JPG · PNG · WebP · AVIF · GIF · BMP
Up to 100 images, max 20 MB eachOn-device processing · No cookies · GIF: first frame onlyNo images in the queue yet.
Create AVIF copies for website photos and product images. Compare file size and detail on a few samples before converting the full batch.
This page exports AVIF from JPG, PNG, WebP and other supported images. Keep original dimensions or scale down, adjust quality and retain existing transparency.
Try images with lettering, texture and transparent edges. AVIF encoding generally takes more computation. Review file size and detail, then confirm your website can upload and display the result.
Images are processed without uploading the originals, and results are created as new files. The queue is temporary, so download what you need before leaving or refreshing.
Warning: refreshing clears all files in the current queue!Unsaved results will also be lost. Download them first. Original files on your device are unaffected.
Keep product details clear while reducing the wait to browse, add to cart and buy.
−90%
For example, reducing a 1 MB image to 100 KB cuts its size by about 90%. The browser has fewer bytes to download, which can reduce image loading time.
Google image performance guide · 90% is an illustration; actual reduction varies by image.
+8.4%
A Google-commissioned study by Deloitte and 55 observed an 8.4% relative increase in retail conversion rates when four speed metrics improved by 0.1 seconds on every page of the mobile shopping journey.
Milliseconds Make Millions, 2020 · 37 brand sites and over 30 million sessions.
A 90% smaller image does not mean a 90% faster page or a fixed conversion gain per second. The study measured site-wide speed improvements, not image compression alone. Check the published page and your store data to measure the benefit.
No. Source images, quality and dimensions all affect the result. Compare actual file size and detail for the same image rather than choosing by format alone.
Encoding generally needs more computation. Processing time depends on dimensions, batch size and your device. Keep the page open until the queue finishes; try a few images first.
Choose the JPG output page. This page creates AVIF files. To convert AVIF into PNG or WebP, choose the corresponding output instead.
Normal mode generates results first. Then choose Download image or Download ZIP. A download request does not confirm a file is on disk; check your browser's download list. Authorized folder writes show Saved after completion.
Writing to a folder needs browser support and your permission. Use browser downloads when folder access is unavailable. Original files are not overwritten.
The queue lives in the current page session. Download the results before leaving; after a refresh, import the images again.
No. Results use new filenames. Authorized folder writes also avoid replacing existing files with the same name.
Add up to 100 images, at most 20 MB each. JPG, PNG, WebP, AVIF, GIF and BMP are supported; GIF uses the first frame only. Batch settings are shared while each image keeps its proportions.
The tool uses format, quality and dimensions rather than a fixed byte target. Adjust settings based on the result; reduction varies between images.
Images are processed in your browser without uploading their contents to SellerImg. There are no analytics cookies; anonymous usage counts do not include image contents or filenames.
Image processing and ZIP export are free. No account or subscription is needed.
