What is JPEG?

Full name

JPEG (same encoding as JPG)

Kind

lossy raster image

File extension

.jpeg, .jpg

MIME type

image/jpeg

Developer / standard

Joint Photographic Experts Group · 1992

Compression

DCT-based lossy (JPEG)

Quality model

Lossy

Container

No / single bitstream typical

Common codecs

JPEG

Technical sources

—

Transparency

Not supported

Animation

No (still / non-animated typical use)

Typical size

Small for photos; poor for screenshots with text

Browser support

All browsers

Compatibility

The most widely accepted photo format on the web, in email, and on phones — virtually every device decodes JPEG

JPEG splits images into blocks and discards high-frequency detail people notice less. Quality settings trade size for sharpness. Each re-encode can add generation loss — keep a master when you expect more edits. JPG is excellent for photos and weak for flat UI text.

Quality: Adjustable; higher quality = larger file

Typical size: Small for photos; poor for screenshots with text

JPEG has no alpha channel. Transparent designs must be flattened onto a background color or converted to PNG/WebP/AVIF that support transparency.

Standard JPEG is a still image. Motion requires another format (GIF, animated WebP, or video such as MP4).

EXIF (camera, lens, exposure, orientation), IPTC/XMP captions, and sometimes GPS. Browsers may auto-rotate using orientation tags. Strip metadata before publishing if location or device details should stay private.

Related tools: image metadata viewer · metadata remover

• Photographs
• Social media uploads
• Email image sharing
• Large photo galleries where size matters

• Logos with flat colors
• Screenshots of UI text
• Graphics needing transparency
• Masters you will re-edit many times

• Tiny photo files
• Works everywhere
• Fast to decode
• Default share format after HEIC conversion
• Ideal for social uploads

• Lossy artifacts
• No transparency
• Re-saving degrades quality
• Soft edges on text and line art

The most widely accepted photo format on the web, in email, and on phones — virtually every device decodes JPEG

Browsers: All browsers

• Every camera roll
• Photoshop
• Lightroom
• Browsers

• All phones and desktops
• Modern desktops
• Phones and tablets with compatible apps

Open in any gallery app, browser, or image editor. If colors look odd, check whether the file uses an unusual color profile.

Treat JPEG like JPG — convert with Format Convertly’s JPG tools in your browser.

Incoming conversions strengthen the JPEG cluster — e.g. JPG → JPEG, PNG → JPEG.

Compare JPEG with related formats to pick the right container for quality, size, and compatibility.

Decision pages that cite JPEG — the next hop after a vs comparison.

Tools extend the format graph beyond one-off conversion — compression, metadata, and utilities for real workflows.

• T.81 : Information technology — Digital compression and coding of continuous-tone still images — ITU-T / ISO/IEC