How it works
Enter a URL or switch to bulk mode
Type a single URL into the input field, or click Bulk Check to paste multiple URLs (one per line).
Configure options
Choose whether to follow redirects and optionally add a custom timeout.
Click Check Status
Press the Check button to start the request. Results appear instantly with status code, status text, response time, and headers.
Export or copy results
Copy individual results or export all results as CSV or JSON for further analysis.
Checking HTTP status in code — how it works
Here's how to check HTTP status codes programmatically using the Fetch API and other methods:
What is an HTTP Status Checker and why you need it
An HTTP status checker is a tool that sends a request to a URL and displays the server's response status code, headers, and response time. This helps you monitor website uptime, verify that redirects are working correctly, diagnose server errors, and audit your site's health. This URL status checker works for single URLs and bulk lists, making it perfect for site audits.
HTTP status codes are the language servers use to tell browsers and tools what happened to a request. A 200 OK means everything worked. A 301 Moved Permanently or 302 Found indicates a redirect. A 404 Not Found means the page is missing. A 500 Internal Server Error means something broke on the server side. Understanding these codes is essential for maintaining a healthy website.
💡 Key takeaways
- Free HTTP status checker for single URLs and bulk lists
- Shows status code, status text, response time, and full headers
- Option to follow or ignore redirects — see the full chain
- 100% browser-based — your URL data never leaves your device
HTTP status codes explained — what each range means
HTTP status codes are grouped into five classes, each with a specific meaning:
| Range | Class | Meaning |
|---|---|---|
| 1xx | Informational | The request was received and is being processed |
| 2xx | Success | The request succeeded — 200 OK is the ideal response |
| 3xx | Redirection | The resource has moved — 301 (permanent) and 302 (temporary) are most common |
| 4xx | Client Error | The request is invalid — 404 (Not Found) and 403 (Forbidden) are typical |
| 5xx | Server Error | The server failed to fulfill the request — 500 (Internal Server Error) is the most common |
HTTP status code classes and what they mean
Common HTTP status codes every developer should know
- 1200 OK — The request succeeded. The page or resource is available and working correctly.
- 2301 Moved Permanently — The resource has permanently moved to a new URL. This passes SEO value to the new location.
- 3302 Found — The resource is temporarily at a different URL. This does not pass SEO value for the move.
- 4304 Not Modified — The resource hasn't changed since the last request. Used for caching.
- 5400 Bad Request — The server could not understand the request due to invalid syntax.
- 6401 Unauthorized — Authentication is required to access the resource.
- 7403 Forbidden — Access to the resource is denied, even with authentication.
- 8404 Not Found — The requested resource could not be found on the server.
- 9500 Internal Server Error — The server encountered an error and could not complete the request.
- 10503 Service Unavailable — The server is temporarily unavailable (often due to overload or maintenance).
Why response time matters for SEO and user experience
Response time — also known as Time To First Byte (TTFB) — is the time it takes for a server to respond to a request. Google considers page speed and TTFB as ranking factors. A faster response time leads to better Core Web Vitals scores, higher user engagement, and improved search rankings. This tool displays the response time for each URL you check, helping you identify slow-performing pages and server issues.
TTFB benchmarks: under 100ms is excellent, 100-300ms is good, 300-600ms is acceptable, and over 600ms needs optimization. If you notice consistently high response times, consider upgrading your hosting, using a CDN, or optimizing your server-side code.
Pro tip: Use the bulk check mode to audit your entire website's status codes and response times. Export the results as CSV and analyze them in a spreadsheet to identify broken links, slow pages, and redirect chains that need fixing.
Understanding redirects and chains — why they matter for SEO
Redirect chains occur when a URL redirects to another URL, which then redirects to another, and so on. Each redirect in the chain adds latency and can dilute SEO value. This tool's option to follow redirects lets you see the entire chain and the final destination. For optimal performance and SEO, keep redirect chains to a minimum — ideally one redirect per URL, or none at all.
When you check a URL with redirect following enabled, the tool shows you the final URL, the final status code, and the response time for the entire chain. If you want to see each redirect step individually, disable "Follow redirects" and check each URL in the chain separately.
Monitoring website uptime and health with this tool
Regularly checking your website's status codes is a simple but effective way to monitor uptime and health. Use this tool to:
- 1Detect broken links — 404 errors on your site frustrate users and hurt SEO. Check all internal and external links periodically.
- 2Verify redirects — Ensure that 301 redirects are correctly forwarding to the intended destinations without long chains.
- 3Monitor server health — 500 and 503 errors indicate server-side problems that need immediate attention.
- 4Audit your CDN and hosting — Check response times from different regions to ensure your infrastructure is performing well.
How this HTTP status checker compares to alternatives
Many online status checkers require API keys, limit the number of requests, or upload your data to their servers. This tool is completely free, unlimited, and 100% browser-based. It supports both single and bulk checks, shows full headers, measures response time, and lets you export results as CSV or JSON. There are no sign-ups, no usage limits, and no data uploads — everything runs locally in your browser.
Unlike command-line tools like cURL, this tool provides a clean visual interface with color-coded status indicators and easy copy/export functionality. It's ideal for developers, SEO professionals, site owners, and students who need a quick, reliable way to check HTTP status codes.
Why choose our tool?
100% Private
Everything runs in your browser. Your URL data never leaves your device — no uploads, no server processing, no tracking.
Instant Results
No loading screens, no waiting, no queues. Results appear the moment you click — powered by client-side JavaScript.
No Sign-Up Ever
No accounts, no emails, no passwords. Just open the page and start using it — forever free, no strings attached.
Works Everywhere
Phone, tablet, laptop, desktop — any browser, any OS. Fully responsive and works offline once loaded.