JPG vs PNG vs WebP: Which Image Format Should You Use?

Introduction

Choosing the right image format is one of the most impactful decisions for web performance. The same image can weigh 500 KB as a PNG, 80 KB as a JPEG, and 50 KB as a WebP — a 10x difference in file size with nearly identical visual quality. This guide explains what makes each format different and gives clear guidance on when to use each one.

The Main Image Formats Compared

JPEG (JPG)

**Created**: 1992 by the Joint Photographic Experts Group

**Best for**: Photographs, complex imagery with many colors and gradients

**Supports transparency**: No

**Compression**: Lossy

JPEG uses discrete cosine transform (DCT) to analyze image blocks and discard high-frequency detail that the human eye is less sensitive to. The result is dramatic file size reduction with minimal visible degradation for photographic content.

**Quality settings** in JPEG range from 0 (maximum compression, terrible quality) to 100 (minimal compression, near-lossless). In practice:

• Quality 75–85 is the web standard — looks good, loads fast
• Quality 90–95 is for high-fidelity images where quality matters
• Quality 60–70 is for thumbnails and previews

**When to use JPEG**:

• Product photos
• Blog post images
• Profile photos
• Background images
• Any photograph without transparent areas

**When NOT to use JPEG**:

• Screenshots with text (compression artifacts make text blurry)
• Images needing transparency
• Logos and graphics with flat colors
• Images you'll edit repeatedly (each save degrades quality)

PNG

**Created**: 1996 as a patent-free GIF replacement

**Best for**: Screenshots, logos, graphics, images needing transparency

**Supports transparency**: Yes (8-bit and full alpha)

**Compression**: Lossless

PNG uses DEFLATE compression (the same algorithm as ZIP files). It removes data redundancy without discarding any image information. This means the original can be perfectly reconstructed, but it also means file sizes are much larger than JPEG for photographic content.

PNG has two variants:

• **PNG-8**: Up to 256 colors, like GIF. Good for simple graphics.
• **PNG-24**: Full 16 million colors with full transparency. For complex images.

**When to use PNG**:

• Logos and branding assets
• Icons and UI elements
• Screenshots (especially with text)
• Images with transparent backgrounds
• Images you plan to edit and re-save multiple times
• Computer-generated graphics with flat colors

**When NOT to use PNG**:

• Photographs (file sizes will be enormous)
• Background images (WebP is better)
• High-volume page images (they'll slow down your page)

WebP

**Created**: 2010 by Google

**Best for**: Everything on the modern web

**Supports transparency**: Yes

**Compression**: Both lossy and lossless modes

WebP uses VP8 video intra-frame encoding for lossy compression and a custom format for lossless. The result:

• **25–35% smaller than JPEG** at equivalent visual quality
• **20–40% smaller than PNG** for lossless images with transparency
• Full transparency support even in lossy mode
• Animation support (better than GIF, more efficient)

**Browser support as of 2026**: All modern browsers including Chrome, Firefox, Safari (since v14), Edge. Internet Explorer is the only notable exception (but IE usage is below 0.5%).

**When to use WebP**:

• Any image on a website where performance matters
• Replacing JPEG for photos
• Replacing PNG for logos/graphics when IE support is not needed
• Animated images (instead of GIF)

**The catch**: WebP files cannot be opened by some older image editing software. If you need to edit and re-save the file later, keep a PNG or JPEG master and convert to WebP for the web version.

AVIF

**Created**: 2019 based on the AV1 video codec

**Best for**: Next-generation web images

**Supports transparency**: Yes

**Compression**: Lossy and lossless

AVIF is the next step beyond WebP, offering:

• **50% smaller than JPEG** at equivalent quality
• Better quality at very low file sizes compared to WebP

**Browser support as of 2026**: Chrome (85+), Firefox (93+), Safari (16+). Growing fast.

**When to use AVIF**: If you're targeting modern browsers and can provide JPEG/WebP fallbacks using the HTML <picture> element.

Side-by-Side File Size Comparison

For a typical 1920×1080 photograph:

For a 500×500 logo on white with transparency:

How to Convert Between Formats

Using SaveOnlineVideos Image Tools

Our free tools handle all common conversions:

• [JPG to PNG Converter](/tools/jpg-to-png) — Convert JPEG to PNG for transparency support
• [WebP Converter](/tools/webp-converter) — Convert JPG or PNG to WebP for smaller web images
• [Image Compressor](/tools/image-compressor) — Reduce file size of any image format

Quick Decision Guide

**I have a photograph:**

→ Use JPEG (quality 80–85) or WebP (quality 80) for the web

**I need transparency:**

→ Use PNG or WebP

**I have a logo/icon:**

→ Use SVG (if vector), PNG, or WebP

**I'm building a modern website:**

→ Use WebP for everything, with JPEG fallbacks

**I need to print:**

→ Use TIFF or high-quality JPEG (quality 95+)

Choosing Formats for Specific Platforms

Instagram / Social Media

Instagram re-encodes all images, so upload the highest-quality version you have (JPEG quality 95 or PNG). The platform will do the compression.

WordPress Websites

Use WebP for new images (WordPress supports WebP natively since version 5.8). For older images, JPEG quality 80 is a good balance.

Shopify / E-commerce

Product photos should be JPEG quality 80–85 or WebP. Background-removed product shots need PNG or WebP for transparency.

Email

Use JPEG — most email clients don't support WebP. Keep images small (under 1 MB total for the email).

Conclusion

The short answer: **WebP is the best all-around format for the web in 2026**. Use it everywhere you can, with JPEG as a fallback for older browsers. Keep PNG for images requiring perfect lossless quality or when working with source files.

Convert your images to WebP for free using our WebP Converter.