# Is it safe to delete Slack’s Service Worker cache on Mac?

- URL: https://moreroom.app/folders/slack-service-worker
- Item: Slack offline cache
- Location: `~/Library/Application Support/Slack/Service Worker/CacheStorage`
- Verdict: Safe to remove — Rebuilt or re-downloaded automatically when needed.
- Comes back on its own: yes
- Source: MoreRoom rules catalogue (2026-10-17), by Yando Pte. Ltd.

## What is it?

Data the Slack app stores through a service worker so it starts quickly and copes with brief offline moments: app code and cached workspace resources. It can grow to hundreds of MB or more.

## What happens if you delete it?

Rebuilt on the next launch; Slack may start more slowly and needs a connection the first time.

## How to remove it properly

Quit Slack, then move `~/Library/Application Support/Slack/Service Worker/CacheStorage` to the Trash.