diff --git a/web/src/lib/utils/editor.spec.ts b/web/src/lib/utils/editor.spec.ts
new file mode 100644
index 0000000000..fcaddad350
--- /dev/null
+++ b/web/src/lib/utils/editor.spec.ts
@@ -0,0 +1,326 @@
+import type { EditActions } from '$lib/managers/edit/edit-manager.svelte';
+import { buildAffineFromEdits, normalizeTransformEdits } from '$lib/utils/editor';
+import { AssetEditAction, MirrorAxis } from '@immich/sdk';
+
+type NormalizedParameters = {
+  rotation: number;
+  mirrorHorizontal: boolean;
+  mirrorVertical: boolean;
+};
+
+function normalizedToEdits(params: NormalizedParameters): EditActions {
+  const edits: EditActions = [];
+
+  if (params.mirrorHorizontal) {
+    edits.push({
+      action: AssetEditAction.Mirror,
+      parameters: { axis: MirrorAxis.Horizontal },
+    });
+  }
+
+  if (params.mirrorVertical) {
+    edits.push({
+      action: AssetEditAction.Mirror,
+      parameters: { axis: MirrorAxis.Vertical },
+    });
+  }
+
+  if (params.rotation !== 0) {
+    edits.push({
+      action: AssetEditAction.Rotate,
+      parameters: { angle: params.rotation },
+    });
+  }
+
+  return edits;
+}
+
+function compareEditAffines(editsA: EditActions, editsB: EditActions): boolean {
+  const normA = buildAffineFromEdits(editsA);
+  const normB = buildAffineFromEdits(editsB);
+
+  return (
+    Math.abs(normA.a - normB.a) < 0.0001 &&
+    Math.abs(normA.b - normB.b) < 0.0001 &&
+    Math.abs(normA.c - normB.c) < 0.0001 &&
+    Math.abs(normA.d - normB.d) < 0.0001
+  );
+}
+
+describe('edit normalization', () => {
+  it('should handle no edits', () => {
+    const edits: EditActions = [];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle a single 90° rotation', () => {
+    const edits: EditActions = [{ action: AssetEditAction.Rotate, parameters: { angle: 90 } }];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle a single 180° rotation', () => {
+    const edits: EditActions = [{ action: AssetEditAction.Rotate, parameters: { angle: 180 } }];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle a single 270° rotation', () => {
+    const edits: EditActions = [{ action: AssetEditAction.Rotate, parameters: { angle: 270 } }];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle a single horizontal mirror', () => {
+    const edits: EditActions = [{ action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Horizontal } }];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle a single vertical mirror', () => {
+    const edits: EditActions = [{ action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Vertical } }];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle 90° rotation + horizontal mirror', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Rotate, parameters: { angle: 90 } },
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Horizontal } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle 90° rotation + vertical mirror', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Rotate, parameters: { angle: 90 } },
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Vertical } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle 90° rotation + both mirrors', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Rotate, parameters: { angle: 90 } },
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Horizontal } },
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Vertical } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle 180° rotation + horizontal mirror', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Rotate, parameters: { angle: 180 } },
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Horizontal } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle 180° rotation + vertical mirror', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Rotate, parameters: { angle: 180 } },
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Vertical } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle 180° rotation + both mirrors', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Rotate, parameters: { angle: 180 } },
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Horizontal } },
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Vertical } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle 270° rotation + horizontal mirror', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Rotate, parameters: { angle: 270 } },
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Horizontal } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle 270° rotation + vertical mirror', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Rotate, parameters: { angle: 270 } },
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Vertical } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle 270° rotation + both mirrors', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Rotate, parameters: { angle: 270 } },
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Horizontal } },
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Vertical } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle horizontal mirror + 90° rotation', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Horizontal } },
+      { action: AssetEditAction.Rotate, parameters: { angle: 90 } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle horizontal mirror + 180° rotation', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Horizontal } },
+      { action: AssetEditAction.Rotate, parameters: { angle: 180 } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle horizontal mirror + 270° rotation', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Horizontal } },
+      { action: AssetEditAction.Rotate, parameters: { angle: 270 } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle vertical mirror + 90° rotation', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Vertical } },
+      { action: AssetEditAction.Rotate, parameters: { angle: 90 } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle vertical mirror + 180° rotation', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Vertical } },
+      { action: AssetEditAction.Rotate, parameters: { angle: 180 } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle vertical mirror + 270° rotation', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Vertical } },
+      { action: AssetEditAction.Rotate, parameters: { angle: 270 } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle both mirrors + 90° rotation', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Horizontal } },
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Vertical } },
+      { action: AssetEditAction.Rotate, parameters: { angle: 90 } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle both mirrors + 180° rotation', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Horizontal } },
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Vertical } },
+      { action: AssetEditAction.Rotate, parameters: { angle: 180 } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+
+  it('should handle both mirrors + 270° rotation', () => {
+    const edits: EditActions = [
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Horizontal } },
+      { action: AssetEditAction.Mirror, parameters: { axis: MirrorAxis.Vertical } },
+      { action: AssetEditAction.Rotate, parameters: { angle: 270 } },
+    ];
+
+    const result = normalizeTransformEdits(edits);
+    const normalizedEdits = normalizedToEdits(result);
+
+    expect(compareEditAffines(normalizedEdits, edits)).toBe(true);
+  });
+});
diff --git a/web/src/lib/utils/editor.ts b/web/src/lib/utils/editor.ts
index dc14e7a6e5..04c4bae32a 100644
--- a/web/src/lib/utils/editor.ts
+++ b/web/src/lib/utils/editor.ts
@@ -9,24 +9,7 @@ export function normalizeTransformEdits(edits: EditActions): {
 } {
   // construct an affine matrix from the edits
   // this is the same approach used in the backend to combine multiple transforms
-  const matrix = compose(
-    ...edits.map((edit) => {
-      switch (edit.action) {
-        case 'rotate': {
-          const parameters = edit.parameters as RotateParameters;
-          const angleInRadians = (-parameters.angle * Math.PI) / 180;
-          return rotate(angleInRadians);
-        }
-        case 'mirror': {
-          const parameters = edit.parameters as MirrorParameters;
-          return parameters.axis === 'horizontal' ? flipY() : flipX();
-        }
-        default: {
-          return identity();
-        }
-      }
-    }),
-  );
+  const matrix = buildAffineFromEdits(edits);
 
   let rotation = 0;
   let mirrorH = false;
@@ -57,3 +40,25 @@ export function normalizeTransformEdits(edits: EditActions): {
     mirrorVertical: mirrorV,
   };
 }
+
+export function buildAffineFromEdits(edits: EditActions) {
+  return compose(
+    identity(),
+    ...edits.map((edit) => {
+      switch (edit.action) {
+        case 'rotate': {
+          const parameters = edit.parameters as RotateParameters;
+          const angleInRadians = (-parameters.angle * Math.PI) / 180;
+          return rotate(angleInRadians);
+        }
+        case 'mirror': {
+          const parameters = edit.parameters as MirrorParameters;
+          return parameters.axis === 'horizontal' ? flipY() : flipX();
+        }
+        default: {
+          return identity();
+        }
+      }
+    }),
+  );
+}