diff --git a/src-tauri/src/demo/mod.rs b/src-tauri/src/demo/mod.rs
index 0fee8b3..55b8510 100644
--- a/src-tauri/src/demo/mod.rs
+++ b/src-tauri/src/demo/mod.rs
@@ -275,6 +275,7 @@ pub enum Filter {
     FreeText(String),
     Has(String),
     MapName(String),
+    Not(Box<Filter>),
     PlayerName(String),
     TagName(String),
 }
@@ -287,28 +288,28 @@ struct Filters {
     free_text: Vec<String>,
     has: Vec<String>,
     map_name: Vec<String>,
+    not: Vec<Filters>,
     player_name: Vec<String>,
     tag_name: Vec<String>,
 }
 
 impl Filters {
-    fn from_filter_list(filters: &[Filter]) -> Self {
-        let mut result = Self::default();
-
-        for filter in filters {
-            match filter {
-                Filter::DemoType(value) => result.demo_type.push(value.to_lowercase()),
-                Filter::Event(value) => result.event.push(value.to_lowercase()),
-                Filter::FileName(value) => result.file_name.push(value.to_lowercase()),
-                Filter::FreeText(value) => result.free_text.push(value.to_lowercase()),
-                Filter::Has(value) => result.has.push(value.to_lowercase()),
-                Filter::MapName(value) => result.map_name.push(value.to_lowercase()),
-                Filter::PlayerName(value) => result.player_name.push(value.to_lowercase()),
-                Filter::TagName(value) => result.tag_name.push(value.to_lowercase()),
+    fn add_filter(&mut self, filter: &Filter) {
+        match filter {
+            Filter::DemoType(value) => self.demo_type.push(value.to_lowercase()),
+            Filter::Event(value) => self.event.push(value.to_lowercase()),
+            Filter::FileName(value) => self.file_name.push(value.to_lowercase()),
+            Filter::FreeText(value) => self.free_text.push(value.to_lowercase()),
+            Filter::Has(value) => self.has.push(value.to_lowercase()),
+            Filter::MapName(value) => self.map_name.push(value.to_lowercase()),
+            Filter::Not(filter) => {
+                let mut excluded = Self::default();
+                excluded.add_filter(filter);
+                self.not.push(excluded);
             }
+            Filter::PlayerName(value) => self.player_name.push(value.to_lowercase()),
+            Filter::TagName(value) => self.tag_name.push(value.to_lowercase()),
         }
-
-        result
     }
 
     fn matches(&self, demo: &Demo) -> bool {
@@ -320,6 +321,7 @@ impl Filters {
             && self.matches_map(demo)
             && self.matches_client(demo)
             && self.matches_tag(demo)
+            && self.not.iter().all(|filter| !filter.matches(demo))
     }
 
     fn matches_type(&self, demo: &Demo) -> bool {
@@ -428,12 +430,24 @@ impl Filters {
     }
 }
 
+impl<'a> FromIterator<&'a Filter> for Filters {
+    fn from_iter<T: IntoIterator<Item = &'a Filter>>(filters: T) -> Self {
+        let mut result = Self::default();
+
+        for filter in filters {
+            result.add_filter(filter);
+        }
+
+        result
+    }
+}
+
 pub fn sort_demos(demos: &mut [Arc<Demo>], sort_key: SortKey, reverse: bool) {
     demos.sort_unstable_by(|d1, d2| compare_demos_by(sort_key, reverse, d1, d2));
 }
 
 pub fn filter_demos(demos: &[Arc<Demo>], filters: &[Filter]) -> Vec<Arc<Demo>> {
-    let filters = Filters::from_filter_list(filters);
+    let filters: Filters = filters.iter().collect();
 
     demos
         .iter()
diff --git a/src/demo.ts b/src/demo.ts
index 5046e21..5b9ce7f 100644
--- a/src/demo.ts
+++ b/src/demo.ts
@@ -270,5 +270,6 @@ export type DemoFilter =
   | { free_text: string }
   | { has: string }
   | { map_name: string }
+  | { not: DemoFilter }
   | { player_name: string }
   | { tag_name: string };
diff --git a/src/routes/demos/demoDir/KeyValueQueryLanguage.tsx b/src/routes/demos/demoDir/KeyValueQueryLanguage.tsx
index 1d68fd5..35348eb 100644
--- a/src/routes/demos/demoDir/KeyValueQueryLanguage.tsx
+++ b/src/routes/demos/demoDir/KeyValueQueryLanguage.tsx
@@ -61,11 +61,11 @@ export const keyValueQueryLanguage: QueryLanguage<Token, Parameters> = {
     return tokens;
   },
   parser: (token: string, { filterPatterns }): Token => {
-    const matches = /^([a-zA-Z0-9-_]+):(.*)$/.exec(token);
+    const matches = /^(!?[a-zA-Z0-9-_]+):(.*)$/.exec(token);
     if (matches !== null) {
       const [_, key, value] = matches;
 
-      if (Object.keys(filterPatterns).includes(key)) {
+      if (Object.keys(filterPatterns).includes(key.replace(/^!/, ""))) {
         return { type: "filter", value: { key, value } };
       } else {
         return { type: "invalid-filter", value: { key, value } };
diff --git a/src/routes/demos/demoDir/index.tsx b/src/routes/demos/demoDir/index.tsx
index f7033b4..f3af0f2 100644
--- a/src/routes/demos/demoDir/index.tsx
+++ b/src/routes/demos/demoDir/index.tsx
@@ -61,6 +61,14 @@ function tokenToDemoFilter(token: Token): DemoFilter | null {
         return null;
       }
 
+      if (token.value.key.startsWith("!")) {
+        const filter = tokenToDemoFilter({
+          ...token,
+          value: { ...token.value, key: token.value.key.slice(1) },
+        });
+        return filter === null ? null : { not: filter };
+      }
+
       switch (token.value.key as FilterPatternKey | string) {
         case "type":
           return { demo_type: replaceBackslashPlaceholder(token.value.value) };
diff --git a/src/routes/demos/demoDir/useAutocomplete.tsx b/src/routes/demos/demoDir/useAutocomplete.tsx
index bf3414e..fef9fe4 100644
--- a/src/routes/demos/demoDir/useAutocomplete.tsx
+++ b/src/routes/demos/demoDir/useAutocomplete.tsx
@@ -59,13 +59,14 @@ export const useAutocomplete = (
   useEffect(() => {
     if (currentTokenKeyValue === null) {
       const keys = Object.keys(filterPatterns)
+        .map((key) => (currentToken.startsWith("!") ? `!${key}` : key))
         .filter((key) => key.includes(currentToken))
         .map((key) => `${key}:`);
       setDropdownItems(keys);
     } else {
       const [currentTokenKey, currentTokenValue] = currentTokenKeyValue;
 
-      const values = filterPatterns[currentTokenKey];
+      const values = filterPatterns[currentTokenKey.replace(/^!/, "")];
 
       if (values !== undefined) {
         setDropdownItems(