JPG vs PNG vs WebP vs BMP: Which Format to Use?

Complete guide to image formats: JPG, PNG, WebP, and BMP. Learn which format to use and how to convert between them.

In the digital world, not all image files are created equal. Choosing the exact right image format can make a massive difference in server bandwidth, page load times, and visual crispness.

Here is everything you need to know about the four most common image formats on the internet, and exactly when to use them.

🏆 The Ultimate Format Comparison

Feature	JPG (JPEG)	PNG	WebP (Modern)	BMP (Legacy)
Compression Type	Lossy	Lossless	Both	None (Raw)
Transparency (Alpha)	No	Yes	Yes	No
Typical File Size	Small	Large	Very Small	Enormous
Browser Support	100%	100%	97%+	100%
Best Professional Use	Photographs	UI Graphics & Text	Modern Web Dev	Archival only

🥇 The Modern King: WebP

Best For: All modern web development where load speed is paramount.

Developed entirely by Google, WebP is the modern replacement for both JPG and PNG. It supports both lossy and lossless compression, and it supports full transparency. Most importantly, it produces file sizes that are typically 25% to 35% smaller than highly-optimized JPGs at the exact same visual quality.

💡 Browser Support Note: WebP is now universally supported across Chrome, Firefox, Edge, and Safari (14+). If you are building a website today, you should be serving WebP images.

📸 The Classics: JPG and PNG

JPG (JPEG): The undisputed king of digital photography. JPG uses lossy compression to violently reduce file sizes. At 80% quality, the difference from the original is completely invisible to the human eye, but the file size is drastically smaller. Warning: JPG does not support transparent backgrounds.

PNG: The standard for graphics, logos, screenshots, and typography. PNG uses lossless compression, meaning the image is mathematically pixel-identical to the original. This makes it perfect for UI design, but creates incredibly heavy file sizes that can slow down a website.

🦕 The Dinosaur: BMP (Bitmap)

Best For: Absolutely nothing on the modern internet.

BMP is a completely uncompressed, legacy format created by Microsoft in the 1990s. It stores data for every single pixel individually. A standard 1920×1080 BMP can weigh a massive 6 Megabytes, while the exact same image saved as a JPG might be a tiny 200 KB. Never use BMP for web development.

🚀 Need to modernize your image formats? Use our blazing fast, free Image Format Converter to seamlessly convert between JPG, PNG, WebP, and BMP instantly right in your browser. Perfect for upgrading older JPGs into ultra-lightweight WebP files!