diff --git a/README.md b/README.md
index e1ede93..a33a98f 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,13 @@ requires python 3 on linux, OSX, or Windows
     cd reddit-html-archiver
     chmod u+x *.py
 
+Windows users may need to run
+
+    chcp 65001
+    set PYTHONIOENCODING=utf-8
+
+before running `fetch_links.py` or `write_html.py` to resolve encoding errors such as 'codec can't encode character'.
+
 ### fetch reddit data
 
 data is fetched by subreddit and date range and is stored as csv files in `data`.
@@ -44,15 +51,6 @@ to update an html archive, delete everything in `r` aside from `r/static` and re
 
 copy the contents of the `r` directory to a web root or appropriately served git repo.
 
-### Windows users
-
-Windows users may need to run the following before running `fetch_links.py` or `write_html.py`:
-
-    chcp 65001
-    set PYTHONIOENCODING=utf-8
-
-This will resolve errors encoding errors such as 'codec can't encode character'.
-
 ### potential improvements
 
 * fetch_links
@@ -62,15 +60,16 @@ This will resolve errors encoding errors such as 'codec can't encode character'.
   * score update
   * scores from reddit with [praw](https://github.com/praw-dev/praw)
 * real templating
-* filter output per sub, individual min score and comments filters
-* js markdown url previews
-* js powered search page, show no links by default
-* link and comments pages
-  * view on reddit.com
-  * show link domains
+* choose [Bootswatch](https://bootswatch.com/) theme
+* specify subreddits to output
+* show link domain/post type
 * user pages
   * add pagination, posts sorted by score, comments, date, sub
   * too many files in one directory
+* view on reddit.com
+* js powered search page, show no links by default
+* js inline media embeds/expandos
+* archive.org links
 
 ### see also
 
diff --git a/fetch_links.py b/fetch_links.py
index e7bdc8c..ec77bcc 100755
--- a/fetch_links.py
+++ b/fetch_links.py
@@ -214,4 +214,6 @@ if __name__ == '__main__':
     if args.self_only:
         self_only = True
 
+    args.subreddit = args.subreddit.lower()
+
     fetch_links(args.subreddit, args.date_start, args.date_stop, args.limit, args.score, self_only)
diff --git a/write_html.py b/write_html.py
index fa47ca8..fdfbbb2 100755
--- a/write_html.py
+++ b/write_html.py
@@ -163,7 +163,7 @@ def write_subreddit_pages(subreddit, subs, link_index, stat_sub_filtered_links,
                 author_link_html = author_link_html.replace('###URL_AUTHOR###', author_url).replace('###AUTHOR###', l['author'])
 
                 link_url = l['url']
-                link_comments_url = sort_based_prefix + l['permalink'].strip('/')
+                link_comments_url = sort_based_prefix + l['permalink'].lower().strip('/')
                 link_comments_url = link_comments_url.replace('r/' + subreddit + '/', '')
                 idpath = '/'.join(list(l['id']))
                 link_comments_url = link_comments_url.replace(l['id'], idpath)
@@ -232,7 +232,7 @@ def write_link_page(subreddits, link, subreddit='', hide_deleted_comments=False)
     # reddit:  https://www.reddit.com/r/conspiracy/comments/8742iv/happening_now_classmate_former_friend_of/
     # archive: r/conspiracy/comments/8/7/4/2/i/v/happening_now_classmate_former_friend_of.html
     idpath = '/'.join(list(link['id']))
-    filepath = link['permalink'].strip('/') + '.html'
+    filepath = link['permalink'].lower().strip('/') + '.html'
     filepath = filepath.replace(link['id'], idpath)
     if os.path.isfile(filepath):
         return True
@@ -325,7 +325,7 @@ def write_link_page(subreddits, link, subreddit='', hide_deleted_comments=False)
     # reddit:  https://www.reddit.com/r/conspiracy/comments/8742iv/happening_now_classmate_former_friend_of/
     # archive: r/conspiracy/comments/8/7/4/2/i/v/happening_now_classmate_former_friend_of.html
     idpath = '/'.join(list(link['id']))
-    filepath = link['permalink'].strip('/') + '.html'
+    filepath = link['permalink'].lower().strip('/') + '.html'
     filepath = filepath.replace(link['id'], idpath)
     if not os.path.isfile(filepath):
         os.makedirs(os.path.dirname(filepath), exist_ok=True)
@@ -350,7 +350,7 @@ def write_subreddit_search_page(subreddit, subs, link_index, stat_sub_filtered_l
 
     links_html = ''
     for l in links:
-        link_comments_url = l['permalink'].strip('/').replace('r/' + subreddit + '/', '')
+        link_comments_url = l['permalink'].lower().strip('/').replace('r/' + subreddit + '/', '')
         idpath = '/'.join(list(l['id']))
         link_comments_url = link_comments_url.replace(l['id'], idpath)
         link_comments_url += '.html'
@@ -417,7 +417,7 @@ def write_user_page(subs, user_index):
             author_url = l['author'] + '.html'
             author_link_html = author_link_html.replace('###URL_AUTHOR###', author_url).replace('###AUTHOR###', l['author'])
 
-            link_comments_url = '../' + l['permalink'].strip('/').strip('r/')
+            link_comments_url = '../' + l['permalink'].lower().strip('/').strip('r/')
             idpath = '/'.join(list(l['id']))
             link_comments_url = link_comments_url.replace(l['id'], idpath)
             link_comments_url += '.html'
@@ -618,7 +618,7 @@ def get_subs():
         return subs
     for d in os.listdir('data'):
         if os.path.isdir('data' + '/' + d):
-            subs.append(d)
+            subs.append(d.lower())
     return subs
 
 def get_pager_html(page_num=1, pages=1):