Image Formats Explained: PNG, JPG, WebP, HEIC — Complete Guide

Choosing the right image format affects file size, quality, loading speed, and compatibility. Here's a complete rundown of every major format you'll encounter.

JPG / JPEG

Full name: Joint Photographic Experts Group

Compression: Lossy — permanently removes data to reduce size

Transparency: No

Best for: Photographs, social media, email images

Typical size: 50 KB – 2 MB for web photos

JPG has been the standard photo format since the 1990s. Every device, browser, and application supports it. The main limitation is that each save re-compresses the image, gradually degrading quality. Never use JPG for logos, text-heavy graphics, or images you'll edit repeatedly.

PNG

Full name: Portable Network Graphics

Compression: Lossless — no quality loss

Transparency: Yes (full alpha channel)

Best for: Logos, icons, screenshots, images with transparency

Typical size: 100 KB – 10 MB depending on content

PNG was created as a better alternative to GIF (without the patent issues). Its lossless compression and transparency support make it the standard for design assets. PNG files are larger than JPG for photographs, but smaller than JPG for simple graphics with flat colors.

WebP

Creator: Google (2010)

Compression: Both lossy and lossless

Transparency: Yes

Animation: Yes

Best for: Web images, replacing JPG and PNG on websites

Typical size: 25–35% smaller than equivalent JPG

WebP is the modern web format. It does everything JPG and PNG do, but better — smaller files, optional transparency, and support for animation. Browser support is now universal. The main limitation is that some non-browser applications don't yet support it.

HEIC / HEIF

Full name: High Efficiency Image Container / High Efficiency Image Format

Creator: MPEG (used by Apple since iOS 11)

Compression: Lossy (highly efficient)

Transparency: Yes

Best for: iPhone and iPad photos

Typical size: ~50% smaller than JPG at same quality

HEIC is Apple's camera format. It's excellent for storage — photos are about half the size of JPG with the same quality. The problem is compatibility: Windows, Android, and most web platforms don't support HEIC natively. Convert HEIC to JPG for sharing.

GIF

Full name: Graphics Interchange Format

Compression: Lossless (but limited to 256 colors)

Transparency: Binary only (a pixel is fully transparent or fully opaque)

Animation: Yes

Best for: Short looping animations, memes

GIF's 256-color limit makes it poor for photographs. For modern animated content, WebP or MP4 video produce dramatically smaller files. GIF persists primarily for cultural/meme reasons, not technical merit.

SVG

Full name: Scalable Vector Graphics

Type: Vector (not raster/pixel-based)

Scalability: Infinite — looks perfect at any size

Best for: Logos, icons, illustrations, UI elements

SVG isn't a raster format like the others — it stores mathematical descriptions of shapes rather than pixels. This means logos and icons are always crisp at any size. SVGs are typically tiny (1–10 KB), making them ideal for icons and logos on websites.

TIFF

Full name: Tagged Image File Format

Compression: Lossless (usually)

Best for: Print, professional photography, archiving

TIFF files are very large but preserve maximum quality. They're the standard for print-ready files and professional photography archives. Never use TIFF on a website — the files are too large for web delivery.

Quick Format Chooser

Situation	Use
Photo on website	WebP or JPG
Logo or icon	SVG or PNG
Screenshot with text	PNG
iPhone photo to share	Convert HEIC to JPG
Animated image	WebP or MP4
Print design	TIFF or PDF
Email image	JPG