diff --git a/packages/replay/src/eventBuffer.ts b/packages/replay/src/eventBuffer.ts
index 94aa0870bf73..6444c2cdf72f 100644
--- a/packages/replay/src/eventBuffer.ts
+++ b/packages/replay/src/eventBuffer.ts
@@ -77,6 +77,11 @@ export class EventBufferProxy implements EventBuffer {
     return this._used.finish();
   }
 
+  /** @inheritDoc */
+  public finishImmediate(): ReplayRecordingData {
+    return this._used.finishImmediate();
+  }
+
   /** Ensure the worker has loaded. */
   private async _ensureWorkerIsLoaded(): Promise<void> {
     try {
@@ -139,14 +144,18 @@ class EventBufferArray implements EventBuffer {
 
   public finish(): Promise<string> {
     return new Promise<string>(resolve => {
-      // Make a copy of the events array reference and immediately clear the
-      // events member so that we do not lose new events while uploading
-      // attachment.
-      const eventsRet = this._events;
-      this._events = [];
-      resolve(JSON.stringify(eventsRet));
+      resolve(this.finishImmediate());
     });
   }
+
+  public finishImmediate(): string {
+    // Make a copy of the events array reference and immediately clear the
+    // events member so that we do not lose new events while uploading
+    // attachment.
+    const eventsRet = this._events;
+    this._events = [];
+    return JSON.stringify(eventsRet);
+  }
 }
 
 /**
@@ -252,6 +261,16 @@ export class EventBufferCompressionWorker implements EventBuffer {
     return this._finishRequest(this._getAndIncrementId());
   }
 
+  /** @inheritdoc */
+  public finishImmediate(): string {
+    const events = this._pendingEvents;
+
+    // We want to finish this, but just ignore the result
+    void this._finishRequest(this._getAndIncrementId());
+
+    return JSON.stringify(events);
+  }
+
   /**
    * Post message to worker and wait for response before resolving promise.
    */
diff --git a/packages/replay/src/types.ts b/packages/replay/src/types.ts
index dab618c3b349..3fdcd9f519f1 100644
--- a/packages/replay/src/types.ts
+++ b/packages/replay/src/types.ts
@@ -233,6 +233,11 @@ export interface EventBuffer {
    * Clears and returns the contents of the buffer.
    */
   finish(): Promise<ReplayRecordingData>;
+
+  /**
+   * Clear & immediately return the contents of the buffer in a sync way.
+   */
+  finishImmediate(): ReplayRecordingData;
 }
 
 export type AddUpdateCallback = () => boolean | void;