?
▼Yes, the converter is fully responsive and works on smartphones and tablets through any modern mobile browser - Chrome, Safari, Firefox, or Samsung Internet. Select PNG images from your gallery and convert to BMP directly. Note that BMP files are large, so ensure sufficient storage space on your mobile device before converting high-resolution images.
Are there file size limits for this converter?
▼Input files up to 100 MB are supported. Since BMP output is uncompressed, it will be 3–5× larger than the PNG input. A 12-megapixel PNG produces approximately 36 MB of BMP data. Browser memory is the practical constraint. For best performance, process 5–10 high-resolution images at a time on standard devices with 4+ GB RAM.
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Start Converting to BMP
Get uncompressed, pixel-perfect BMP files from your PNG images - free, private, and browser-based.
🎨 Convert to BMP