How to use it
- Drop an image on the box, click to choose one, or paste one from the clipboard.
- Set the Width (leave it blank to keep the original size) and drag Quality.
- Check the preview and file size, then Download the JPEG or copy it as a data URI.
About
JPEG is the most widely accepted photo format, and usually much smaller than PNG for photographs. This redraws your image and saves it as a JPEG, so you can see exactly how quality and size trade off before you download.
Quality around 75–85 is a good balance for photos on the web. Below about 50, blocky artefacts start to show. JPEG has no transparency, so transparent areas are filled with the Background colour.
The data URI is the whole image as text, for embedding small images directly in HTML or CSS. Everything happens in your browser and nothing is uploaded.
Questions
Will converting a JPEG again make it worse?
Yes, a little each time. Keep your original and convert from that.
Which formats can I convert from?
Anything your browser can open, usually PNG, WebP, GIF, BMP, AVIF and, in Safari, HEIC.