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

"Should I save this as JPG, PNG, or WebP?" comes up every time you save a screenshot, export a logo, or upload an image to a website. Pick wrong and you get a blurry photo, a 4 MB icon, or an image that doesn't display in older browsers. Pick right and the same picture is sharper and a quarter the size.

This guide is a no-fluff decision tree. We'll cover what each format is actually good at, when to switch from one to another, and what the real-world file-size difference looks like.

The two-second decision

If you only read one section, this is it:

• Photograph or photo-like screenshot? → JPG (or WebP if your platform supports it)
• Logo, icon, screenshot of UI, or anything with sharp text/edges? → PNG
• Image that needs transparency? → PNG (or WebP)
• Web image where every kilobyte matters and you control the audience's browsers? → WebP
• Email attachment, print, or "I have no idea who will open this"? → JPG (universally supported)

The rest of this article explains why — and where the decisions get less obvious.

JPG (JPEG) — the format for photographs

JPG uses lossy compression: it throws away visual information your eye is unlikely to notice, then aggressively packs what's left. It's ruthless on smooth gradients (skies, skin, fabric) — exactly the kind of content photographs are full of. A 5 MB camera RAW becomes a 600 KB JPG with no human-visible quality difference.

JPG is terrible at:

• Sharp edges. Look at any JPG of black text on a white background and you'll see colored "ringing" artifacts around each letter.
• Solid blocks of color. What looks like #FFFFFF in your design tool becomes a slightly noisy near-white in the JPG.
• Transparency. JPG has no alpha channel. Where you'd see "see-through" you get a solid color — usually white.
• Repeated saving. Every time you re-save a JPG you lose more quality. Always edit from the original and export to JPG once.

That said, for the right content, JPG is unbeatable on size-to-quality and works in literally every viewer ever made. If you need to compress an image to 50 KB or 100 KB for an online application, JPG at 60–70% quality is almost always the answer.

PNG — the format for graphics, screenshots, and transparency

PNG is lossless: every pixel comes back exactly as you saved it. That's perfect for content where one wrong pixel is visible — UI screenshots, logos, diagrams, anything with hard edges or text rendered into the image.

PNG also supports a real alpha channel. That's why every app icon, every "transparent background" Photoshop export, and every product cutout you see online is a PNG.

The cost of all this is file size. A 1920×1080 photograph saved as PNG can easily be 3–4 MB; the same photo as JPG at quality 80 is 250–400 KB. Don't save photos as PNG. The lossless guarantee is wasted on content where lossy compression is invisible.

PNG-8 vs PNG-24: PNG-8 caps at 256 colors and is much smaller. For simple graphics with limited palettes (logos with one or two colors, monochrome icons), PNG-8 can rival WebP. Most design tools default to PNG-24 — switch to PNG-8 manually for these cases.

WebP — the modern compromise

WebP is Google's image format. It supports both lossy compression (like JPG, but better) and lossless compression with transparency (like PNG, but smaller). On real-world content, WebP is typically:

• 25–35% smaller than JPG at the same visual quality.
• 20–30% smaller than PNG for graphics and screenshots.

WebP support as of 2026 is essentially universal in modern browsers — Chrome, Firefox, Safari (since Big Sur / iOS 14), Edge, Opera. Where it still falls down:

• Email clients. Outlook, Gmail's web view, and Apple Mail render WebP, but a lot of older corporate email clients (and embedded webviews in older mobile apps) still don't.
• Image upload forms. Many job application systems, government portals, and academic submission systems whitelist JPG/PNG and reject WebP.
• Photoshop and older design tools. Modern versions handle WebP natively; older ones need a plugin.

The practical rule: use WebP for your own website and images you control the consumption of. For uploads, attachments, and assets you'll send to other people, stick to JPG/PNG. The WebP Converter goes both ways — JPG/PNG to WebP for sites you own, and WebP back to JPG/PNG for files you've received but need in a more compatible format.

A real-world side-by-side

The same source image — a 4032×3024 phone photograph of a city skyline — saved at perceptually equivalent quality in each format:

• JPG (quality 85): ~1.6 MB
• PNG (lossless): ~14 MB
• WebP (quality 85): ~1.1 MB

The same 1920×1080 screenshot of a code editor (sharp edges, lots of solid color):

• JPG (quality 90): ~480 KB, with visible ringing around the text
• PNG-24: ~280 KB, pixel-perfect
• WebP (lossless): ~190 KB, pixel-perfect

Notice the inversion: for the photo, JPG beats PNG by 10×. For the screenshot, PNG beats JPG and WebP wins overall. This is the whole reason "use the right format for the content" matters.

Common conversion paths

A few day-to-day workflows you'll bump into:

• Phone photo too big to upload? Stay JPG, just compress it to a smaller size or quality. Don't convert to PNG.
• Designer sent you a giant PNG of a photo? Convert it to JPG. You'll keep the visible quality and lose 80–90% of the file size.
• Need transparency on a JPG you already have? You can't recover it — JPG never had alpha. You'd have to re-cut the subject in an editor and export PNG/WebP.
• Building a website and want fast page loads? Convert all your photos and graphics to WebP with a JPG/PNG fallback in your <picture> tags.
• Got a WebP from a website but need to upload to a JPG-only form? Convert WebP back to JPG or PNG.

Quality settings — what those numbers actually mean

JPG and WebP both have a "quality" slider, usually labeled 0–100. The number is not a percentage of anything physical. It's a parameter to the encoder that controls how aggressive the lossy step is. Loose guide:

• Quality 95–100: Visually indistinguishable from lossless. Used by photographers archiving from RAW. File size is barely smaller than PNG.
• Quality 85: The sweet spot for photographs. No human notices the difference; file is ~30% of quality 100.
• Quality 70: Good for web content where you'll see the image at small to medium size. Slight softening on close inspection.
• Quality 50: Visible compression artifacts on smooth gradients but still readable for text-heavy content like scanned documents. Useful when you need to compress a scanned PDF to under 100 KB.
• Quality 30 or below: Visibly bad. Only useful for thumbnails or as a deliberate aesthetic choice.

Quick format summary

A condensed reference:

• JPG: photos, universal compatibility, no transparency, lossy-only.
• PNG: graphics/screenshots, transparency, universal compatibility, lossless-only, larger files.
• WebP: all of the above, smaller, modern browsers only, picky on legacy form submission.
• HEIC / AVIF: even smaller than WebP, but support is spotty enough in 2026 that they're mostly used in their native ecosystems (Apple Photos for HEIC; high-end web for AVIF).

Closing — picking once, forever

Set yourself a one-line rule: "Photographs are JPG. Graphics with text or transparency are PNG. My own websites are WebP with JPG/PNG fallbacks." Stick to it and you'll never spend more than a second on this decision again.

Faster-loading images improve website performance, which directly impacts your search rankings and conversion rates. Our guide on measuring ROI for your website investments explains how to calculate the return on optimizing your site speed and assets.

When you do need to convert, our browser-side image tools handle every direction without uploading a single byte to a server.