PNG vs JPG, JPEG vs JPG — everything explained
Learn what JPG is, when to use it, and how it compares to other formats.
JPG (Joint Photographic Experts Group) is the world's most popular image format, developed in 1992 specifically for compressing photographic images.
JPG uses a lossy compression algorithm that reduces file size by selectively discarding image data that is less visible to the human eye.
Supported by every device, browser, operating system, printer, and application. If you need maximum compatibility, JPG is the answer.
The short answer: there is no difference. JPEG and JPG are the same file format.
JPEG = Joint Photographic Experts Group (the full name of the format)
.jpg = The file extension used on Windows (which historically required 3-character extensions)
.jpeg = The file extension used on Mac and Linux (allows longer extensions)
When you rename a .jpeg file to .jpg, the file is identical — no data changes, no quality loss. Our JPEG to JPG converter makes this instant.
| Feature | JPG | PNG |
|---|---|---|
| File Size | ✓Small — lossy compression removes data | Large — lossless, preserves all data |
| Quality | Good — some quality loss at high compression | ✓Perfect — no quality loss ever |
| Transparency | No — always solid background | ✓Yes — full alpha channel support |
| Best for | ✓Photographs, social media, web images | ✓Logos, icons, screenshots, text |
| Browser support | ✓Universal — all browsers and apps | ✓Universal — all browsers and apps |
| Color depth | ✓Up to 16.7M colors (24-bit) | ✓Up to 16.7M colors + alpha (32-bit) |
Learn more with these free how-to guides.
Everything you need to know
There is no technical difference between JPG and JPEG — they are the same format. "JPEG" stands for Joint Photographic Experts Group, the committee that created the standard. "JPG" became common because early Windows systems required 3-letter file extensions. Today, both .jpg and .jpeg files are identical in format and quality.