diff --git a/app.js b/app.js
index 004465f..bfdd898 100644
--- a/app.js
+++ b/app.js
@@ -131,6 +131,12 @@ const preferencesMiddleware = (req, res, next) => {
     }
   }
   
+  let collapseChildComments = req.query.collapse_child_comments
+  if(collapseChildComments) {
+    req.cookies.collapse_child_comments = collapseChildComments
+    res.cookie('collapse_child_comments', collapseChildComments, { maxAge: 31536000, httpOnly: true })
+  }
+  
   next()
 }
 
diff --git a/inc/compilePostComments.js b/inc/compilePostComments.js
index 1f0da40..2f21e79 100644
--- a/inc/compilePostComments.js
+++ b/inc/compilePostComments.js
@@ -1,5 +1,5 @@
 module.exports = function() {
-  this.compilePostCommentsHtml = (comments, next_comment, post_id, post_url, morechildren_ids, post_author, viewing_comment) => {
+  this.compilePostCommentsHtml = (comments, next_comment, post_id, post_url, morechildren_ids, post_author, viewing_comment, user_preferences) => {
     return new Promise((resolve, reject) => {
       (async () => {
         let comments_html
@@ -10,6 +10,9 @@ module.exports = function() {
           else
             return `<a href="/u/${comment.author}" class="${classes}">${comment.author}</a>${submitter || ''}${moderator || ''}`
         }
+        
+        if(!user_preferences)
+          user_preferences = {}
 
         if(comments.author !== undefined && comments.body_html !== undefined) {
           let classlist = []
@@ -42,7 +45,7 @@ module.exports = function() {
           }
           comments_html = `
             <div class="comment ${comments.depth % 2 === 0 ? 'even-depth' : 'odd-depth'}" id="${comments.id}">
-              <details open>
+              <details ${user_preferences.collapse_child_comments === 'true' && comments.depth > 0 ? '' : 'open'}>
                 <summary>
                   <p class="author">${commentAuthor(comments, classlist, submitter && submitter_link, moderator && moderator_badge)}</p>
                   <p class="ups">${ups}</p>
@@ -138,7 +141,7 @@ module.exports = function() {
               }
               comments_html += `
                 <div class="comment ${comment.depth % 2 === 0 ? 'even-depth' : 'odd-depth'}" id="${comment.id}">
-                <details open>
+                <details ${user_preferences.collapse_child_comments === 'true' && comments.depth === 0 ? '' : 'open'}>
                   <summary>
                     <p class="author">${commentAuthor(comment, classlist, submitter && submitter_link, moderator && moderator_badge)}</p>
                     <p class="ups">${ups}</p>
@@ -164,7 +167,7 @@ module.exports = function() {
                     if(comment.replies[j+1]) {
                       next_reply = comment.replies[j+1]
                     }
-                    replies_html += await compilePostCommentsHtml(comment.replies[j], next_reply, post_id, post_url, null, post_author, viewing_comment)
+                    replies_html += await compilePostCommentsHtml(comment.replies[j], next_reply, post_id, post_url, null, post_author, viewing_comment, user_preferences)
                   }
                 }
               }
diff --git a/inc/processJsonPost.js b/inc/processJsonPost.js
index 9906181..0909246 100644
--- a/inc/processJsonPost.js
+++ b/inc/processJsonPost.js
@@ -198,7 +198,7 @@ module.exports = function(fetch) {
     })
   }
 
-  this.finalizeJsonPost = async (processed_json, post_id, post_url, morechildren_ids, viewing_comment) => {
+  this.finalizeJsonPost = async (processed_json, post_id, post_url, morechildren_ids, viewing_comment, user_preferences) => {
     let comments_html = `<div class="comments">`
     let comments = processed_json.comments
     for(var i = 0; i < comments.length; i++) {
@@ -206,7 +206,7 @@ module.exports = function(fetch) {
       if(comments[i+1]) {
         next_comment = comments[i+1]
       }
-      comments_html += await compilePostCommentsHtml(comments[i], next_comment, post_id, post_url, morechildren_ids, processed_json.author, viewing_comment)
+      comments_html += await compilePostCommentsHtml(comments[i], next_comment, post_id, post_url, morechildren_ids, processed_json.author, viewing_comment, user_preferences)
     }
 
     comments_html += `</div>`
diff --git a/routes.js b/routes.js
index 43f2ffe..92dce1a 100644
--- a/routes.js
+++ b/routes.js
@@ -133,7 +133,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
       }
       if(json) {
         json = JSON.parse(json)
-        if(fetched === 'true' || redis_key.includes('/comments/'))
+        if(fetched === 'true' || redis_key.includes('/comments/'))
           json = json[0]
         
         let post_to_save = false
@@ -235,7 +235,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
               return res.redirect(back)
             }
           })
-        } else {
+        } else {
           return res.redirect(`/saved`)
         }
       } else {
@@ -264,7 +264,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
       d = `&before=${before}`
     }
     
-    if(nsfw !== 'on') {
+    if(nsfw !== 'on') {
       nsfw = 'off'
     }
     
@@ -361,7 +361,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
             })
           } else {
             if(result.status === 404) {
-              console.log('404 – Subreddits not found')
+              console.log('404 – Subreddits not found')
             } else {
               console.error(`Something went wrong while fetching data from Reddit. ${result.status} – ${result.statusText}`)
               console.error(config.reddit_api_error_text)
@@ -486,11 +486,11 @@ module.exports = (app, redis, fetch, RedditAPI) => {
     if(!before) {
       before = ''
     }
-    if(restrict_sr !== 'on') {
+    if(restrict_sr !== 'on') {
       restrict_sr = 'off'
     }
     
-    if(nsfw !== 'on') {
+    if(nsfw !== 'on') {
       nsfw = 'off'
     }
     let d = `&after=${after}`
@@ -561,7 +561,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
       if(json) {
         console.log('Got frontpage key from redis.');
         (async () => {
-          if(api_req) {
+          if(api_req) {
             return handleTedditApiSubreddit(json, req, res, 'redis', api_type, api_target, '/')
           } else {
             let processed_json = await processJsonSubreddit(json, 'redis', null, req.cookies)
@@ -599,7 +599,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
                 } else {
                   console.log('Fetched the frontpage from Reddit.');
                   (async () => {
-                    if(api_req) {
+                    if(api_req) {
                       return handleTedditApiSubreddit(json, req, res, 'from_online', api_type, api_target, '/')
                     } else {
                       let processed_json = await processJsonSubreddit(json, 'from_online', null, req.cookies)
@@ -736,11 +736,11 @@ module.exports = (app, redis, fetch, RedditAPI) => {
       d = `&before=${before}`
     }
     
-    if(restrict_sr !== 'on') {
+    if(restrict_sr !== 'on') {
       restrict_sr = 'off'
     }
     
-    if(nsfw !== 'on') {
+    if(nsfw !== 'on') {
       nsfw = 'off'
     }
     
@@ -864,7 +864,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
             })
           } else {
             if(result.status === 404) {
-              console.log('404 – Subreddit wiki not found')
+              console.log('404 – Subreddit wiki not found')
             } else {
               console.error(`Something went wrong while fetching data from Reddit. ${result.status} – ${result.statusText}`)
               console.error(config.reddit_api_error_text)
@@ -922,7 +922,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
         })
       } else {
         if(result.status === 404) {
-          console.log('404 – Subreddit not found')
+          console.log('404 – Subreddit not found')
         } else {
           console.error(`Something went wrong while fetching data from Reddit. ${result.status} – ${result.statusText}`)
           console.error(config.reddit_api_error_text)
@@ -991,7 +991,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
       if(json) {
         console.log(`Got /r/${subreddit} key from redis.`);
         (async () => {
-          if(api_req) {
+          if(api_req) {
             return handleTedditApiSubreddit(json, req, res, 'redis', api_type, api_target, subreddit)
           } else {
             let processed_json = await processJsonSubreddit(json, 'redis', null, req.cookies)
@@ -1038,7 +1038,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
                 } else {
                   console.log(`Fetched the JSON from reddit.com/r/${subreddit}.`);
                   (async () => {
-                    if(api_req) {
+                    if(api_req) {
                       return handleTedditApiSubreddit(json, req, res, 'from_online', api_type, api_target, subreddit)
                     } else {
                       let processed_json = await processJsonSubreddit(json, 'from_online', null, req.cookies)
@@ -1063,7 +1063,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
             })
           } else {
             if(result.status === 404) {
-              console.log('404 – Subreddit not found')
+              console.log('404 – Subreddit not found')
             } else {
               console.error(`Something went wrong while fetching data from Reddit. ${result.status} – ${result.statusText}`)
               console.error(config.reddit_api_error_text)
@@ -1119,7 +1119,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
         (async () => {
           if(!more_comments_cursor) {
             let processed_json = await processJsonPost(json, false, req.cookies)
-            let finalized_json = await finalizeJsonPost(processed_json, id, post_url, null, viewing_comment)
+            let finalized_json = await finalizeJsonPost(processed_json, id, post_url, null, viewing_comment, req.cookies)
             return res.render('post', {
               post: finalized_json.post_data,
               comments: finalized_json.comments,
@@ -1215,7 +1215,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
             })
           } else {
             if(result.status === 404) {
-              console.log('404 – Post not found')
+              console.log('404 – Post not found')
             } else {
               console.error(`Something went wrong while fetching data from Reddit. ${result.status} – ${result.statusText}`)
               console.error(config.reddit_api_error_text)
@@ -1483,7 +1483,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
       if(json) {
         console.log(`Got /u/${user} custom_feed key from redis.`);
         (async () => {
-          if(api_req) {
+          if(api_req) {
             return handleTedditApiSubreddit(json, req, res, 'redis', api_type, api_target, subreddit)
           } else {
             let processed_json = await processJsonSubreddit(json, 'redis', null, req.cookies)
@@ -1529,7 +1529,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
                 } else {
                   console.log(`Fetched the JSON from reddit.com/r/${subreddit}.`);
                   (async () => {
-                    if(api_req) {
+                    if(api_req) {
                       return handleTedditApiSubreddit(json, req, res, 'from_online', api_type, api_target, subreddit)
                     } else {
                       let processed_json = await processJsonSubreddit(json, 'from_online', null, req.cookies)
@@ -1553,7 +1553,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
             })
           } else {
             if(result.status === 404) {
-              console.log('404 – Subreddit not found')
+              console.log('404 – Subreddit not found')
             } else {
               console.error(`Something went wrong while fetching data from Reddit. ${result.status} – ${result.statusText}`)
               console.error(config.reddit_api_error_text)
@@ -1581,6 +1581,7 @@ module.exports = (app, redis, fetch, RedditAPI) => {
     let nsfw_enabled = req.body.nsfw_enabled
     let highlight_controversial = req.body.highlight_controversial
     let post_media_max_height = req.body.post_media_max_height
+    let collapse_child_comments = req.body.collapse_child_comments
 
     res.cookie('theme', theme, { maxAge: 365 * 24 * 60 * 60 * 1000, httpOnly: true })
     
@@ -1604,7 +1605,13 @@ module.exports = (app, redis, fetch, RedditAPI) => {
 
     if(config.post_media_max_heights.hasOwnProperty(post_media_max_height) || !isNaN(post_media_max_height))
       res.cookie('post_media_max_height', post_media_max_height, { maxAge: 365 * 24 * 60 * 60 * 1000, httpOnly: true })
-
+    
+    if(collapse_child_comments === 'on')
+      collapse_child_comments = 'true'
+    else
+      collapse_child_comments = 'false'
+    res.cookie('collapse_child_comments', collapse_child_comments, { maxAge: 365 * 24 * 60 * 60 * 1000, httpOnly: true })
+    
     return res.redirect('/preferences')
   })
   
@@ -1708,3 +1715,4 @@ module.exports = (app, redis, fetch, RedditAPI) => {
     }
   })
 }
+
diff --git a/views/preferences.pug b/views/preferences.pug
index 5431d92..65f348c 100644
--- a/views/preferences.pug
+++ b/views/preferences.pug
@@ -65,6 +65,12 @@ html
                       max_heights_html += `<option value="${key}" ${(user_key == key ? "selected" : "")}>${key}</option>`
                   }
                 != max_heights_html
+          .setting
+            label(for="collapse_child_comments") Collapse child comments automatically: 
+              if(user_preferences.collapse_child_comments == 'true')
+                input(type="checkbox", name="collapse_child_comments", id="collapse_child_comments", checked="checked")
+              else
+                input(type="checkbox", name="collapse_child_comments", id="collapse_child_comments")
           legend Subscribed subreddits
           .setting
             details