Image Formats

Image Formats — The Complete Guide (2026)

Everything you need to know about JPG, PNG, WebP, AVIF, HEIC, GIF, SVG — when to use each, how they compare, and how to convert between them for free.

Quick answer: The right image format depends on use case — JPG for photos (small files, universal support), PNG for graphics with transparency, WebP for web images (30% smaller than JPG), AVIF for modern web (50% smaller than JPG), HEIC for Apple devices, SVG for logos and icons (infinitely scalable), GIF for simple animation (though MP4/WebP animated are better choices).

Formats Covered

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Format Comparison at a Glance

Use this table to quickly find the right format. Click any row's converter link to convert instantly in your browser.

Format	Best For	Transparency	Animation	Typical Size	Browser Support
JPG	Photographs, print	No	No	100–500 KB	Universal
PNG	Logos, screenshots, transparency	Yes	No	200 KB – 5 MB	Universal
WebP	Web images (best default)	Yes	Yes	30% smaller than JPG	97%+ modern
AVIF	Next-gen web, HDR photos	Yes	Yes	50% smaller than JPG	~93% modern
HEIC	iPhone photos, Apple ecosystem	Limited	Sequences	Similar to AVIF	Apple only
GIF	Simple animation, memes	1-bit only	Yes	Large (256 colors)	Universal
SVG	Logos, icons, vector art	Yes	Yes (CSS)	1–50 KB	Universal

Format Deep-Dive

JPG — The Universal Photo Format

JPG (JPEG) uses lossy compression to discard imperceptible image data, making it the most compact option for photographs. Quality 85 is the sweet spot for web — 50–70% smaller than the original with virtually no visible difference. The trade-off: every re-save degrades quality slightly, so always work from originals. JPG cannot store transparency.

PNG — Lossless Precision

PNG stores every pixel unchanged, making it ideal for screenshots, logos, and any image with sharp edges or text. It supports full alpha-channel transparency. The cost is file size — a PNG of a photo is typically 3–5× larger than an equivalent JPG. For web photos, PNG is overkill; for UI graphics and brand assets, it's irreplaceable.

WebP — The Web Standard

Developed by Google, WebP is 25–35% smaller than JPG and 25% smaller than PNG at equivalent quality. It supports both lossy and lossless modes, transparency, and animation. With 97%+ browser support as of 2026, WebP is the safe default for all new web images. Use it unless you specifically need legacy compatibility.

AVIF — The New Champion

AVIF is based on the AV1 video codec and delivers roughly 50% smaller files than JPG at the same perceptual quality. It supports HDR, wide color gamut, transparency, and animation. Browser support crossed 93% in 2025. The main limitation is slower encoding — though CDN-based conversion makes this invisible to end users.

HEIC — Apple's Format

HEIC (High Efficiency Image Container) is the default format for iPhone photos since iOS 11. It offers AVIF-level compression (roughly 2× better than JPG) but is essentially an Apple-only format. Android, Windows, and web browsers have minimal native support. Always convert HEIC to JPG before sharing outside the Apple ecosystem.

GIF — Animated Legacy

GIF is capped at 256 colors and uses a 30-year-old compression algorithm, making it inefficient for both photos and animation. For animation, WebP animated is 64% smaller; MP4 video is even smaller. GIF's only advantage is universal compatibility for simple looping animations, though most modern platforms now support WebP or auto-play video.

SVG — Infinitely Scalable

SVG (Scalable Vector Graphics) stores images as mathematical shapes rather than pixels, so they look perfect at any resolution — from favicon to billboard. SVG is the right choice for logos, icons, illustrations, and any graphic that needs to scale. SVG files also support CSS styling and JavaScript interaction. They are not suitable for photographs.

Convert Between Image Formats

All conversions run entirely in your browser — no upload, no account, no size limits.

JPG → PNG→ PNG → JPG→ JPG → WebP→ PNG → WebP→ JPG → AVIF→ HEIC → JPG→ WebP → JPG→ PNG → SVG→ SVG → PNG→ JPG → PDF→ GIF → MP4→ BMP → JPG→

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Related Guides

Comparison

JPG vs PNG vs WebP

Side-by-side quality, size, and use-case breakdown for the three most common formats.

Format Guide

What Is AVIF?

How AV1-based AVIF achieves 50% smaller files than JPG and when to adopt it.

Format Guide

What Is WebP?

Why Google created WebP, how it works, and how to serve it on your website.

How-To

HEIC to JPG Guide

Convert iPhone HEIC photos to JPG on any device — Windows, Mac, Android, or online.

Format Guide

SVG Format Guide

Everything about scalable vector graphics — when to use SVG and how to work with it.

Trends

Future of Image Formats

What comes after AVIF? JPEG XL, HEIF, and the next generation of web image formats.

Frequently Asked Questions

WebP is the best default for websites in 2026. It is 25–35% smaller than JPG and supports transparency like PNG, with 97%+ browser coverage. For cutting-edge performance, AVIF is ~50% smaller than JPG but has slightly less tool support (~93% browser coverage). A good strategy is to serve AVIF with a WebP fallback using the HTML <picture> element.

JPG uses lossy compression — it permanently discards some image data to achieve smaller file sizes, making it ideal for photographs where slight quality loss is acceptable. PNG uses lossless compression — no data is lost, so file sizes are larger but quality is pixel-perfect. PNG also supports transparent backgrounds; JPG does not. Use JPG for photos, PNG for logos, screenshots, and anything requiring transparency.

For web use, yes. WebP produces files 25–35% smaller than JPG at equivalent visual quality. It also supports transparency (which JPG lacks) and lossless compression. All modern browsers support WebP. The only reasons to prefer JPG over WebP are compatibility with older software, legacy systems that cannot process WebP, or email clients that block modern formats.

AVIF is the newest major image format, derived from the AV1 video codec. It produces files roughly 50% smaller than JPG at the same perceived quality — noticeably better than WebP. It supports HDR, wide color gamut, transparency, and animation. Browser support reached ~93% in 2025. Use AVIF for web images if your toolchain supports it; pair it with a WebP or JPG fallback using the HTML <picture> element for full compatibility.