JPG vs PNG vs WebP vs AVIF — Which Image Format Should You Actually Use?
You've got a photo and need to save it. JPG? PNG? WebP? That new AVIF thing? Five years ago this was a simple question — JPG for photos, PNG for graphics. In 2026, it's genuinely more complicated because the newer formats are better in almost every measurable way, but "better" doesn't always mean "use this everywhere."
The Honest Truth About Each Format
JPG (JPEG) is the format your parents use without knowing its name. Created in 1992, it's been the default photo format for three decades. Every device, every browser, every app on earth opens JPGs. It uses lossy compression — meaning it throws away some image data to reduce file size. At high quality settings (85-95%), the difference is invisible to most people. At low quality, you get those characteristic "blocky" artifacts around edges.
Image Formats — Quick Comparison
JPG: Photos, universal support, lossy, ~100-500 KB typical
PNG: Graphics/logos/screenshots, lossless, supports transparency, larger files
WebP: 25-35% smaller than JPG/PNG, broad browser support, Google-backed
AVIF: 50% smaller than JPG, best quality-to-size ratio, limited support
PNG is the format designers love. It uses lossless compression — no data is lost, ever. This matters for two reasons: transparency support (JPG can't do transparent backgrounds) and text sharpness. Screenshots, logos, graphics with text, anything with sharp lines — PNG handles these perfectly. The trade-off is file size: a PNG can easily be 5-10x larger than a JPG of the same photo.
WebP is Google's answer to "what if JPG and PNG had a baby?" It supports both lossy and lossless compression, handles transparency, and typically produces files 25-35% smaller than equivalent JPGs. Browser support hit 95%+ in 2023, so the old compatibility excuse is basically gone. If you're serving images on the web, WebP is the practical choice right now.
AVIF is the newest contender, based on the AV1 video codec. In pure compression efficiency, it beats everything else — roughly 50% smaller than JPG at the same visual quality. It supports transparency, HDR, and wide colour gamut. The downside? Encoding is slow (noticeably slower than WebP), and browser support, while good, isn't quite universal yet. Safari only added full support recently.
Practical Decision: Photos and Camera Images
For photographs — vacation photos, product images, portraits — you want lossy compression because these images have smooth gradients and lots of colour variation. JPG works perfectly if compatibility is your priority. If you're putting these on a website, WebP cuts your bandwidth by 30% with zero visible difference. AVIF saves even more but takes longer to encode.
Real-world example: a 1920x1080 photo of a landscape might be 450 KB as a quality-90 JPG, 320 KB as WebP, and 200 KB as AVIF. Same visual quality across all three — the difference is purely in file size. For a website loading 20 images, that's the difference between 9 MB and 4 MB of image data. Your users on 4G connections will notice.
Practical Decision: Graphics, Logos, Screenshots
For images with sharp edges, text, flat colours, or transparency, the game changes. PNG is still the safe default — guaranteed lossless quality, universal support, and transparency. WebP lossless gives you the same quality at roughly 26% smaller file size. AVIF lossless also works but offers less savings than lossy AVIF.
Never use JPG for screenshots with text, logos, or UI mockups. Lossy JPG compression creates visible artifacts around sharp colour transitions — text looks blurry, straight lines get wavy. That's not a quality setting issue; it's a fundamental limitation of how JPG compression works.
What About HEIC?
If you're an iPhone user, you might be wondering where HEIC fits in. HEIC is Apple's default photo format, and it's roughly 50% smaller than JPG with similar quality. But here's the problem: web browsers other than Safari largely don't support it. Windows needs a plugin to view it. Most online forms reject it. HEIC is great for storing photos on your iPhone, but the moment you need to share or upload, you'll be converting it to JPG or WebP.
My Recommendation for 2026
For websites: serve AVIF with a WebP fallback and JPG as the final safety net. Most modern content management systems and CDNs handle this automatically. For documents and forms: stick with JPG — it's what every upload form expects. For design work: use PNG during the editing process, export as WebP or AVIF for delivery. For archiving: keep the original format (usually JPG or RAW from your camera). Don't convert between lossy formats repeatedly — each conversion degrades quality slightly.
The format wars will continue. JPEG XL is waiting in the wings, and there'll probably be something new next year. But right now, the practical answer for most people is: JPG for compatibility, WebP for modern web use, PNG when you need transparency or lossless quality. If you need to switch between any of these, an image converter gets it done in seconds without installing anything.
File Size Comparison — Same Image, Different Formats
Numbers tell the story better than words. Take a typical 1920 × 1080 photograph and save it in each format at comparable visual quality. JPG at quality 85: ~250 KB. PNG (lossless): ~2.5 MB. WebP at equivalent quality: ~180 KB. AVIF at equivalent quality: ~130 KB. That means AVIF is roughly half the size of JPG with visually identical results, and about 30% smaller than WebP.
For a graphic or screenshot with text and flat colours, the numbers shift. PNG: ~150 KB. JPG at quality 90: ~200 KB (and with visible artifacts around text). WebP lossless: ~100 KB. AVIF lossless: ~90 KB. This is why PNG is preferred for graphics — JPG actually produces larger files AND lower quality for this type of content.
Browser and Platform Support in 2026
JPG and PNG work everywhere — every browser, every app, every device, going back decades. WebP now has near-universal browser support: Chrome, Firefox, Safari (since 2022), Edge, and all mobile browsers support it. The only holdouts are some very old enterprise systems and email clients.
AVIF support is growing but not yet universal. Chrome, Firefox, and Opera support it fully. Safari added AVIF support in 2023, but some older iOS devices still don't handle it. If you're building a website, the safe approach is to serve AVIF with WebP fallback and JPG as the final safety net using the HTML
<picture> element.Converting Between Image Formats
Converting from lossless to lossy (PNG → JPG, PNG → WebP) is perfectly safe — you're just choosing a compression level. Converting lossy to lossy (JPG → WebP) works fine for a single conversion but introduces slight quality loss. Never convert back and forth between lossy formats repeatedly — each conversion degrades quality further, like photocopying a photocopy.
If you need to convert images between formats, convert PNG to JPG, convert HEIC to JPG, or use our other conversion tools — all free and instant in your browser.
When to Use Each Format — Summary
Use JPG when: sharing photos via email, uploading to social media, or when universal compatibility matters more than file size. Use PNG when: the image has transparency, contains text or sharp edges, or you need lossless quality for editing. Use WebP when: optimizing images for your website — it's the best balance of quality, file size, and browser support. Use AVIF when: you need maximum compression and can provide fallbacks for older browsers.
Convert Between Image Formats
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