My feeds URL in JSON format.but i see only last 20 post.how i get my all post using json format ?
You can use https://graph.facebook.com/397319800348866/feed?limit=100 (or whatever number you want) for getting this. Unfortunately facebook changed it so you will need an access token to do this. Which is easyly obtained by fetching https://graph.facebook.com/oauth/access_token?type=client_cred&client_id=APP_ID&client_secret=APP_SECRET
There is a good tutorial on the whole process here: https://illuminatikarate.com/blog/facebook-graph-api-requires-access-token-for-feed-access/