diff --git a/.github/workflows/typos.yml b/.github/workflows/typos.yml
new file mode 100644
index 000000000..c3bc84125
--- /dev/null
+++ b/.github/workflows/typos.yml
@@ -0,0 +1,17 @@
+# https://github.com/crate-ci/typos
+# Add exceptions to _typos.toml
+# install and run locally: cargo install typos-cli && typos
+
+name: Spell Check
+on: [pull_request]
+
+jobs:
+  run:
+    name: Spell Check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Actions Repository
+        uses: actions/checkout@v2
+
+      - name: Check spelling of entire workspace
+        uses: crate-ci/typos@master
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a69d65fbb..41a29c524 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -390,7 +390,7 @@ NOTE: [`epaint`](crates/epaint/CHANGELOG.md), [`eframe`](crates/eframe/CHANGELOG
 * `Fonts::layout_job`: New text layout engine allowing mixing fonts, colors and styles, with underlining and strikethrough.
 * Added `ui.add_enabled(bool, widget)` to easily add a possibly disabled widget.
 * Added `ui.add_enabled_ui(bool, |ui| …)` to create a possibly disabled UI section.
-* Added feature `"serialize"` separatedly from `"persistence"`.
+* Added feature `"serialize"` separately from `"persistence"`.
 * Added `egui::widgets::global_dark_light_mode_buttons` to easily add buttons for switching the egui theme.
 * `TextEdit` can now be used to show text which can be selected and copied, but not edited.
 * Added `Memory::caches` for caching things from one frame to the next.
@@ -405,7 +405,7 @@ NOTE: [`epaint`](crates/epaint/CHANGELOG.md), [`eframe`](crates/eframe/CHANGELOG
 * MSRV (Minimum Supported Rust Version) is now `1.54.0`.
 * By default, `DragValue`s no longer show a tooltip when hovered. Change with `Style::explanation_tooltips`.
 * Smaller and nicer color picker.
-* `ScrollArea` will auto-shrink to content size unless told otherwise using `ScollArea::auto_shrink`.
+* `ScrollArea` will auto-shrink to content size unless told otherwise using `ScrollArea::auto_shrink`.
 * By default, `Slider`'s `clamp_to_range` is set to true.
 * Renamed `TextEdit::enabled` to `TextEdit::interactive`.
 * `ui.label` (and friends) now take `impl ToString` as argument instead of `impl Into<Label>`.
@@ -597,8 +597,8 @@ NOTE: [`epaint`](crates/epaint/CHANGELOG.md), [`eframe`](crates/eframe/CHANGELOG
 * Fixed bug that would close a popup (e.g. the color picker) when clicking inside of it.
 
 ### Deprecated ☢️
-* Deprectated `combo_box_with_label` in favor of new `ComboBox`.
-* Deprectated type-specific constructors for `Slider` and `DragValue` (`Slider::f32`, `DragValue::usize` etc).
+* Deprecated `combo_box_with_label` in favor of new `ComboBox`.
+* Deprecated type-specific constructors for `Slider` and `DragValue` (`Slider::f32`, `DragValue::usize` etc).
 
 
 ## 0.10.0 - 2021-02-28 - Plot and polish
@@ -686,7 +686,7 @@ NOTE: [`epaint`](crates/epaint/CHANGELOG.md), [`eframe`](crates/eframe/CHANGELOG
 
 ### Changed 🔧
 * Renamed `Srgba` to `Color32`.
-* All color contructions now starts with `from_`, e.g. `Color32::from_rgb`.
+* All color constructors now starts with `from_`, e.g. `Color32::from_rgb`.
 * Renamed `FontFamily::VariableWidth` to `FontFamily::Proportional`.
 * Removed `pixels_per_point` from `FontDefinitions`.
 
diff --git a/Cargo.toml b/Cargo.toml
index 89bf485fa..30eac61c3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,7 +20,7 @@ members = [
 # opt-level = 's' # 10-20% smaller wasm compared to `opt-level = 3`
 # opt-level = 1 # very slow and big wasm. Don't do this.
 opt-level = 2 # fast and small wasm, basically same as `opt-level = 's'`
-# opt-level = 3 # unecessarily large wasm for no performance gain
+# opt-level = 3 # unnecessarily large wasm for no performance gain
 
 # debug = true # include debug symbols, useful when profiling wasm
 
diff --git a/README.md b/README.md
index 5bdf230e6..98e30b740 100644
--- a/README.md
+++ b/README.md
@@ -286,7 +286,7 @@ You can also call the layout code twice (once to get the size, once to do the in
 For "atomic" widgets (e.g. a button) `egui` knows the size before showing it, so centering buttons, labels etc is possible in `egui` without any special workarounds.
 
 #### CPU usage
-Since an immediate mode GUI does a full layout each frame, the layout code needs to be quick. If you have a very complex GUI this can tax the CPU. In particular, having a very large UI in a scroll area (with very long scrollback) can be slow, as the content needs to be layed out each frame.
+Since an immediate mode GUI does a full layout each frame, the layout code needs to be quick. If you have a very complex GUI this can tax the CPU. In particular, having a very large UI in a scroll area (with very long scrollback) can be slow, as the content needs to be laid out each frame.
 
 If you design the GUI with this in mind and refrain from huge scroll areas (or only lay out the part that is in view) then the performance hit is generally pretty small. For most cases you can expect `egui` to take up 1-2 ms per frame, but `egui` still has a lot of room for optimization (it's not something I've focused on yet). You can also set up `egui` to only repaint when there is interaction (e.g. mouse movement).
 
diff --git a/_typos.toml b/_typos.toml
new file mode 100644
index 000000000..2d9cf89c7
--- /dev/null
+++ b/_typos.toml
@@ -0,0 +1,10 @@
+# https://github.com/crate-ci/typos
+# install:  cargo install typos-cli
+# run:      typos
+
+[default.extend-words]
+nknown = "nknown"     # part of @55nknown username
+Prefence = "Prefence" # typo in glutin_winit API
+
+[files]
+extend-exclude = ["docs/egui_demo_app.js"] # auto-generated
diff --git a/crates/eframe/src/native/epi_integration.rs b/crates/eframe/src/native/epi_integration.rs
index 6ebffddf6..fb21e7031 100644
--- a/crates/eframe/src/native/epi_integration.rs
+++ b/crates/eframe/src/native/epi_integration.rs
@@ -522,7 +522,7 @@ impl EpiIntegration {
     }
 
     // ------------------------------------------------------------------------
-    // Persistance stuff:
+    // Persistence stuff:
 
     pub fn maybe_autosave(&mut self, app: &mut dyn epi::App, window: &winit::window::Window) {
         let now = std::time::Instant::now();
diff --git a/crates/eframe/src/web/backend.rs b/crates/eframe/src/web/backend.rs
index 032847235..3835dfb09 100644
--- a/crates/eframe/src/web/backend.rs
+++ b/crates/eframe/src/web/backend.rs
@@ -291,11 +291,11 @@ impl AppRunner {
     /// Get mutable access to the concrete [`App`] we enclose.
     ///
     /// This will panic if your app does not implement [`App::as_any_mut`].
-    pub fn app_mut<ConreteApp: 'static + App>(&mut self) -> &mut ConreteApp {
+    pub fn app_mut<ConcreteApp: 'static + App>(&mut self) -> &mut ConcreteApp {
         self.app
             .as_any_mut()
             .expect("Your app must implement `as_any_mut`, but it doesn't")
-            .downcast_mut::<ConreteApp>()
+            .downcast_mut::<ConcreteApp>()
             .unwrap()
     }
 
diff --git a/crates/egui/src/containers/combo_box.rs b/crates/egui/src/containers/combo_box.rs
index 1e0321cd3..7bc12c7de 100644
--- a/crates/egui/src/containers/combo_box.rs
+++ b/crates/egui/src/containers/combo_box.rs
@@ -2,7 +2,7 @@ use epaint::Shape;
 
 use crate::{style::WidgetVisuals, *};
 
-/// Indicate wether or not a popup will be shown above or below the box.
+/// Indicate whether or not a popup will be shown above or below the box.
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 pub enum AboveOrBelow {
     Above,
diff --git a/crates/egui/src/grid.rs b/crates/egui/src/grid.rs
index c3427a96e..314266a75 100644
--- a/crates/egui/src/grid.rs
+++ b/crates/egui/src/grid.rs
@@ -257,7 +257,7 @@ impl GridLayout {
 
 /// A simple grid layout.
 ///
-/// The cells are always layed out left to right, top-down.
+/// The cells are always laid out left to right, top-down.
 /// The contents of each cell will be aligned to the left and center.
 ///
 /// If you want to add multiple widgets to a cell you need to group them with
diff --git a/crates/egui/src/painter.rs b/crates/egui/src/painter.rs
index 304d4f96e..214bbe175 100644
--- a/crates/egui/src/painter.rs
+++ b/crates/egui/src/painter.rs
@@ -423,7 +423,7 @@ impl Painter {
         self.fonts(|f| f.layout(text, font_id, color, f32::INFINITY))
     }
 
-    /// Paint text that has already been layed out in a [`Galley`].
+    /// Paint text that has already been laid out in a [`Galley`].
     ///
     /// You can create the [`Galley`] with [`Self::layout`].
     ///
@@ -435,7 +435,7 @@ impl Painter {
         }
     }
 
-    /// Paint text that has already been layed out in a [`Galley`].
+    /// Paint text that has already been laid out in a [`Galley`].
     ///
     /// You can create the [`Galley`] with [`Self::layout`].
     ///
diff --git a/crates/egui/src/style.rs b/crates/egui/src/style.rs
index eed834985..eb3b6036b 100644
--- a/crates/egui/src/style.rs
+++ b/crates/egui/src/style.rs
@@ -508,7 +508,7 @@ pub struct Visuals {
     /// Draw a vertical lien left of indented region, in e.g. [`crate::CollapsingHeader`].
     pub indent_has_left_vline: bool,
 
-    /// Wether or not Grids and Tables should be striped by default
+    /// Whether or not Grids and Tables should be striped by default
     /// (have alternating rows differently colored).
     pub striped: bool,
 
diff --git a/crates/egui/src/ui.rs b/crates/egui/src/ui.rs
index 5990fb7e8..13b3e81f1 100644
--- a/crates/egui/src/ui.rs
+++ b/crates/egui/src/ui.rs
@@ -424,7 +424,7 @@ impl Ui {
 /// # Sizes etc
 impl Ui {
     /// Where and how large the [`Ui`] is already.
-    /// All widgets that have been added ot this [`Ui`] fits within this rectangle.
+    /// All widgets that have been added to this [`Ui`] fits within this rectangle.
     ///
     /// No matter what, the final Ui will be at least this large.
     ///
diff --git a/crates/egui/src/widget_text.rs b/crates/egui/src/widget_text.rs
index 9babef5cf..bc71c2b6b 100644
--- a/crates/egui/src/widget_text.rs
+++ b/crates/egui/src/widget_text.rs
@@ -344,7 +344,7 @@ impl RichText {
 /// Often a [`WidgetText`] is just a simple [`String`],
 /// but it can be a [`RichText`] (text with color, style, etc),
 /// a [`LayoutJob`] (for when you want full control of how the text looks)
-/// or text that has already been layed out in a [`Galley`].
+/// or text that has already been laid out in a [`Galley`].
 #[derive(Clone)]
 pub enum WidgetText {
     RichText(RichText),
@@ -662,7 +662,7 @@ impl WidgetTextJob {
 
 // ----------------------------------------------------------------------------
 
-/// Text that has been layed out and ready to be painted.
+/// Text that has been laid out and ready to be painted.
 #[derive(Clone, PartialEq)]
 pub struct WidgetTextGalley {
     pub galley: Arc<Galley>,
@@ -670,13 +670,13 @@ pub struct WidgetTextGalley {
 }
 
 impl WidgetTextGalley {
-    /// Size of the layed out text.
+    /// Size of the laid out text.
     #[inline]
     pub fn size(&self) -> crate::Vec2 {
         self.galley.size()
     }
 
-    /// Size of the layed out text.
+    /// Size of the laid out text.
     #[inline]
     pub fn text(&self) -> &str {
         self.galley.text()
diff --git a/crates/egui_demo_lib/src/demo/about.rs b/crates/egui_demo_lib/src/demo/about.rs
index 7c975e9ee..0fbb97642 100644
--- a/crates/egui_demo_lib/src/demo/about.rs
+++ b/crates/egui_demo_lib/src/demo/about.rs
@@ -69,7 +69,7 @@ fn about_immediate_mode(ui: &mut egui::Ui) {
     ui.label("Note how there are no callbacks or messages, and no button state to store.");
 
     ui.label("Immediate mode has its roots in gaming, where everything on the screen is painted at the display refresh rate, i.e. at 60+ frames per second. \
-        In immediate mode GUIs, the entire interface is layed out and painted at the same high rate. \
+        In immediate mode GUIs, the entire interface is laid out and painted at the same high rate. \
         This makes immediate mode GUIs especially well suited for highly interactive applications.");
 
     ui.horizontal_wrapped(|ui| {
diff --git a/crates/egui_demo_lib/src/demo/scrolling.rs b/crates/egui_demo_lib/src/demo/scrolling.rs
index 600acc8e2..b970b3264 100644
--- a/crates/egui_demo_lib/src/demo/scrolling.rs
+++ b/crates/egui_demo_lib/src/demo/scrolling.rs
@@ -86,7 +86,7 @@ impl super::View for Scrolling {
 
 fn huge_content_lines(ui: &mut egui::Ui) {
     ui.label(
-        "A lot of rows, but only the visible ones are layed out, so performance is still good:",
+        "A lot of rows, but only the visible ones are laid out, so performance is still good:",
     );
     ui.add_space(4.0);
 
diff --git a/crates/egui_demo_lib/src/demo/table_demo.rs b/crates/egui_demo_lib/src/demo/table_demo.rs
index 00f47dc62..73541831e 100644
--- a/crates/egui_demo_lib/src/demo/table_demo.rs
+++ b/crates/egui_demo_lib/src/demo/table_demo.rs
@@ -2,7 +2,7 @@
 #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
 enum DemoType {
     Manual,
-    ManyHomogenous,
+    ManyHomogeneous,
     ManyHeterogenous,
 }
 
@@ -61,7 +61,7 @@ impl super::View for TableDemo {
             ui.radio_value(&mut self.demo, DemoType::Manual, "Few, manual rows");
             ui.radio_value(
                 &mut self.demo,
-                DemoType::ManyHomogenous,
+                DemoType::ManyHomogeneous,
                 "Thousands of rows of same height",
             );
             ui.radio_value(
@@ -179,7 +179,7 @@ impl TableDemo {
                         });
                     }
                 }
-                DemoType::ManyHomogenous => {
+                DemoType::ManyHomogeneous => {
                     body.rows(text_height, self.num_rows, |row_index, mut row| {
                         row.col(|ui| {
                             ui.label(row_index.to_string());
diff --git a/crates/egui_demo_lib/src/demo/tests.rs b/crates/egui_demo_lib/src/demo/tests.rs
index f3a5fdad7..2204548e3 100644
--- a/crates/egui_demo_lib/src/demo/tests.rs
+++ b/crates/egui_demo_lib/src/demo/tests.rs
@@ -52,7 +52,7 @@ impl super::View for IdTest {
 
         ui.label("\
             Widgets that store state require unique and persisting identifiers so we can track their state between frames.\n\
-            For instance, collapsable headers needs to store whether or not they are open. \
+            For instance, collapsible headers needs to store whether or not they are open. \
             Their Id:s are derived from their names. \
             If you fail to give them unique names then clicking one will open both. \
             To help you debug this, an error message is printed on screen:");
diff --git a/crates/egui_demo_lib/src/lib.rs b/crates/egui_demo_lib/src/lib.rs
index 188d5acc0..43db89f2d 100644
--- a/crates/egui_demo_lib/src/lib.rs
+++ b/crates/egui_demo_lib/src/lib.rs
@@ -56,7 +56,7 @@ pub const LOREM_IPSUM: &str = "Lorem ipsum dolor sit amet, consectetur adipiscin
 
 pub const LOREM_IPSUM_LONG: &str = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
 
-Curabitur pretium tincidunt lacus. Nulla gravida orci a odio. Nullam varius, turpis et commodo pharetra, est eros bibendum elit, nec luctus magna felis sollicitudin mauris. Integer in mauris eu nibh euismod gravida. Duis ac tellus et risus vulputate vehicula. Donec lobortis risus a elit. Etiam tempor. Ut ullamcorper, ligula eu tempor congue, eros est euismod turpis, id tincidunt sapien risus a quam. Maecenas fermentum consequat mi. Donec fermentum. Pellentesque malesuada nulla a mi. Duis sapien sem, aliquet nec, commodo eget, consequat quis, neque. Aliquam faucibus, elit ut dictum aliquet, felis nisl adipiscing sapien, sed malesuada diam lacus eget erat. Cras mollis scelerisque nunc. Nullam arcu. Aliquam consequat. Curabitur augue lorem, dapibus quis, laoreet et, pretium ac, nisi. Aenean magna nisl, mollis quis, molestie eu, feugiat in, orci. In hac habitasse platea dictumst.";
+Curabitur pretium tincidunt lacus. Nulla gravida orci a odio. Nullam various, turpis et commodo pharetra, est eros bibendum elit, nec luctus magna felis sollicitudin mauris. Integer in mauris eu nibh euismod gravida. Duis ac tellus et risus vulputate vehicula. Donec lobortis risus a elit. Etiam tempor. Ut ullamcorper, ligula eu tempor congue, eros est euismod turpis, id tincidunt sapien risus a quam. Maecenas fermentum consequat mi. Donec fermentum. Pellentesque malesuada nulla a mi. Duis sapien sem, aliquet nec, commodo eget, consequat quis, neque. Aliquam faucibus, elit ut dictum aliquet, felis nisl adipiscing sapien, sed malesuada diam lacus eget erat. Cras mollis scelerisque nunc. Nullam arcu. Aliquam consequat. Curabitur augue lorem, dapibus quis, laoreet et, pretium ac, nisi. Aenean magna nisl, mollis quis, molestie eu, feugiat in, orci. In hac habitasse platea dictumst.";
 
 // ----------------------------------------------------------------------------
 
diff --git a/crates/epaint/src/shape.rs b/crates/epaint/src/shape.rs
index d9eb0d21a..046215661 100644
--- a/crates/epaint/src/shape.rs
+++ b/crates/epaint/src/shape.rs
@@ -625,7 +625,7 @@ pub struct TextShape {
     /// Top left corner of the first character.
     pub pos: Pos2,
 
-    /// The layed out text, from [`Fonts::layout_job`].
+    /// The laid out text, from [`Fonts::layout_job`].
     pub galley: Arc<Galley>,
 
     /// Add this underline to the whole text.
diff --git a/crates/epaint/src/text/text_layout.rs b/crates/epaint/src/text/text_layout.rs
index 8b57b2b06..c493f8f94 100644
--- a/crates/epaint/src/text/text_layout.rs
+++ b/crates/epaint/src/text/text_layout.rs
@@ -70,7 +70,7 @@ pub fn layout(fonts: &mut FontsImpl, job: Arc<LayoutJob>) -> Galley {
         for (i, row) in rows.iter_mut().enumerate() {
             let is_last_row = i + 1 == num_rows;
             let justify_row = justify && !row.ends_with_newline && !is_last_row;
-            halign_and_jusitfy_row(
+            halign_and_justify_row(
                 point_scale,
                 row,
                 job.halign,
@@ -337,7 +337,7 @@ fn replace_last_glyph_with_overflow_character(
     }
 }
 
-fn halign_and_jusitfy_row(
+fn halign_and_justify_row(
     point_scale: PointScale,
     row: &mut Row,
     halign: Align,
diff --git a/crates/epaint/src/text/text_layout_types.rs b/crates/epaint/src/text/text_layout_types.rs
index bc317e311..d6d81d88b 100644
--- a/crates/epaint/src/text/text_layout_types.rs
+++ b/crates/epaint/src/text/text_layout_types.rs
@@ -850,7 +850,7 @@ impl Galley {
                 // keep same X coord
                 let x = self.pos_from_cursor(cursor).center().x;
                 let column = if x > self.rows[new_row].rect.right() {
-                    // beyond the end of this row - keep same colum
+                    // beyond the end of this row - keep same column
                     cursor.rcursor.column
                 } else {
                     self.rows[new_row].char_at(x)
diff --git a/docs/egui_demo_app.js b/docs/egui_demo_app.js
index c57636c37..983239e09 100644
--- a/docs/egui_demo_app.js
+++ b/docs/egui_demo_app.js
@@ -351,10 +351,10 @@ class WebHandle {
     /**
     * @param {string} _some_data
     */
-    set_some_content_from_javasript(_some_data) {
+    set_some_content_from_javascript(_some_data) {
         const ptr0 = passStringToWasm0(_some_data, wasm.__wbindgen_malloc, wasm.__wbindgen_realloc);
         const len0 = WASM_VECTOR_LEN;
-        wasm.webhandle_set_some_content_from_javasript(this.ptr, ptr0, len0);
+        wasm.webhandle_set_some_content_from_javascript(this.ptr, ptr0, len0);
     }
 }
 __exports.WebHandle = WebHandle;