diff --git a/schemas/visual-config.schema.json b/schemas/visual-config.schema.json
index dfd3aab51..1fd98b5ee 100644
--- a/schemas/visual-config.schema.json
+++ b/schemas/visual-config.schema.json
@@ -226,6 +226,9 @@
         "KEYLOG_GLOW_BLUR": {
             "type": "number"
         },
+        "KEYLOG_INTERVAL_LENGTH": {
+            "type": "number"
+        },
         "KEYLOG_MAXIMUM_FOR_NORMALIZATION": {
             "type": "number"
         },
diff --git a/src/frontend/overlay/src/components/molecules/Clock.tsx b/src/frontend/overlay/src/components/molecules/Clock.tsx
index 2a4d8decb..2ce7d0328 100644
--- a/src/frontend/overlay/src/components/molecules/Clock.tsx
+++ b/src/frontend/overlay/src/components/molecules/Clock.tsx
@@ -21,6 +21,23 @@ const formatLongTime = (ms: number, showSeconds: boolean): string => {
     }
 };
 
+export const getStartTime = (contestInfo: ContestInfo): number | undefined => {
+    const contestType = contestInfo?.status?.type;
+    if (contestType === undefined) {
+        return undefined;
+    }
+    switch (contestType) {
+        case ContestStatus.Type.before:
+            return contestInfo.status.scheduledStartAtUnixMs;
+        case ContestStatus.Type.running:
+            return contestInfo.status.startedAtUnixMs;
+        case ContestStatus.Type.finalized:
+        case ContestStatus.Type.over:
+            return contestInfo.status.startedAtUnixMs;
+    }
+    return undefined;
+};
+
 export const calculateContestTime = (contestInfo: ContestInfo): number => {
     if (contestInfo === undefined) {
         return undefined;
diff --git a/src/frontend/overlay/src/components/organisms/holder/TimeLine.tsx b/src/frontend/overlay/src/components/organisms/holder/TimeLine.tsx
index f0fa34ca4..519a005e2 100644
--- a/src/frontend/overlay/src/components/organisms/holder/TimeLine.tsx
+++ b/src/frontend/overlay/src/components/organisms/holder/TimeLine.tsx
@@ -3,8 +3,17 @@ import styled from "styled-components";
 import { useAppSelector } from "@/redux/hooks";
 import c from "@/config";
 import { getIOIColor } from "@/utils/statusInfo";
-import { ContestInfo, TeamId, TeamInfo, TimeLineRunInfo } from "@shared/api";
-import { calculateContestTime } from "@/components/molecules/Clock";
+import {
+    ContestInfo,
+    ContestStatus,
+    TeamId,
+    TeamInfo,
+    TimeLineRunInfo,
+} from "@shared/api";
+import {
+    calculateContestTime,
+    getStartTime,
+} from "@/components/molecules/Clock";
 import { isShouldUseDarkColor } from "@/utils/colors";
 import { KeylogGraph } from "./KeylogGraph";
 
@@ -425,6 +434,34 @@ export function TimeLineBackground({
     );
 }
 
+interface KeyboardEvent {
+    timestamp: string; // ISO8601
+    keys: Record<string, KeyStats>;
+}
+
+interface KeyStats {
+    raw?: number;
+    bare?: number;
+    shift?: number;
+    ctrl?: number;
+    alt?: number;
+    meta?: number;
+
+    "ctrl+shift"?: number;
+    "ctrl+alt"?: number;
+    "shift+alt"?: number;
+    "ctrl+meta"?: number;
+    "shift+meta"?: number;
+    "alt+meta"?: number;
+
+    "ctrl+shift+alt"?: number;
+    "ctrl+shift+meta"?: number;
+    "ctrl+alt+meta"?: number;
+    "shift+alt+meta"?: number;
+
+    "ctrl+shift+alt+meta"?: number;
+}
+
 export function TimeLine({
     teamId,
     className = null,
@@ -509,20 +546,60 @@ export function TimeLine({
     }, [contestInfo, isPvp]);
 
     useEffect(() => {
-        if (!keylogUrl) return;
+        const startTime = getStartTime(contestInfo);
+        if (!keylogUrl || !startTime) return;
 
-        async function fetchKeylogData() {
+        // TODO: Move all this code to KeylogGraph
+        async function fetchNDJSON(): Promise<KeyboardEvent[]> {
             try {
                 const response = await fetch(keylogUrl);
-                const data: number[] = await response.json();
-                setKeylog(data);
-            } catch (error) {
-                console.error("Error fetching keylog data:", error);
+                if (!response.ok) throw new Error("Failed to fetch keylog");
+
+                const text = await response.text();
+                return text
+                    .trim()
+                    .split("\n")
+                    .filter((line) => line.trim())
+                    .map((line) => JSON.parse(line) as KeyboardEvent);
+            } catch (e) {
+                console.error(e);
+                return [];
             }
         }
 
+        async function fetchKeylogData() {
+            const events = await fetchNDJSON();
+            if (events.length === 0) return;
+
+            const contestStart = new Date(startTime!).getTime();
+            const AGGREGATION_MS = c.KEYLOG_INTERVAL_LENGTH;
+
+            const totalIntervals = Math.ceil(
+                contestInfo!.contestLengthMs / c.KEYLOG_INTERVAL_LENGTH,
+            );
+            const interval_minutes = c.KEYLOG_INTERVAL_LENGTH / 60000;
+            const pressesPerMinuteFactor = 1 / interval_minutes;
+            const newKeylog = new Array(totalIntervals).fill(0);
+
+            events.forEach((event) => {
+                const eventTime = new Date(event.timestamp).getTime();
+
+                if (eventTime < contestStart) return;
+
+                const timeDiff = eventTime - contestStart;
+                const index = Math.floor(timeDiff / AGGREGATION_MS);
+
+                if (index >= 0 && index < totalIntervals) {
+                    const pressesCount = Object.values(event.keys).reduce((sum, k) => sum + (k.bare ?? 0) + (k.shift ?? 0), 0);
+                    newKeylog[index] += pressesCount;
+                }
+            });
+
+            setKeylog(newKeylog.map(v => v * pressesPerMinuteFactor));
+        }
+
         fetchKeylogData();
-    }, [keylogUrl]);
+    }, [keylogUrl, contestInfo]);
 
     if (!contestInfo) return null;
 
diff --git a/src/frontend/overlay/src/config.interface.ts b/src/frontend/overlay/src/config.interface.ts
index 40aadf0d5..78d74a4d9 100644
--- a/src/frontend/overlay/src/config.interface.ts
+++ b/src/frontend/overlay/src/config.interface.ts
@@ -289,6 +289,7 @@ export interface OverlayConfig {
 
     // Keylog
     KEYLOG_MAXIMUM_FOR_NORMALIZATION: number; // max value for normalization
+    KEYLOG_INTERVAL_LENGTH: number; // ms
     KEYLOG_TOP_PADDING: number; // px
     KEYLOG_BOTTOM_PADDING: number; // px
     KEYLOG_Z_INDEX: number;
diff --git a/src/frontend/overlay/src/config.ts b/src/frontend/overlay/src/config.ts
index 0487b72c9..3da56ace4 100644
--- a/src/frontend/overlay/src/config.ts
+++ b/src/frontend/overlay/src/config.ts
@@ -355,6 +355,7 @@ function getDefaultConfig(): EvaluatableTo<OverlayConfig> {
         TIMELINE_TIME_BORDER_WIDTH: 2,
 
         KEYLOG_MAXIMUM_FOR_NORMALIZATION: 500, // max value for normalization
+        KEYLOG_INTERVAL_LENGTH: 1000 * 60, // ms
         KEYLOG_TOP_PADDING: 6, // px
         KEYLOG_BOTTOM_PADDING: 2, // px
         KEYLOG_Z_INDEX: 0,