diff --git a/src/Filtering/Filter.coffee b/src/Filtering/Filter.coffee
index 261c83539..46ec865c4 100644
--- a/src/Filtering/Filter.coffee
+++ b/src/Filtering/Filter.coffee
@@ -7,6 +7,9 @@ Filter =
     unless Conf['Filtered Backlinks']
       $.addClass doc, 'hide-backlinks'
 
+    nsfwBoards = 'aco,b,d,e,f,gif,h,hc,hm,hr,i,ic,pol,r,r9k,s,s4s,soc,t,trash,u,wg,y'
+    sfwBoards = '3,a,adv,an,asp,biz,c,cgl,ck,cm,co,diy,fa,fit,g,gd,his,int,jp,k,lgbt,lit,m,mlp,mu,n,news,o,out,p,po,qa,qst,sci,sp,tg,toy,trv,tv,v,vg,vp,vr,w,wsg,wsr,x'
+    
     for key of Config.filter
       @filters[key] = []
       for line in Conf[key].split '\n'
@@ -21,13 +24,14 @@ Filter =
         # Comma-separated list of the boards this filter applies to.
         # Defaults to global.
         boards = filter.match(/boards:([^;]+)/)?[1].toLowerCase() or 'global'
+        boards = boards.replace('nsfw', nsfwBoards).replace('sfw', sfwBoards)
         boards = if boards is 'global' then null else boards.split(',')
 
         # boards to exclude from an otherwise global rule
-        excludes = if boards is null
-          filter.match(/exclude:([^;]+)/)?[1].toLowerCase().split(',') or null
-        else
-          null
+        # due to the sfw and nsfw keywords, also works on all filters
+        # replaces 'nsfw' and 'sfw' for consistency
+        excludes = filter.match(/exclude:([^;]+)/)?[1].toLowerCase() or null
+        excludes = if excludes is null then null else excludes.replace('nsfw', nsfwBoards).replace('sfw', sfwBoards).split(',')
 
         if key in ['uniqueID', 'MD5']
           # MD5 filter will use strings instead of regular expressions.
diff --git a/src/General/Settings/Filter-guide.html b/src/General/Settings/Filter-guide.html
index 50ffaf0af..22cf5a5a9 100644
--- a/src/General/Settings/Filter-guide.html
+++ b/src/General/Settings/Filter-guide.html
@@ -7,11 +7,11 @@
 </p>
 <ul>You can use these settings with each regular expression, separate them with semicolons:
   <li>
-    Per boards, separate them with commas. It is global if not specified.<br>
-    For example: <code>boards:a,jp;</code>.
+    Per boards, separate them with commas. It is global if not specified. Use <code>sfw</code> and <code>nsfw</code> to reference all worksafe or not-worksafe boards.<br>
+    For example: <code>boards:a,jp;</code>.<br>
   </li>
   <li>
-    In case of a global rule, select boards to be excluded from the filter.<br>
+    In case of a global rule or one that uses <code>sfw</code>/<code>nsfw</code>, select boards to be excluded from the filter.<br>
     For example: <code>exclude:vg,v;</code>.
   </li>
   <li>