JPG vs PNG vs WebP vs SVG: When to Use Each Image Format

Choosing the wrong image format costs you either file size, quality, or compatibility — sometimes all three. The right choice depends on what type of image you have and what you need from it. This guide covers the four formats you'll encounter most in web and digital work.

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The fundamental split: raster vs vector

Before getting into specific formats, there's a more important distinction:

Raster images store color values for every pixel in a grid. A 1000×600 raster image stores 600,000 pixel colors. When you scale a raster image up beyond its original dimensions, the algorithm has to invent pixels — the result gets blurry. JPG, PNG, and WebP are all raster formats.

Vector images store mathematical descriptions of shapes — "draw a circle of radius 50 at position (100, 100), fill it with this color." The image can be scaled to any size and remains perfectly sharp. SVG is a vector format.

If your image is a photograph or detailed texture, it must be raster. If it's a logo, icon, illustration, or diagram made of clean shapes and lines, it can and should be vector.

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JPG (JPEG)

What it is: A lossy compressed raster format. When you save a JPG, the encoder discards fine color detail to achieve a smaller file size. The more you compress, the worse it looks.

How it compresses: JPG divides the image into 8×8 pixel blocks and applies a Discrete Cosine Transform — a frequency analysis that identifies which color variations the human eye is least sensitive to, and discards them first.

Supports transparency: No. JPG has a white background by default. If you save a logo with transparency as a JPG, the transparent areas become white.

Browser support: Universal — every browser since the 1990s.

Use JPG for:

• Photographs (product shots, portraits, landscapes)
• Any image where slight color variation is acceptable
• Situations where file size is a priority
• Any image without transparent areas

Don't use JPG for:

• Screenshots with text — the block compression creates visible artifacts around high-contrast edges (text becomes blurry)
• Images you plan to edit and re-save repeatedly (each save adds more compression artifacts)
• Logos, icons, or graphics with solid color areas
• Anything that needs a transparent background

Typical sizes: A 1200×800 photograph at JPG quality 80 is typically 100–200 KB. The same image at quality 40 might be 40–60 KB with visible degradation.

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PNG

What it is: A lossless compressed raster format. Every pixel is stored exactly — no data is ever discarded. You can save a PNG as many times as you like with no quality loss.

How it compresses: PNG uses DEFLATE compression (the same algorithm as ZIP) on the raw pixel data. It's lossless — the original pixel values are exactly restored when the file is opened.

Supports transparency: Yes. PNG uses an alpha channel — each pixel has a transparency value from fully opaque to fully transparent. This allows smooth anti-aliased edges against any background.

Browser support: Universal.

Use PNG for:

• Logos and brand assets (especially when needed on colored backgrounds)
• Screenshots (the lossless compression keeps text sharp)
• Images with transparent areas
• Graphics, illustrations, and icons with solid color regions
• Any image you'll edit and re-export multiple times

Don't use PNG for:

• Photographs (PNG files are typically 5–10× larger than equivalent JPGs)
• Full-bleed background images on web pages (where file size affects page load)

Typical sizes: A 1200×800 photograph as PNG is typically 800 KB–2 MB. The same file as JPG at quality 80 would be 100–200 KB. PNG is the wrong choice for photos.

You can convert between formats using our JPG to PNG converter — or resize and export as PNG using the Image Resizer which supports format conversion in the same operation.

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WebP

What it is: A modern image format from Google that supports both lossy and lossless compression — and does both better than JPG and PNG respectively. WebP supports transparency (like PNG) and animation (like GIF), all in a single format.

How it compresses: The lossy variant uses a variant of VP8 video compression — it's more sophisticated than JPG's block DCT and achieves smaller files at equivalent quality. The lossless variant uses a custom algorithm that outperforms PNG's DEFLATE on most images.

Supports transparency: Yes, in both lossy and lossless modes.

Browser support: All major browsers since 2020 — Chrome, Firefox, Safari, Edge. Internet Explorer does not support WebP, but IE usage is negligible.

Use WebP for:

• Web images generally — it's better than JPG and PNG in almost every way for web delivery
• Photos where you want JPG-style compression but 25–35% smaller files
• Graphics where you want PNG-style losslessness but smaller files
• Anything on a web page where load speed matters

Don't use WebP for:

• Editing in software that doesn't support it (some older tools don't handle WebP)
• Images destined for systems that may not support WebP (some email clients, legacy software)

Typical sizes: A 1200×800 photo at WebP quality 80 is typically 70–130 KB — about 30% smaller than equivalent JPG. The savings are consistent and meaningful for high-traffic web pages.

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SVG

What it is: Scalable Vector Graphics — an XML-based vector format for 2D graphics. SVG files describe images using geometric shapes, paths, and text, not pixels.

How it works: An SVG file contains markup like: <circle cx="50" cy="50" r="40" stroke="black" fill="red" />. When rendered, the browser draws the shape at whatever size it's displayed — there are no pixels to blur.

Supports transparency: Yes, natively.

File size: Small for clean vector content, large for complex ones. A simple logo SVG might be 2 KB. A complex illustration with thousands of paths might be 500 KB — at which point a raster format is often more practical.

Browser support: All modern browsers.

Use SVG for:

• Logos (the single most important use case)
• Icons in UI/design systems
• Charts and diagrams
• Illustrations with clean geometric shapes
• Any image that needs to look sharp at multiple sizes (retina displays, print, large-format)

Don't use SVG for:

• Photographs (cannot be meaningfully described as vectors)
• Complex illustrations with photorealistic shading
• Any case where the SVG file would be larger than the raster equivalent

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Quick reference: which format to choose

Image type	Recommended format
Photograph for web	WebP (JPG as fallback)
Logo / brand asset	SVG (PNG if SVG unavailable)
Screenshot with text	PNG
Icon	SVG or PNG
Product shot with transparency	WebP or PNG
Social media image	JPG or WebP
Large background image	WebP
Print (300 DPI+)	TIFF or PNG (JPG at quality 95+)

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FAQ

What's the difference between JPG and JPEG? Nothing — they're the same format. JPEG stands for Joint Photographic Experts Group (the committee that created it). .jpg is used on Windows because older versions of Windows required three-letter file extensions; .jpeg is the technically correct extension. Both work identically.

Can I convert PNG to JPG without losing quality? Converting a PNG to JPG applies lossy compression for the first time — some quality is lost on conversion. The amount depends on the quality setting you use. Converting back to PNG doesn't restore the lost quality — the artifacts from the JPG compression remain.

Why is my PNG so much bigger than my JPG? Because PNG is lossless — it preserves every pixel exactly. Photographs have millions of subtly different pixel colors that don't compress well losslessly. JPG achieves smaller sizes by discarding the least perceptible color differences. For photos, JPG and WebP are always smaller.

When should I use WebP instead of JPG? Always on the web, unless you need compatibility with very old browsers or software. WebP is smaller, supports transparency, and is now universally supported in browsers. The only reason to use JPG instead is compatibility with specific tools or platforms that don't accept WebP.

What does "lossless" mean for image compression? Lossless means no data is discarded — the original pixel values are perfectly reconstructed when the file is opened. PNG and WebP lossless use algorithms that rearrange and represent pixel data more efficiently without throwing anything away. Lossless files are always larger than lossy equivalents.