Why Does My Website Keep Going Down? Common Causes and Fixes

Disclosure: This page contains affiliate links. If you purchase a service through one of these links, I may earn a commission at no extra cost to you. I only recommend products and services I have personally evaluated or genuinely believe will help my readers. My opinions are my own, and this disclosure is provided in accordance with FTC guidelines.

Few things are more frustrating than checking your website and being greeted by a blank screen, a timeout error, or the dreaded 503 Service Unavailable page. If you have been asking yourself “why does my website keep going down?” you are not alone. Downtime is one of the most common complaints among website owners, and the causes range from the painfully obvious to the surprisingly obscure.

I have spent years helping people diagnose exactly this problem, and I can tell you that the answer is almost never a single, mysterious gremlin hiding inside your server. It is usually one of a handful of well-known issues, each with a clear fix. In this guide, I will walk you through the most common reasons websites go down, explain why each one happens, and tell you exactly what to do about it.

1. Shared Hosting Resource Limits (The Most Common Culprit)

If I had to bet on one reason your site keeps crashing, this would be it. Shared hosting means your website lives on the same physical server as dozens or even hundreds of other websites. You all share the same CPU, RAM, and disk I/O. When your site (or a neighbor’s site) starts consuming too many resources, the hosting provider throttles or temporarily suspends your account to protect the other tenants.

This often shows up as intermittent downtime. Your site works fine in the morning, goes down around midday, comes back an hour later, and then drops again in the evening. The pattern usually follows traffic peaks, either yours or another site on the same server.

How to fix it: Start by checking your hosting control panel for resource usage reports. Most providers show CPU and memory consumption over time. If you are consistently hitting or exceeding your plan limits, you have two options. The first is to optimize your site by caching pages, compressing images, and reducing the number of plugins or scripts running on each page load. The second, and often more effective, option is to upgrade your hosting. Moving from shared hosting to a VPS gives you dedicated resources that no one else can touch. I recommend looking at InterServer VPS plans, which start at very reasonable prices and give you guaranteed CPU cores and RAM that are entirely yours. If you want to understand the full difference, I wrote a detailed comparison in my guide on shared hosting vs. cloud hosting.

2. Traffic Spikes

Getting a sudden surge of visitors sounds like a good problem to have, and it is, until your server buckles under the load. A single post going viral on social media, a mention on a popular podcast, or even a seasonal spike around a holiday can send more simultaneous requests to your server than it can handle. When that happens, pages load slowly at first, then start timing out, and eventually the server stops responding altogether.

This is different from hitting shared hosting limits in one important way: it can happen on any hosting plan if the traffic exceeds what the server is provisioned to handle. That said, shared hosting is by far the most vulnerable to this problem.

How to fix it: The immediate fix is to put a CDN (Content Delivery Network) like Cloudflare in front of your site. A CDN caches your static content across servers worldwide and absorbs a huge amount of traffic before it ever reaches your origin server. For the long-term, consider a hosting solution that can scale with demand. Cloud hosting and VPS plans with easy vertical scaling let you add more resources temporarily when traffic surges, then scale back down when things settle. An InterServer VPS is a solid foundation here because you can resize your plan as your needs grow, without migrating to a different server.

3. DDoS Attacks

A Distributed Denial of Service attack is when someone intentionally floods your server with so much fake traffic that it cannot serve real visitors. These attacks can range from small, nuisance-level floods to massive assaults that take down even well-provisioned infrastructure. If your site goes down suddenly with no corresponding spike in legitimate traffic, and your server logs show thousands of requests from unusual IP addresses, a DDoS attack is a strong possibility.

How to fix it: First, enable DDoS protection through your hosting provider or a third-party service. Cloudflare’s free tier includes basic DDoS mitigation, and their paid plans offer more robust protection. Most quality VPS and cloud providers also include some level of network-level DDoS filtering. You should also configure rate limiting on your server to cap the number of requests a single IP address can make in a given time window. For a deeper explanation of how these protections work, take a look at my article on what DDoS protection is and why it matters.

4. Server Misconfiguration

Sometimes the problem is not external at all. A misconfigured web server, an incorrect .htaccess file, a PHP memory limit set too low, or a botched update to your server software can all take your site offline. This is especially common after making changes to your hosting environment, such as updating PHP versions, modifying server settings, or installing new server-level software.

The telltale sign of a misconfiguration is that your site goes down immediately after a change and stays down consistently rather than going down intermittently.

How to fix it: Check your server error logs first. On Apache servers, look at the error.log file. On Nginx, check the equivalent log path. These logs almost always contain a specific error message that points you to the exact problem. If you recently made changes, revert them and see if the site comes back. For PHP-based sites like WordPress, common fixes include increasing the PHP memory limit in your php.ini or wp-config.php file, fixing file permissions, and ensuring your .htaccess file has not been corrupted. If you are on a managed hosting plan, your provider’s support team should be able to help you identify and resolve configuration issues quickly.

5. Expired Domain or SSL Certificate

This one is embarrassing when it happens, but it happens more often than you would think. If your domain registration expires, your website simply vanishes from the internet. Visitors see a registrar parking page or a DNS resolution error instead of your site. Similarly, if your SSL certificate expires, modern browsers will block visitors from reaching your site with a full-page security warning that most people will not click through.

How to fix it: Set up auto-renewal for both your domain name and your SSL certificate. Most domain registrars and hosting providers offer this feature. For SSL, if you are using Let’s Encrypt (which is free), make sure your server’s automatic renewal cron job is running correctly. Check it by running a test renewal command. Also, keep your payment information up to date with your registrar and hosting provider. An expired credit card is the most common reason auto-renewals fail.

6. Hosting Provider Issues

Sometimes the problem is completely out of your hands. Your hosting provider’s hardware can fail, their data center can experience network issues, or they can have software problems on their end that affect your server. Even the best hosting companies experience occasional outages. The question is how often it happens and how quickly they resolve it.

How to fix it: Check your provider’s status page when your site goes down. Most hosts maintain a public status page or have a Twitter/X account where they post about ongoing issues. If your provider experiences frequent outages, it is time to seriously consider switching. I will cover this more in the “When to Switch Hosts” section below. Understanding how web hosting uptime works and what guarantees to look for will help you evaluate whether your current provider is meeting acceptable standards.

7. Plugin or Theme Conflicts

If you are running a CMS like WordPress, Joomla, or Drupal, plugins and themes are a frequent source of downtime. A plugin update can introduce a bug, two plugins can conflict with each other, or a theme can be incompatible with your current PHP version. The result is usually a white screen of death or a critical error message.

How to fix it: If your site went down right after updating a plugin or theme, the fix is straightforward. Access your site via FTP or your hosting file manager and rename the folder of the offending plugin or theme. This effectively deactivates it and should bring your site back online. From there, you can troubleshoot the conflict. To prevent this in the future, always take a backup before updating plugins or themes, and consider using a staging environment to test updates before applying them to your live site. Avoid using nulled or pirated themes and plugins, as they frequently contain malicious code that can crash your site or worse.

8. Database Overload

Every dynamic website relies on a database to store and retrieve content. Over time, databases can become bloated with post revisions, spam comments, transient data, and orphaned metadata. When the database grows large and unoptimized, queries take longer to execute, connections pile up, and eventually the database server becomes unresponsive. Your website then throws a “Error Establishing a Database Connection” message or simply times out.

How to fix it: Start by optimizing your database tables. In WordPress, plugins like WP-Optimize can clean up revisions, spam, and transient data with a few clicks. For other platforms, use phpMyAdmin to run an OPTIMIZE TABLE command on your largest tables. If your site has a lot of traffic and your database is on the same server as your web files, consider moving the database to a separate server or using a managed database service. Also, make sure your database connection limits are set appropriately for your traffic level. On shared hosting, these limits are often very restrictive, which is yet another reason upgrading to a VPS can solve persistent downtime problems.

How to Monitor Uptime

You should not have to manually check whether your site is up every few hours. Uptime monitoring tools do this automatically and alert you the moment something goes wrong. Here are the tools I recommend:

• UptimeRobot — The most popular free option. It checks your site every five minutes and sends email, SMS, or Slack alerts when it detects downtime. The free plan monitors up to 50 sites, which is more than enough for most people.
• Pingdom — A more feature-rich paid option from SolarWinds. Pingdom provides detailed response time reports, root cause analysis, and checks from multiple global locations. It is a good choice if you need professional-grade reporting.
• Better Uptime (now part of Better Stack) — Combines uptime monitoring with incident management and status pages. The free tier is generous and the interface is clean and modern.
• Hetrix Tools — Offers free uptime monitoring with checks from multiple locations and a built-in blacklist monitor, which is useful if you are concerned about email deliverability too.
• StatusCake — Another solid free option with page speed monitoring in addition to uptime checks.

Set up at least one of these tools and configure alerts to go to your email and your phone. The faster you know about downtime, the faster you can fix it. Over time, the data these tools collect also helps you identify patterns. You might discover that your site goes down every day at the same time, which points you toward a scheduled process or a predictable traffic pattern as the root cause.

When to Switch Hosts

Not every instance of downtime means you need a new host. But there are clear signals that your current provider is the problem rather than just the messenger.

Switch hosts if:

• Your provider’s uptime over the past three months is below 99.9%. Anything less than that translates to over 40 minutes of downtime per month, which is unacceptable for any site that matters to you.
• Support responses take hours or days when your site is down. During a downtime event, response time is everything. If your host cannot get back to you within an hour during an outage, they do not value your business.
• You experience repeated outages that are clearly on the provider’s end (their status page confirms server or network issues) and the situation does not improve over two or three months.
• You have outgrown shared hosting and your provider does not offer a clear upgrade path to VPS or cloud hosting at a reasonable price.
• Your provider has been acquired, changed ownership, or made significant infrastructure changes that have degraded performance.

When you do switch, migrate to a host that offers the resources you actually need. If you have been fighting shared hosting limits, move to a VPS. InterServer’s VPS hosting is a provider I point people toward because of their price-lock guarantee, solid uptime track record, and the fact that you get root access with genuine dedicated resources rather than an oversold shared environment wearing a VPS label.

Frequently Asked Questions

How much downtime is considered normal?

Industry standard is 99.9% uptime, which allows for roughly 8 hours and 45 minutes of downtime per year, or about 43 minutes per month. Most reputable hosting providers guarantee at least this level. If your site is down more often than that, something is wrong and it is worth investigating. Brief, occasional downtime during scheduled maintenance windows is normal and expected. Frequent, unplanned downtime is not.

Can too many plugins really crash my website?

Yes, absolutely. Each plugin you install adds code that runs on every page load, consuming server memory and CPU cycles. Even well-coded plugins add some overhead, and poorly coded ones can consume resources exponentially. Beyond raw resource usage, plugin conflicts are a leading cause of the white screen of death in WordPress. The fix is to keep only the plugins you truly need, delete the ones you are not using, and always test updates in a staging environment before applying them to your live site.

Is free hosting reliable enough for a business website?

No. Free hosting providers typically offer no uptime guarantee, severely limited resources, little to no support, and often place ads on your site. For any website that represents your business, generates revenue, or serves customers, you need paid hosting at a minimum. A basic VPS plan costs roughly the same as a few cups of coffee per month and gives you dramatically better performance, reliability, and control.

Will a CDN prevent my site from going down?

A CDN significantly reduces the risk of downtime by caching your content on servers around the world and absorbing traffic before it reaches your origin server. It is extremely effective against traffic spikes and certain types of DDoS attacks. However, a CDN is not a substitute for reliable hosting. If your origin server has database problems, software errors, or hardware failures, a CDN cannot fix those. Think of a CDN as an important layer of protection that works best alongside solid hosting infrastructure.

How do I know if my site is being DDoS attacked versus just getting a lot of real traffic?

Check your server access logs and your analytics side by side. A traffic spike from real visitors will show up in Google Analytics or your analytics platform of choice with normal browsing patterns: different pages viewed, reasonable session durations, and traffic from recognizable referral sources. A DDoS attack will show up in your server logs as massive numbers of requests, often to the same URL, from many different IP addresses, with little to no corresponding activity in your analytics dashboard. The disconnect between server-level traffic and analytics-reported traffic is the clearest indicator that the requests are not coming from real humans.

Final Thoughts

Website downtime is not something you should just accept as a cost of doing business online. Every minute your site is down, you are potentially losing visitors, customers, search engine rankings, and credibility. The good news is that most causes of downtime are well-understood and fixable.

Start by identifying which of the issues above matches your symptoms. Set up monitoring so you have data to work with instead of guessing. Optimize what you can on your current setup, and if you have outgrown your hosting plan, do not hesitate to upgrade. Moving from shared hosting to a proper VPS is the single most impactful change most website owners can make for reliability, and it does not have to break the bank.

Your website is the foundation of your online presence. Keep it standing.