JPG (JPEG) is a JPEG format commonly used for photos, social sharing, email attachments. This guide covers compatibility, compression, transparency, and conversion choices.
| Feature | Support |
|---|---|
| Transparency | No |
| Animation | No |
| Primary uses | photos, email attachments, social sharing, web photographic delivery |
Extension
.jpg
Compression
lossy
Browser support
universal
Inventor
Joint Photographic Experts Group
Inventor organization
ISO/IEC JTC 1 and ITU-T
Origin year
1992
Small photo files
Universal support
Adjustable quality
No transparency
Lossy generation loss
Poor for sharp UI text
JPG is the default delivery format for photographic images because it combines small file sizes with near-universal support. It is not a lossless editing format: every lossy re-export can discard detail, and the format has no alpha transparency.
JPEG still-image coding was standardized in the early 1990s by the Joint Photographic Experts Group as a practical way to compress photographic images for storage and transmission.
Use JPG when compatibility and compact photo delivery matter. Convert to PNG only for lossless workflow compatibility; converting JPG to PNG does not restore detail already lost by JPEG compression.
JPG quality is controlled by encoder settings. Lower quality reduces file size but can introduce blocking, ringing, and color banding.
JPG files often carry Exif, GPS, ICC, IPTC, and XMP metadata. Strip location/camera metadata for public sharing, but preserve ICC profiles when color accuracy matters.
Universal camera, OS, browser, and editing support.
format slug
jpg
inventor
Joint Photographic Experts Group
strengths
Small photo files, Universal support, Adjustable quality
use cases
photos, email attachments, social sharing, web photographic delivery
weaknesses
No transparency, Lossy generation loss, Poor for sharp UI text
color depth
Commonly 8 bits per component in web workflows.
compression
lossy
origin year
1992
standard owner
JPEG Committee / ISO/IEC / ITU-T
browser support
universal
metadata support
Exif, JFIF, XMP, ICC, IPTC
software support
Universal camera, OS, browser, and editing support.
animation support
none
compression method
DCT-based JPEG 1 transform coding
best source formats
raw, heic, tiff, png
best target formats
webp, avif, png
transparency support
none
inventor organization
ISO/IEC JTC 1 and ITU-T
JPG transparency support is: none. Choose a target format with alpha support when transparent backgrounds matter.
Convert JPG when another format better matches compatibility, file size, transparency, metadata, or editing needs.
No. PNG can store the decoded JPG pixels losslessly, but it cannot recover detail already lost by JPEG compression.
Repeated lossy exports can accumulate compression artifacts. Keep a lossless master when you plan to edit repeatedly.
Usually yes for public sharing if the file contains GPS or camera metadata. Preserve ICC profiles when accurate color rendering matters.
JPEG.org - standards_body
ITU-T / ISO/IEC - official_spec
Library of Congress - reputable_reference
MDN Web Docs - browser_documentation
ExifTool - library_documentation
sharp - library_documentation