Slack Not Loading or Messages Not Sending: Fixes in Order

If Slack is not loading or messages will not send, check Slack Status at slack-status.com first. If there is no known issue, run Slack’s connection test at slack.com/help/test. If the test passes and the desktop app still misbehaves, clear its cache with Help > Troubleshooting > Clear Cache and Restart.

Those three steps come from Slack’s Help Center article on connection issues. Our live Slack status page shows recent reports alongside the official page.

Is Slack down right now?

1. Open slack-status.com, Slack’s official page for known issues it is working to resolve.
2. Check our Slack status page for reports from other users.
3. Open Slack in a web browser. If the browser version works and the desktop app does not, the problem is the app.
4. Ask a coworker on another network whether they can load Slack.

The general method is in is it down or just me. How to read the incident wording is in how to read a status page.

How do I test my connection to Slack?

Go to slack.com/help/test in a browser. Slack’s article says the test checks your connection to Slack, and if it reports errors you should contact your network administrator. On a work or school network, a firewall or proxy can block Slack’s connections, and only the administrator can change that. Do not turn off security software to get around it.

How do I clear the Slack desktop app cache?

Slack documents these steps for the desktop app:

1. Click Help in your computer’s top menu bar. On Windows 10, click the three-line menu icon in the top left of the app instead.
2. Select Troubleshooting.
3. Click Clear Cache and Restart.

If the problem persists, the same menu has Restart and Collect Net Logs. Slack’s article says to click Stop Logging when the issue occurs, then send the zip file from your Downloads folder to Slack support. Only send logs through Slack’s official support channels.

Why are my Slack messages not sending?

Messages fail to send when the app loses its connection or when Slack has a service problem. Check these points:

1. Look at the connection indicator and your Wi-Fi. Switch to mobile data briefly to test.
2. Turn off any VPN for a minute and retry. If that fixes it, tell your IT team.
3. Copy your unsent message so you do not lose it, then restart Slack.
4. Try the web version to see if the message sends there.
5. If a single channel fails, ask a workspace admin; channel permissions can also stop posting.

What you see	Likely cause	Try
Slack Status lists an issue	Slack side	Wait, follow updates
Connection test reports errors	Your network	Contact network administrator
Browser works, app does not	App cache or install	Help > Troubleshooting > Clear Cache and Restart
Works on mobile data only	Wi-Fi or filter	See mobile data vs Wi-Fi

What if Slack loads but is slow or stuck?

A slow or half-loaded Slack can come from a weak connection, a busy VPN or a stale cache. Start with the connection test at slack.com/help/test, then try the web version, then clear the cache as above. If the status page lists an incident for messaging or connections, the slowdown is on Slack’s side, and clearing the cache will not help.

What if Slack works for coworkers but not for me?

Then the fault is likely specific to your device, your account or your connection. Compare notes:

1. Is the coworker on the same network? If yes and they have no trouble, the problem is your device or account.
2. Do you use a different browser or app version? Update the app.
3. Have you changed your password or been signed out? Sign in again through the official Slack sign-in page.
4. Is a VPN or extension on your device? Turn it off for a minute as a test.

Never share your sign-in code or magic link with anyone, including someone claiming to be from Slack support. Real workspace changes go through your workspace admin.

How do I keep working while Slack is down?

If Slack Status confirms an incident, move urgent messages to email, phone or your team’s backup channel, and write down what you tried to send so nothing is lost. Do not reinstall Slack or reset your device; it will not help with a service problem. Keep an eye on the incident updates and our Slack status page, and resend messages when service is restored.

If an outage also affects your bank, school or other tools, the same habits apply across all of them; the two-minute check works for any service. When Slack returns, scroll back through the channels you missed, because messages sent from other people’s devices during a partial outage may arrive late and out of order.

Bottom line

Check slack-status.com, run the connection test, compare the browser with the app, and clear the desktop cache. Reinstall Slack only from the official download page or your device’s app store.

FAQ

Does clearing the cache delete my messages?

No. Slack’s menu option clears local cached data and restarts the app. Your messages live in your workspace.

Why does Slack work on my phone but not my computer?

The service is up. The fault is on the computer: its network settings, VPN, firewall or app cache.

Who can fix a firewall block?

Only your network administrator. Slack’s own article tells you to contact them when the connection test shows errors.

What should I do during a long Slack outage?

Move urgent messages to email or phone, then see what to do during an outage.