Web Image Optimizer
Lean webpages start with lean images. WebP and AVIF compression, right in your browser, even for iPhone HEIC photos. Completely free, no watermark.
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Frequently asked questions
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Nope! Your browser compresses every image on your own device. Your images never leave your computer or phone, so nobody else can see them.
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It is free, with no sign-up and no watermark. You can add up to 200 images at a time, as files, folders, or a zip. Very large batches, or files larger than 50 MB, can slow down the tab, so be mindful of overall batch size.
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Choose WebP for small files that compress fast and that all major browsers support. Choose AVIF for the smallest files, but it is slow to compress and some older browsers don't show it. Choose Keep original when your CMS only takes JPEG or PNG. Each file is compressed in its original format, with the exception of HEIC files, which are skipped because no browser can write HEIC.
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Start at 80. At 80, every image we tested scored high quality on SSIMULACRA2, a metric that predicts what people see. Above 80, files get larger for detail that few people notice.
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Only for large images, and you can turn it off. By default, an image with a side over 2560 pixels is scaled down until its longest side is 2560 pixels, and it keeps its aspect ratio. WordPress uses the same limit for uploads. If a scaled JPEG, PNG, or WebP comes out bigger than the original, you get the original instead. Smaller images keep their dimensions. To keep every image at full size, uncheck 'Resize large images'.
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Yes. Choose WebP or AVIF to convert HEIC photos to a web format. 'Keep original' skips HEIC files, since no browser can write HEIC.
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Yes. The compressor keeps only the pixels and a small color profile, so the compressed images do not carry camera details or GPS location.
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No. Wide-color photos, such as those from an iPhone, keep their vivid Display P3 colors. Images with another color profile, such as Adobe RGB, ProPhoto RGB, or BT.2020, are converted to Display P3, so their colors stay close to the original. All other images are saved as standard sRGB.
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Yes. HDR AVIF, HEIC, and PNG images in PQ or HLG are tone mapped for standard screens, so they do not look gray or washed out. For an AVIF with a gain map, you get the standard image that the gain map describes. For AVIF, both match what Chrome shows on a standard screen. The output is a standard dynamic range (SDR) image, so it does not get brighter on an HDR screen.
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Images are often the largest files on a page. Smaller images load sooner, which improves perceived loading speed of your site.