Convert between PNG, JPG and WebP both ways — without uploading anything. Add one image or many, pick a target format and quality, then download each file or the whole batch as a ZIP. Nothing leaves your device.
This tool converts image formats. If you need to pull text out of images and screenshots, or create, edit, merge and split PDFs and process whole folders at once, Kaizen OCR & PDF for Windows does it all — fully offline and private.
Changing an image's format takes just a few seconds, and everything happens right here in your browser:
Most online "image converter" sites upload your photos to their servers to do the work. This one doesn't. It draws each image to an HTML canvas and re-encodes it with canvas.toBlob in your chosen format directly in your browser, so your files never leave your device — you can even disconnect from the internet after the page loads and it still works. For heavier, repeatable jobs on Windows — OCR on images and screenshots, or creating, editing and merging PDFs across folders of files — try Kaizen OCR & PDF.
No. The conversion happens entirely inside your browser using the HTML canvas and the canvas.toBlob method. Your images never leave your device and are never sent to any server, so private photos and documents stay completely private.
You can convert any image your browser can open — including PNG, JPG/JPEG and WebP — into PNG, JPEG or WebP. That covers the common cases like PNG to JPG, JPG to PNG, PNG to WebP, WebP to PNG and WebP to JPG. For JPEG and WebP you also get a quality slider to balance size against fidelity.
JPEG does not support transparency, so any transparent areas are flattened onto a solid white background during conversion. If you need to keep transparency, convert to PNG or WebP instead, both of which preserve the alpha channel.
Yes — completely free and unlimited, with no signup and no watermarks. It runs locally in your browser, so you can convert as many images as you like.