How to convert JPG to WebP
- Drop your JPG or JPEG photos onto the box above, click to browse, or paste from your clipboard.
- Set the WebP quality slider, 85% keeps photos looking identical while trimming size significantly; nudge it up for portfolio work.
- Download the WebP files one by one, or use Download all to grab the whole set at once.
Why convert JPG to WebP?
JPG has been the workhorse photo format since the 1990s, and it's still perfectly good, but it's a thirty-year-old algorithm. WebP applies newer compression to the same photograph and lands roughly 25-50% smaller at a quality your eye can't distinguish. A 1.2 MB JPG often becomes a 600-800 KB WebP. That's a smaller jump than converting a bulky PNG, simply because JPG is already lossy and fairly efficient, WebP just does the job better.
Where this pays off is anything that loads over a network: a photography portfolio, an e-commerce catalogue full of product shots, a blog's featured images, or a gallery. Shave a third off every photo and pages render faster, Google's PageSpeed and Core Web Vitals scores climb, and visitors on mobile data spend less of it to see your work. Every current browser displays WebP natively, so there's no compatibility downside on the web.
One habit worth keeping: hold on to your original JPGs. The WebP is a brand-new lossy copy, so if you ever need to re-crop or re-export at a different size, going back to the original avoids re-compressing an already-compressed file and stacking artifacts.
How WebP squeezes a photo smaller than JPG
Both formats are lossy, so why does WebP win? It comes down to smarter prediction. JPG divides an image into 8x8 blocks and compresses each largely on its own. WebP borrows techniques from modern video coding, it predicts each block from its neighbours and only stores the difference, and it uses more flexible block sizes and a better final entropy-coding stage. The upshot:
- Fewer visible blocks in skies, skin and gradients, where JPG tends to show banding.
- More detail per kilobyte, so you can drop the file size before quality visibly suffers.
- Optional transparency, which JPG never had, handy if a photo has been cut out.
Need the file to open in older desktop software instead of a browser? Convert it back to JPG in a click.
Frequently asked questions
How much smaller is WebP than JPG?
For photographs, WebP typically comes out 25-50% smaller than a JPG of the same visual quality, a 1.2 MB JPG might land around 600-800 KB. The saving is real but more modest than converting a PNG, because JPG is already a lossy, reasonably efficient format; WebP simply does the same job with a newer algorithm.
Will my photos lose quality converting JPG to WebP?
At the default 85% the difference is practically invisible; side by side, most people can't tell. Because you're re-compressing an already-compressed JPG, keep the slider at 80% or above to avoid stacking artifacts, and push toward 100% for portfolio-grade images.
Do all browsers support WebP?
Yes. Chrome, Firefox, Safari and Edge have all supported WebP for years, on desktop and mobile, so you can serve it site-wide. For the rare ancient browser, the standard trick is a picture element with a JPG fallback source.
Should I keep the original JPGs?
Yes, archive them. The WebP is a fresh lossy copy, so if you later need to re-edit or re-export at a different size, starting again from the original JPG avoids compounding compression across generations.
Is WebP good for photos specifically, or just graphics?
Both, but this tool is tuned for photos. WebP's lossy mode is a direct upgrade path from JPG for continuous-tone images like photographs, which is exactly this case. For flat graphics and screenshots, converting a PNG to WebP usually shows even bigger savings.
Are my photos uploaded?
No. Each JPG is decoded and re-encoded as WebP by your browser, entirely on your device. Nothing is uploaded, so it's safe for client work and personal photos, and there's no limit on how many you convert.