Convert and compress images without uploading them
WebP, AVIF, JPEG and PNG, converted or just made smaller, entirely in your browser. No upload, no file size limit, no watermark, no sign-up — and your EXIF data survives the trip.
Nothing leaves your machine
The encoders run as WebAssembly inside the page. There is no upload step and no server holding your photos, which is also why there is no size cap.
Your metadata survives
EXIF, ICC colour profiles and XMP are copied across byte for byte — including maker notes and vendor tags that most converters quietly discard.
Proper encoders
libwebp, libaom, MozJPEG and OxiPNG — the same codecs behind the command line tools, with trellis quantisation and Lanczos3 resampling.
Common conversions
Frequently asked questions
- Are my images uploaded to a server?
- No. Every conversion runs inside your browser using WebAssembly builds of the same encoders desktop tools use. Your files never leave your device. You can confirm it by opening your browser's network tab while converting, or by disconnecting from the internet once the page has loaded and converting anyway.
- Is there a file size or file count limit?
- No. There is no server paying for your bandwidth, so there is nothing to meter. The only real limit is your own machine's memory. Files are processed in parallel across your CPU cores.
- Which format should I convert to?
- WebP for almost everything — it is 25-35% smaller than JPEG, supports transparency, encodes quickly and works in every current browser. Choose AVIF when file size matters more than encoding speed and you can live with Safari 16+ support. Keep PNG for screenshots and line art that must stay pixel-exact.
- Does this keep EXIF data and colour profiles?
- Yes, for JPEG, PNG and WebP output. EXIF, ICC colour profiles and XMP are copied across verbatim, so camera settings, copyright and colour accuracy survive — including maker notes that most converters discard. AVIF metadata writing is not supported yet. You can turn preservation off to strip metadata before publishing.
- Is it really free?
- Yes, with no account, no watermark and no paid tier. Because the work happens on your machine rather than a server, running this costs essentially nothing, so there is nothing to charge for.
- Can I convert a whole folder at once?
- Yes. Drop as many files as you like, convert them in one pass, and download the results individually or as a single ZIP. For genuinely huge local batches, the companion command line tool is linked in the footer.