Format guide
What is JPG?
JPEG (Joint Photographic Experts Group) is a lossy raster image format optimized for photographs and complex color gradients, created by Joint Photographic Experts Group (1992). JPG/JPEG is still the default camera-share format: small files, universal decoding, and good enough quality for social and email. Avoid it for logos and screenshots with sharp text — use PNG or WebP instead.
JPG format specifications
- Full name
- JPEG (Joint Photographic Experts Group)
- Kind
- lossy raster image
- File extension
- .jpg, .jpeg
- 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
- ITU-T / ISO: JPEG (T.81 / ISO/IEC 10918-1)
- 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
JPG compression & quality
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
Transparency & animation
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).
JPG metadata
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
Best use cases for JPG
- Photographs
- Social media uploads
- Email image sharing
- Large photo galleries where size matters
When to avoid JPG
- Logos with flat colors
- Screenshots of UI text
- Graphics needing transparency
- Masters you will re-edit many times
Advantages
- Tiny photo files
- Works everywhere
- Fast to decode
- Default share format after HEIC conversion
- Ideal for social uploads
Disadvantages
- Lossy artifacts
- No transparency
- Re-saving degrades quality
- Soft edges on text and line art
Compatibility
The most widely accepted photo format on the web, in email, and on phones — virtually every device decodes JPEG
Browsers: All browsers
Software support
- Every camera roll
- Photoshop
- Lightroom
- Browsers
Device support
- All phones and desktops
- Modern desktops
- Phones and tablets with compatible apps
How to open JPG
Open in any gallery app, browser, or image editor. If colors look odd, check whether the file uses an unusual color profile.
How to convert JPG
Convert JPG to PNG when you need lossless edits or a path to transparency, or to WebP/AVIF for smaller web delivery, using Format Convertly locally in your browser.
Popular JPG conversions
Convert to JPG
Incoming conversions strengthen the JPG cluster — e.g. JPG → JPG, PNG → JPG.
JPG comparison guides
Compare JPG with related formats to pick the right container for quality, size, and compatibility.
Best format guides featuring JPG
Decision pages that cite JPG — the next hop after a vs comparison.
JPG how-to guides
Related formats
JPG tools
Tools extend the format graph beyond one-off conversion — compression, metadata, and utilities for real workflows.
Technical sources
JPG FAQ
What is a JPG file?
JPG is a lossy raster image format optimized for photographs and complex color gradients. JPG/JPEG is still the default camera-share format: small files, universal decoding, and good enough quality for social and email. Avoid it for logos and screenshots with sharp text — use PNG or WebP instead.
Is JPG lossy or lossless?
JPG is typically lossy (DCT-based lossy (JPEG)). That keeps files small but means discarded detail cannot be restored later.
Does JPG support transparency?
JPG does not support an alpha channel. Convert to PNG, WebP, AVIF, or SVG when you need transparent backgrounds.
How do I open a JPG file?
Open in any gallery app, browser, or image editor. If colors look odd, check whether the file uses an unusual color profile.
How do I convert JPG privately?
Convert JPG to PNG when you need lossless edits or a path to transparency, or to WebP/AVIF for smaller web delivery, using Format Convertly locally in your browser. Format Convertly keeps processing in your browser so files are not uploaded to a conversion server.
Are JPG and JPEG the same format?
Yes. JPG and JPEG refer to the same image encoding. The extension differs (.jpg vs .jpeg) for historical filename-length reasons; MIME type is image/jpeg.
Does JPG keep EXIF metadata?
Often yes — cameras and phones embed EXIF (orientation, camera model, sometimes GPS). Remove metadata before publishing if location privacy matters.
Why do JPG screenshots look soft?
JPEG is tuned for photos, not sharp UI text. Use PNG or WebP lossless for screenshots and logos.
Are my JPG files uploaded on Format Convertly?
No. JPG conversion runs in your browser. Files are not sent to Format Convertly servers for processing.