Convert BMP to PNG Online Free
Convert BMP to PNG for lossless quality, transparency, and universal web compatibility.
ToFormat — free online converter
Upload your files
Max file size: 30MB · Up to 20 files at once
Why ToFormat?
Lossless Output
PNG is a lossless format. Converting BMP to PNG preserves every pixel exactly — ideal for editing, web graphics, and archiving without quality loss.
Transparency Preserved
BMP supports alpha channels (32‑bit); PNG fully retains transparency. Perfect for logos, overlays, and images with transparent backgrounds.
Dramatic Size Reduction
BMP files are uncompressed and huge. PNG compresses them losslessly, reducing size by 50‑70% while preserving every detail.
About the Formats
🖼️ What is BMP?
BMP (Bitmap) is a raster graphics format developed by Microsoft. It stores pixel data uncompressed, resulting in large files but exact fidelity. BMP supports 1‑bit to 32‑bit color, including alpha transparency in 32‑bit versions. It is supported everywhere but impractical for web use due to size.
All BMP conversion tools →🖼️ What is PNG?
PNG (Portable Network Graphics) is a lossless raster format created in 1996. It supports full alpha transparency, 24‑bit color, and is widely used for web graphics, logos, and screenshots. PNG uses DEFLATE compression, offering smaller files than BMP while preserving quality.
All PNG conversion tools →How to Convert
Upload your BMP
Click or drag and drop your BMP files. You can select up to 20 at once.
Choose options
PNG is always lossless. Optionally strip metadata or keep color profiles.
Download PNGs
Your PNG files are ready. Download individually or as a ZIP archive. Files auto‑delete in 10 minutes.
When to Convert BMP to PNG
🌐 Web Graphics
PNG is web‑friendly. Convert your BMP logos, icons, and illustrations to PNG for use on websites, with full transparency preserved.
💡 Smaller size: PNG to WebP →🎨 Graphic Design
Design software (Photoshop, GIMP) handles PNG perfectly. Convert BMP to PNG for editing, sharing, and client deliveries.
💡 For printing: PNG to TIFF →📱 Mobile Apps
Mobile developers need PNG assets. Convert BMP graphics to PNG for integration into iOS and Android apps.
💡 For icons: PNG to ICO →📂 Archiving
PNG is a lossless, open format. Convert important BMPs to PNG for long‑term storage with smaller file sizes.
💡 Reverse: PNG to BMP →Format Comparison
| Format | BMP | PNG |
|---|---|---|
| Compression | Lossless | Lossless |
| Transparency | No | Yes |
| File Size | Larger | Larger |
PNG is lossless and compresses BMP dramatically. For photos where file size matters more than perfect fidelity, consider BMP to JPG. For transparency, BMP to PNG is the way to go.
💡 Pro Tips
- BMP files are huge because they are uncompressed. PNG compression can reduce size by 50‑70% without losing any quality.
- If your BMP has alpha transparency (32‑bit), PNG will preserve it perfectly. Great for logos and UI elements.
- PNG supports gamma correction and ICC profiles. We preserve color information if you enable metadata retention.
- Use PNGQuant or OxiPNG after conversion to losslessly reduce file size further.
- Convert in batch mode — upload multiple BMPs and download them all as a ZIP archive.
- We strip metadata by default for privacy, but you can keep EXIF by toggling the option before conversion.
- BMP does not support EXIF metadata, so color profiles are rarely present. PNG can store text metadata if needed.
How BMP to PNG Conversion Works
BMP stores images as raw pixel data with a simple header. This makes it completely lossless but extremely large. PNG uses DEFLATE compression to reduce file size losslessly, preserving every pixel exactly.
When you convert BMP to PNG, our servers decode the BMP to raw pixels, then encode them using the PNG format. For 32‑bit BMPs with alpha, we preserve the transparency channel. The result is a much smaller file that is pixel‑identical to the original BMP.
All processing happens in memory, and your files are permanently deleted after 10 minutes.
BMP vs PNG: Key Differences
File size: BMP is uncompressed — huge. PNG uses lossless compression, typically 50‑70% smaller.
Transparency: Both support alpha, but PNG’s implementation is universally compatible, while BMP’s 32‑bit alpha is often ignored by older software.
Use cases: BMP for legacy systems or when absolute pixel‑level fidelity is required. PNG for web, design, and modern applications.
When to Convert BMP to PNG
Convert BMP to PNG when you need to save space, use images on the web, or ensure compatibility with modern software. PNG is the standard for lossless graphics with transparency. For professional work where BMP is required (e.g., legacy software), keep the original.
Our PNG to BMP converter helps you go the other way when you need a BMP from a PNG.