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[exiftool](https://exiftool.org/)

It's available as a standalone application for Windows, and in package distributions for Linux. You can remove all EXIF data from a JPEG with

    exiftool -all= path/to/file.jpg

or you can be more fine-grained in the tags you choose to remove.

The option `-ext jpg` will cause it to process all `.jpg` files in the current directory, and you can combine that with `-r` for recursive processing.

(It also has some clever features around replacing tags with values taken from a  config file, which I use for setting lens information on photos taken with my non-electronic lenses).