// quick start
// convert to
82
smaller file75–85 is the sweet spotsharper
#ffffffJPEG has no transparency
pxneed exact sizes or crops? use the image resizer
Images
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Convert to
JPEG
Quality
82
Total
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Image Converter(1)
Name
Convert images between JPEG, PNG, WebP and AVIF. See exactly how big each format would be, convert a whole batch, and download a zip — nothing is uploaded.
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Guide
How do I convert an image to another format?
Choose the format you want under Convert to — WebP, JPEG, PNG or AVIF — then drop your images onto the box, pick files, or paste a screenshot with Ctrl+V / ⌘V. Each image is converted straight away and listed with its old and new format and file size. Select an image to preview it and to see a size comparison across every format. Download files one at a time, or all of them as a single .zip.
Which image format should I convert to?
For photos on a website, WebP is the best default: roughly 25–35% smaller than JPEG at the same visual quality, with transparency support and acceptance in every current browser. AVIF shrinks photos further still, but encodes slowly and is not yet accepted by every upload form. JPEG is the format to send when compatibility matters most — email, Office documents, printers, older software. PNG is lossless, so use it for screenshots, diagrams, logos and anything with text or hard edges.
How do I convert PNG to JPG without a black background?
JPEG has no transparency, so transparent pixels must be filled with a colour when you convert. Some tools fill them with black, which ruins logos and icons. This converter fills transparent areas with the background colour you choose — white by default — whenever the output is JPEG. If you need to keep the transparency, convert to WebP or PNG instead; both preserve the alpha channel exactly.
Is converting JPEG to WebP or AVIF worth it?
Usually, yes — for images you serve on the web. Smaller images load faster, use less mobile data and improve Largest Contentful Paint, a Core Web Vitals metric. The Compare formats panel shows the real size of your own image in every format at the current quality, so you can see the saving rather than guess. Converting a JPEG does not recover detail it already lost, though, so keep your original files and convert copies for publishing.
Can I convert HEIC photos from an iPhone?
Only where the browser itself can decode HEIC, which currently means Safari on macOS and iOS; Chrome and Firefox cannot open HEIC files, and this tool tells you when that happens. On an iPhone you can avoid HEIC entirely with Settings → Camera → Formats → Most Compatible, and AirDrop or mail usually converts to JPEG automatically. On Linux, install libheif's tools (libheif-examples on Debian and Ubuntu) and run heif-convert photo.heic photo.jpg.
Does converting an image reduce its quality?
Converting to PNG never does — PNG is lossless. JPEG, WebP and AVIF are lossy: they discard detail the eye is unlikely to notice, and the quality slider controls how much. Quality 75–85 for JPEG and WebP, or 55–70 for AVIF, looks the same as the original for most photos. Each additional lossy re-save loses a little more, so convert from the best original you have rather than from an already-compressed copy.
How do I convert images on the Linux command line?
ImageMagick converts by file extension: magick in.png out.webp, or magick in.png -quality 85 out.jpg; mogrify -format webp *.png converts a whole folder. Google's cwebp -q 80 in.jpg -o out.webp is the reference WebP encoder, and avifenc -q 60 in.png out.avif (from libavif) produces AVIF. For HEIC use heif-convert, and for very large batches libvips is far faster: vips copy in.jpg out.webp[Q=80]. Add -strip in ImageMagick to drop EXIF metadata the way this tool does.
Are my images uploaded? What happens to EXIF data?
Nothing is uploaded. Images are decoded and re-encoded on a canvas in your own browser tab, so they never leave your device — you can confirm it in your browser's network tab. Because each image is re-drawn, the output contains no EXIF metadata: camera model, timestamps and GPS location are removed, which is worth knowing before you share photos publicly. The photo's rotation is applied to the pixels first, so pictures stay the right way up.