Not every Canva export needs to be a lossless PNG. In fact, for many of the most common use cases (posting to Instagram, embedding in an email newsletter, uploading to a website), JPG is the smarter choice. JPG files are typically 3-5x smaller than equivalent PNGs, which means faster upload times, lower bandwidth costs, and snappier page loads for your audience.
The trade-off with Canva JPEG export is compression: JPG uses lossy compression that discards some visual data to achieve smaller files. At high quality settings (which DesignExporter uses by default), the difference is virtually invisible to the human eye. A 1080x1080 Instagram post at high-quality JPG might be 200KB versus 800KB as PNG. Your followers will never notice the difference, but your upload speed will.
The problem, as always, is doing this at scale. If you manage social media for multiple clients, run a content marketing operation, or maintain a product image library, exporting each Canva design as JPG one at a time is painfully slow. A bulk JPG download from Canva through DesignExporter lets you export your entire content calendar or product catalog in a single batch.