You close your laptop at the end of the day, open it the next morning, and every site wants you to sign in again. Email. The shop where your basket was full. The forum you were halfway through reading. Nothing is broken, and nobody has hacked you. Something — often something you switched on yourself — is quietly wiping the small files that tell websites who you are.
Staying signed in works because your browser keeps a cookie from each site. Lose that cookie, and the site has no memory of you, so the sign-in screen comes back. That makes the real question a sharper one: not “why did I get signed out?” but “what keeps deleting my cookies?” Here is how to find it.
First, notice the pattern — it tells you the cause
Before touching any setting, pay attention to where the sign-outs are happening:
- Every site, every time you close the browser. Your browser is almost certainly wiping site data on exit. This is the most common cause, and the fix takes a minute.
- One site only, over and over. The problem is that site’s own saved data — or the site itself. A targeted clear usually fixes it.
- Everything at once, on all your devices, out of nowhere. You changed your password, or something happened to the account. Skip to the account section below.
The pattern is the diagnosis. Most people skip this and start clearing things at random, which is how they end up signed out of every site — including the ones that were working fine.
The usual suspect: your browser is set to forget everything on close
This setting exists in every major browser, and it does exactly what it says. People switch it on during a privacy-conscious afternoon and forget it was ever there. Check yours:
Chrome: Settings → Privacy and security → Site settings → Additional content settings → On-device site data. If “Delete data sites have saved to your device when you close all windows” is selected, switch it back to “Allow sites to save data on your device”. Google’s own help page describes the delete option as making sites “less likely to remember you from one visit to the next” — that is your symptom, described by Google itself.
Edge: Settings → Privacy, search, and services → Clear browsing data → “Choose what to clear every time you close the browser”. If “Cookies and other site data” is switched on, every exit signs you out of everything. Edge also lets you add exceptions under “Don’t clear” for the sites you want to stay signed in to, which is the best of both worlds.
Firefox: Settings → Privacy & Security, and look for “Delete cookies and site data when Firefox is closed”. Untick it. Firefox also honours exceptions — add the sites you trust under Manage Exceptions and their cookies survive even with the stricter setting enabled.
Safari on iPhone: Settings → Apps → Safari → Advanced. If “Block All Cookies” is turned on, turn it off. Apple warns that with cookies blocked, “you will likely not be able to sign in to a site, even when using your correct username and password.”
One that isn’t a mistake: private or incognito windows always forget you when closed. That is their entire job. If your sign-ins only vanish in the dark window, nothing is wrong.
The cleaners doing it behind your back
If the browser settings above look innocent, look at what else runs on your device. Privacy extensions that promise to delete trackers sometimes take “delete my cookies” literally and do it on a schedule. Phone “cleaner” apps and desktop utilities do the same thing. Anything whose job description includes clearing, cleaning, or boosting is a suspect. Most of them let you whitelist sites you want to stay signed in to — worth the two minutes it takes to set that up.
You probably skipped the “Remember me” box
At sign-in, most sites offer a “Remember me” or “Keep me signed in” checkbox, and it matters more than it looks. Without it, many sites only keep you signed in for the session — close the browser and you’re out, even with perfect cookie settings. After the on-close wipe, this is the most overlooked cause of repeat sign-outs. There is more nuance to what that box actually does than most people realise — worth a read: What the “Remember Me” Checkbox Actually Does.
Sometimes the site signed you out on purpose
Not every sign-out is a setting. Some are the service doing its job:
- You changed or reset your password. Most services sign out all your devices when you do — which is exactly what you want if the change was prompted by a scare.
- Banks and financial sites time out sessions by design. Nothing to fix; logging back in is the expected behaviour.
- You’ve hit a device limit. Some services cap how many devices can stay signed in, and the oldest session gets quietly dropped.
- A sudden sign-out you didn’t cause deserves a second look. If your email or bank signed you out everywhere on its own, don’t just sign back in — change the password and review the account’s active sessions first. An unexplained sign-out can be the first visible sign of someone else getting in: Your Phone Says “Is This You Signing In?” — When It Isn’t You.
Location changes can trigger it too. Sign in from somewhere very different than usual — a VPN routed through another country, for example — and some sites ask you to prove it’s you again. That’s sites reading your IP address, which reveals more than most people think: Websites Can Guess Your City From Your IP — But Not Much Else.
Only one site forgetting you? Clear just that site, not everything
The nuclear option — clearing all cookies — signs you out of every site at once, which is the opposite of what you want. A corrupted cookie for one site is a common cause of repeat logouts there, and every browser lets you remove a single site’s data:
- Firefox: Settings → Privacy & Security → Cookies and Site Data → Manage Data, search for the site, Remove Selected.
- Safari on iPhone: Settings → Apps → Safari → Advanced → Website Data, find the site, swipe left, Delete.
- Chrome: open chrome://settings/siteData, search for the site, delete its entries.
Sign back in once, tick “remember me”, and that site usually behaves.
The odd one: check your computer’s clock
This sounds unrelated, but a computer whose date is set wrong can treat saved sign-ins as expired — cookies carry expiry dates, and the browser compares them against your system clock. If the logouts started after a dead battery, a factory reset, or a trip across time zones, check that date and time are set to update automatically. It’s a thirty-second check that solves a surprising number of “impossible” sign-outs.
Most repeat sign-outs come down to one of two things: a browser setting wiping cookies on close, or a skipped “Remember me” box. Check those first and you’ll have it solved in minutes. And remember the one exception to this whole article: on a shared or public computer, getting signed out is the feature working as intended. Staying signed in there is the actual problem.
