org-eww-mode is a minor mode for Org-Mode that automatically use eww to preview current org-file when save.
Insert the following into your ‘.emacs’ file:
(add-hook 'org-mode-hook 'org-eww-mode)
On opening Org-Mode file, press ‘C-c M-p’ to turn on preview at save, then everytime current org-file saved, an eww buffer will show the exported html file. ‘C-c M-P’ to turn off.
Alternatively, execute the command `org-eww-turn-on-preview-at-save’ to turn on this feature, and use the command `org-eww-turn-off-preview-at-save’ to turn off.