This is because JPEG is not a native file format in Photoshop. Photoshop can open and edit JPEGs, but it cannot save images as JPEGs. To save an image as a JPEG, you will need to use a third-party software application or convert the image to another file format such as PNG or TIFF.
How do I save a PSD file as a JPEG?
Click the Format menu, then choose the desired file format. In our example, we'll save this image as a JPEG file.
How do I save a PSD file as JPEG in Photoshop 2022?
Try restarting Photoshop and see if that solves the problem. If not, you may need to uninstall and reinstall the software. The most common reason why a Photoshop file won't save is because the document size is too large. If your document exceeds 300,000 pixels in either dimension, you will not be able to save it.