diff --git a/backend/routes/sessions.js b/backend/routes/sessions.js
index 9d31b36..fed226b 100644
--- a/backend/routes/sessions.js
+++ b/backend/routes/sessions.js
@@ -179,6 +179,62 @@ router.post('/', authenticateToken, (req, res) => {
   }
 });
 
+// Bulk session operations (admin only)
+router.post('/bulk', authenticateToken, (req, res) => {
+  try {
+    const { action, ids } = req.body;
+
+    if (!Array.isArray(ids) || ids.length === 0) {
+      return res.status(400).json({ error: 'ids must be a non-empty array' });
+    }
+
+    const validActions = ['archive', 'unarchive', 'delete'];
+    if (!validActions.includes(action)) {
+      return res.status(400).json({ error: `action must be one of: ${validActions.join(', ')}` });
+    }
+
+    const placeholders = ids.map(() => '?').join(',');
+    const sessions = db.prepare(
+      `SELECT id, is_active FROM sessions WHERE id IN (${placeholders})`
+    ).all(...ids);
+
+    if (sessions.length !== ids.length) {
+      const foundIds = sessions.map(s => s.id);
+      const missingIds = ids.filter(id => !foundIds.includes(id));
+      return res.status(404).json({ error: 'Some sessions not found', missingIds });
+    }
+
+    if (action === 'archive' || action === 'delete') {
+      const activeIds = sessions.filter(s => s.is_active === 1).map(s => s.id);
+      if (activeIds.length > 0) {
+        return res.status(400).json({
+          error: `Cannot ${action} active sessions. Close them first.`,
+          activeIds
+        });
+      }
+    }
+
+    const bulkOperation = db.transaction(() => {
+      if (action === 'archive') {
+        db.prepare(`UPDATE sessions SET archived = 1 WHERE id IN (${placeholders})`).run(...ids);
+      } else if (action === 'unarchive') {
+        db.prepare(`UPDATE sessions SET archived = 0 WHERE id IN (${placeholders})`).run(...ids);
+      } else if (action === 'delete') {
+        db.prepare(`DELETE FROM chat_logs WHERE session_id IN (${placeholders})`).run(...ids);
+        db.prepare(`DELETE FROM live_votes WHERE session_id IN (${placeholders})`).run(...ids);
+        db.prepare(`DELETE FROM session_games WHERE session_id IN (${placeholders})`).run(...ids);
+        db.prepare(`DELETE FROM sessions WHERE id IN (${placeholders})`).run(...ids);
+      }
+    });
+
+    bulkOperation();
+
+    res.json({ success: true, affected: ids.length });
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
+});
+
 // Close/finalize session (admin only)
 router.post('/:id/close', authenticateToken, (req, res) => {
   try {
diff --git a/tests/api/session-archive.test.js b/tests/api/session-archive.test.js
index d6ae450..ecccf26 100644
--- a/tests/api/session-archive.test.js
+++ b/tests/api/session-archive.test.js
@@ -171,3 +171,134 @@ describe('POST /api/sessions/:id/unarchive', () => {
     expect(res.status).toBe(404);
   });
 });
+
+describe('POST /api/sessions/bulk', () => {
+  beforeEach(() => {
+    cleanDb();
+  });
+
+  test('bulk archive multiple sessions', async () => {
+    const s1 = seedSession({ is_active: 0, notes: null });
+    const s2 = seedSession({ is_active: 0, notes: null });
+
+    const res = await request(app)
+      .post('/api/sessions/bulk')
+      .set('Authorization', getAuthHeader())
+      .send({ action: 'archive', ids: [s1.id, s2.id] });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.affected).toBe(2);
+
+    const list = await request(app).get('/api/sessions?filter=archived');
+    expect(list.body).toHaveLength(2);
+  });
+
+  test('bulk unarchive multiple sessions', async () => {
+    const s1 = seedSession({ is_active: 0, notes: null });
+    const s2 = seedSession({ is_active: 0, notes: null });
+    const db = require('../helpers/test-utils').db;
+    db.prepare('UPDATE sessions SET archived = 1 WHERE id IN (?, ?)').run(s1.id, s2.id);
+
+    const res = await request(app)
+      .post('/api/sessions/bulk')
+      .set('Authorization', getAuthHeader())
+      .send({ action: 'unarchive', ids: [s1.id, s2.id] });
+
+    expect(res.status).toBe(200);
+    expect(res.body.affected).toBe(2);
+
+    const list = await request(app).get('/api/sessions?filter=all');
+    expect(list.body.every(s => s.archived === 0)).toBe(true);
+  });
+
+  test('bulk delete multiple sessions', async () => {
+    const s1 = seedSession({ is_active: 0, notes: null });
+    const s2 = seedSession({ is_active: 0, notes: null });
+
+    const res = await request(app)
+      .post('/api/sessions/bulk')
+      .set('Authorization', getAuthHeader())
+      .send({ action: 'delete', ids: [s1.id, s2.id] });
+
+    expect(res.status).toBe(200);
+    expect(res.body.affected).toBe(2);
+
+    const list = await request(app).get('/api/sessions?filter=all');
+    expect(list.body).toHaveLength(0);
+  });
+
+  test('rejects archive of active sessions', async () => {
+    const active = seedSession({ is_active: 1, notes: null });
+    const closed = seedSession({ is_active: 0, notes: null });
+
+    const res = await request(app)
+      .post('/api/sessions/bulk')
+      .set('Authorization', getAuthHeader())
+      .send({ action: 'archive', ids: [active.id, closed.id] });
+
+    expect(res.status).toBe(400);
+    expect(res.body.activeIds).toContain(active.id);
+
+    const list = await request(app).get('/api/sessions?filter=all');
+    expect(list.body).toHaveLength(2);
+    expect(list.body.every(s => s.archived === 0)).toBe(true);
+  });
+
+  test('rejects delete of active sessions', async () => {
+    const active = seedSession({ is_active: 1, notes: null });
+
+    const res = await request(app)
+      .post('/api/sessions/bulk')
+      .set('Authorization', getAuthHeader())
+      .send({ action: 'delete', ids: [active.id] });
+
+    expect(res.status).toBe(400);
+  });
+
+  test('returns 400 for empty ids array', async () => {
+    const res = await request(app)
+      .post('/api/sessions/bulk')
+      .set('Authorization', getAuthHeader())
+      .send({ action: 'archive', ids: [] });
+
+    expect(res.status).toBe(400);
+  });
+
+  test('returns 400 for invalid action', async () => {
+    const res = await request(app)
+      .post('/api/sessions/bulk')
+      .set('Authorization', getAuthHeader())
+      .send({ action: 'nuke', ids: [1] });
+
+    expect(res.status).toBe(400);
+  });
+
+  test('returns 400 for non-array ids', async () => {
+    const res = await request(app)
+      .post('/api/sessions/bulk')
+      .set('Authorization', getAuthHeader())
+      .send({ action: 'archive', ids: 'not-array' });
+
+    expect(res.status).toBe(400);
+  });
+
+  test('returns 404 if any session ID does not exist', async () => {
+    const s1 = seedSession({ is_active: 0, notes: null });
+
+    const res = await request(app)
+      .post('/api/sessions/bulk')
+      .set('Authorization', getAuthHeader())
+      .send({ action: 'archive', ids: [s1.id, 9999] });
+
+    expect(res.status).toBe(404);
+  });
+
+  test('returns 401 without auth', async () => {
+    const res = await request(app)
+      .post('/api/sessions/bulk')
+      .send({ action: 'archive', ids: [1] });
+
+    expect(res.status).toBe(401);
+  });
+});