Image Compressor
Shrink images and convert between WebP, AVIF, JPEG and PNG without uploading anything. Drop in a batch, pick a quality, and download the results — all the work happens inside your browser.
Best all-round choice — much smaller than JPEG or PNG, supported everywhere that matters.
Drop images here
PNG, JPEG, WebP, AVIF, GIF or BMP · up to 30.00 MB each · 20 at a time
What you can do
- Cut page weight. Convert photographs to WebP or AVIF and typically save a third or more with no visible difference.
- Work in batches. Drop in up to 20 images and re-encode them all with the same settings.
- Resize while you compress. Cap the longest edge so a 4000px camera photo stops being served to a 400px thumbnail.
- See the trade-off. Every image shows its before and after size and the percentage saved, so you can tune quality with evidence.
- Keep private work private. Nothing is uploaded, so client screenshots and unreleased assets never leave your machine.
Why image size matters
Images are usually the largest thing a page downloads, and Largest Contentful Paint — one of Google's Core Web Vitals — is most often an image. Converting to a modern format and serving something close to the size it will actually display is the single cheapest performance win available on most sites.
Frequently asked questions
Are my images uploaded to a server?
No, and this is the main difference from most online compressors. Your images are decoded and re-encoded by your own browser using the canvas API. Nothing is transmitted, so you can safely compress private photos, screenshots containing customer data, or unreleased design work.
Which format should I choose?
WebP is the right default for the web — typically 25–35% smaller than JPEG at the same visual quality, with support in every current browser. AVIF is smaller still but slower to encode. Keep PNG only when you need lossless quality or transparency, such as logos and flat-colour graphics.
What quality setting should I use?
Around 80% is the usual sweet spot: large savings with no difference most people can see. Photographs tolerate lower settings than screenshots or images containing text, where compression artefacts show up around sharp edges.
Why did my file get bigger?
Converting an already-compressed photo to PNG will almost always enlarge it, because PNG is lossless. Re-encoding a small, heavily optimised image can also add a few bytes. If the result is larger, the original was already the better file.
Does compressing lose quality?
WebP, AVIF and JPEG are lossy, so some data is discarded — that is what makes the file smaller. PNG is lossless and discards nothing. Either way, this tool never modifies your original file; it produces a new one for you to download.
Will resizing rotate my phone photos?
No. Photos carry an EXIF orientation flag, and the tool applies it while decoding, so pictures taken in portrait stay upright rather than coming out sideways.
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