Convert BMP to PNG Online

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Total Image Converter To Convert TIFF, JPEG, ICO, BMP

Convert Images in Batch!;
Convert BMP to PNG and in many other formats
Process hundreds of files in 3 clicks;
Have a desktop converter that works without Internet;
Keep your files safe, don't send them to the web;
Get a more poweful engine for large images and RAW photos.

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Total Image Converter

JPEG, TIFF, PSD, PNG, etc.

Total Image Converter supports the widest list of output file types: PDF, TIFF, BMP, PNG, JPEG, JPEG2000, ICO, GIF, PCX, TGA, PXM, PS, PCL! Besides, it converts many rare formats like PALM, PICT, XPM, FIX.

Rotate Images

Along with conversions you can rotate your images! All is done in batch so you save a lot of your valuable time.

Resize Images

With Total Image Converter it's very easy to resize your photos or images in batch. Make them suitable for the web or emailing.

RAW photos

Total Image Converter supports almost all RAW camera photos (CRW, CR2, NEF, PEF, RAF, X3F, RAW, BAY, ORF, NRW, SRF, MRW). Save them as TIFF or JPEG files for easy publishing or sharing.

Watermarks

Add text watermarks to the header or the footer of the output file to prevent unauthorized use.

Clear interface

The inerface of the pss is clear and straightforward. The built-in Preview panel helps you to view each file full-sized and learn the info about it.

Command line

Total Image Converter can be run via command line (get the ready-to-use BAT file from GUI settings).

How to convert BMP to PNG?

💾 Upload Your File: Go to the site, click on «Upload File,» and select your BMP file.

✍️ Set Conversion Options: Choose PNG as the output format and adjust any additional options if needed.

Convert and Download: Click 👉«Download Converted File»👈 to get your PNG file.

Cloud Based

There is no need to install any software to convert BMP to PNG with CoolUtils. Simply access the internet, and you can easily convert your file online with our service.

Secure

Our hardware operates in top-tier, highly secure data centers equipped with advanced electronic surveillance and multi-factor access control systems.

Ease of Use

Converting BMP bitmap images to PNG online has never been so simple. Drop your .bmp file and the converter transcodes the uncompressed bitmap to lossless PNG, preserving every pixel while significantly reducing file size. Unlike JPEG, PNG supports transparency — making BMP-to-PNG ideal for web graphics, UI elements, icons, and images that require a transparent background.

Privacy

We understand the importance of privacy, which is why we've developed a comprehensive privacy policy detailing how we handle your files and personal information. You can read the policy here.

BMP File

File extension	.BMP, .RLE, .DIB
Category	Image File
Description	May be the simplest file format, BMP was developed jointly by Microsoft and IBM. That is why it is widespread on Windows platform. This extension is characterized a raster graphic format which is recognized by many programs today. In comparison with other bitmap formats, JPEG and GIF, BMP keeps color data for each pixel in the image and doesn't compress images to decrease a file size. That is what makes it perfect file format for printable images.
Associated programs	Adobe Photoshop MS Paint Microsoft Photo Editor Paintbrush
Developed by	Microsoft
MIME type	image/bmp Image/x-ms-bmp
Useful links	More detailed information on BMP files
Conversion type	BMP to PNG

PNG File

File extension	.PNG
Category	Image File
Description	PNG images provide lossless compression, that is why the quality of the picture is nice, but the size of the file is huge. Because of it this file format is used by photographers. PNG may have several layers of transparency and even include short text descriptions which help search engines to examine the file. Although PNG was developed to replace GIF and partly other formats, it doesn’t support animation since it can’t contain several images like GIF.
Associated programs	Apple Preview Corel Paint Shop Pro GIMP - The GNU Image Manipulation Program (LINUX) Microsoft Windows Photo Gallery Viewer Safari
Developed by	PNG Development Group
MIME type	image/png
Useful links	More detailed information on PNG files

2024-09-13

Excellent conversion from BMP to PNG. Very easy to use.

Jacob Roberts

Rating BMP to PNG

4.9 (2190 votes)Rate It

BMP to PNG — Frequently Asked Questions ▼

What is a BMP file and why is converting it to PNG useful?

BMP (Bitmap) is an uncompressed raster image format developed by Microsoft and used natively by Windows applications including Paint, the clipboard, and many legacy industrial and embedded systems. BMP stores every pixel as raw color data with no compression — a 1920×1080 24-bit BMP weighs approximately 5.9 MB. PNG (Portable Network Graphics) uses lossless DEFLATE compression and achieves typical file size reductions of 60–80% for the same image content. Converting BMP to PNG makes images significantly smaller while preserving every pixel exactly.

Is BMP to PNG conversion lossless?

Yes — both BMP and PNG store pixel data without perceptual compression, so converting between them involves no quality loss whatsoever. Every pixel in the output PNG is identical to the corresponding pixel in the source BMP. This makes BMP-to-PNG conversion safe for images that must be edited further, screenshots used in documentation, and graphics processed by image analysis software.

Does PNG support transparency, and does BMP?

PNG fully supports transparency through an alpha channel — each pixel can be fully opaque, fully transparent, or any level in between. 32-bit BMP files include an alpha channel in theory, but support is inconsistent across applications. 24-bit BMP (the most common variant) has no transparency support. Converting a 32-bit BMP with an alpha channel to PNG preserves the transparency correctly. Converting a 24-bit BMP produces a PNG with a white or opaque background.

Will converting BMP to PNG significantly reduce my file size?

Yes — PNG's lossless DEFLATE compression typically reduces BMP file sizes by 60–80% for photographic content and even more for images with large uniform-color regions (such as screenshots, diagrams, and illustrations with solid backgrounds). A 5.9 MB 1920×1080 BMP typically compresses to 1–2 MB as PNG without any loss of visual information.

What is the difference between PNG and JPEG for BMP source files?

PNG is lossless — it preserves every pixel exactly and supports transparency. JPEG is lossy — it discards some image data to achieve smaller files and does not support transparency. For screenshots, UI elements, icons, logos, and line art with sharp edges, PNG is always the correct choice because JPEG introduces ringing artifacts around hard edges. For photographic BMP images where maximum compression matters and transparency is not needed, JPEG produces smaller files at the cost of some quality.

Is there a file size limit for online BMP to PNG conversion?

The online converter accepts BMP files up to 50 MB. Large high-resolution BMP images — such as uncompressed exports from industrial cameras, medical imaging devices, or large-format scans — can easily exceed this limit due to BMP's lack of compression. For large or batch BMP conversion, Total Image Converter handles unlimited file sizes and can process entire folders of BMP images to PNG.

Can I batch convert multiple BMP files to PNG?

The online converter handles one file at a time. For bulk conversion of screenshot archives, scan batches, or industrial image exports in BMP format, Total Image Converter processes entire folders in a single operation — preserving folder structure and applying conversion settings consistently across all files.

Convert BMP to PNG Online — Uncompressed Bitmap to Lossless PNG

BMP (Bitmap) is the original Windows image format — simple, uncompressed, and pixel-perfect, but impractically large for any modern workflow. A single 1920×1080 BMP file weighs around 6 MB with no compression whatsoever, making it unsuitable for email, web use, cloud storage, or sharing. PNG achieves lossless compression of that same image to under 1 MB with zero quality loss — every pixel is identical to the original. Converting BMP to PNG gives you the same pixel-perfect fidelity as the source bitmap, supports full alpha transparency that BMP lacks, and produces a file that every browser, design tool, and image editor accepts natively. No quality trade-off, dramatically smaller size.

What Is a BMP File?

BMP (Bitmap Image File) is the native raster image format developed by Microsoft for Windows. Introduced with Windows 3.0 in 1990, BMP stores pixel color values in a simple grid with no compression (or only basic RLE compression for 4-bit and 8-bit images). BMP files contain a file header, an info header describing dimensions and color depth, and a raw pixel data block — no lossy compression, no gamma correction, no color profiles. BMP supports 1-bit (monochrome), 4-bit, 8-bit, 16-bit, 24-bit, and 32-bit color depths. The 24-bit format (true color) is the most common — 3 bytes per pixel, no compression, no alpha channel.

Uncompressed: Raw pixel data — no quality loss, no compression artifacts.
Simple format: No encoding complexity — every pixel stored as-is.
Windows native: Built into Paint, older screen capture tools, and scan software.
Large file size: ~6 MB for a 1920×1080 24-bit image — no compression.
No alpha channel: Standard BMP has no transparency support.

Who Needs BMP to PNG Conversion?

Web developers: Converting BMP screenshots, button graphics, and UI elements to PNG for use on websites — browsers cannot display BMP and expect PNG or JPEG.
Graphic designers: Using BMP source files from Windows scan software or legacy applications in modern design tools (Figma, Adobe Illustrator, Sketch) that work natively with PNG.
Developers: Converting BMP assets from Windows application resources, icon bitmaps, and dialog graphics to PNG for cross-platform deployment.
Document creators: Embedding images captured as BMP by older screenshot tools into Word, PowerPoint, or Google Slides documents as compact PNG files.
Archivists: Reducing storage requirements for large BMP scan archives by converting to lossless PNG, which achieves 50–80% file size reduction with no data loss.
Game developers: Converting BMP texture and sprite assets from legacy tools to PNG, which supports alpha transparency required for transparent sprite backgrounds.

BMP vs PNG — Key Differences

Property	BMP	PNG (Portable Network Graphics)
Compression	None (or basic RLE for ≤8-bit)	Lossless DEFLATE — significant size reduction
File size (1920×1080)	~6 MB uncompressed	~1–3 MB lossless
Image quality	Pixel-perfect — no encoding	Pixel-perfect — lossless compression
Alpha transparency	Not supported (standard BMP)	Full 8-bit alpha channel
Web browser support	Not supported in browsers	Universal — all browsers display PNG
Color profiles / metadata	Minimal	ICC color profiles, gamma, text metadata
Design tool support	Limited — older tools only	Universal — all design and editing tools
Cross-platform	Windows-centric	ISO standard — works on every OS

How BMP to PNG Conversion Works

The converter reads the BMP file header to determine color depth (1-bit, 8-bit, 24-bit, or 32-bit) and pixel dimensions, then decodes the raw pixel data from the bitmap data block. For 24-bit BMP files, each pixel is stored as three consecutive bytes (blue, green, red in Windows BMP order) — the converter reads these and maps them to the RGB color model used by PNG. The pixel grid is then compressed using PNG's DEFLATE algorithm, which applies prediction filters row-by-row before entropy coding — achieving significant file size reduction with mathematically lossless compression. All pixel values in the output PNG are identical to the input BMP.

BMP to PNG Use Cases

Web publishing: Convert BMP screenshots, diagrams, and graphics to PNG for embedding in websites, blogs, and online documentation where browsers require PNG or JPEG.
Email and sharing: Reduce a 6 MB BMP file to under 1 MB as PNG for attachment in emails and messaging apps with file size limits.
Legacy asset conversion: Migrate BMP sprite sheets, UI bitmaps, and icon resources from Windows applications to PNG for cross-platform and web deployment.
Document embedding: Insert converted PNG images into Word, Google Docs, and PowerPoint presentations — far smaller than the source BMP for manageable document sizes.
Print and design import: Import scanned images saved as BMP by older flatbed scanners into Adobe Photoshop, GIMP, and Affinity Photo as PNG for editing with full tool support.
Archive compression: Convert BMP scan archives to lossless PNG to reclaim disk space — a 100 GB BMP archive often compresses to 20–40 GB in PNG without any image degradation.