OnlineDeveloperTool
Website Checking

Website Status Checker

Check whether a website or URL is reachable from your browser.

Updated

Tip: press Ctrl+Enter (or Cmd+Enter) to run the check. Without https:// or http://, https:// is used.

How this check works: your browser sends a lightweight HEAD request directly to the address you enter. Nothing is sent to our servers, but the site you check will see a request from your IP address.

Limits: the result reflects what your browser and network can reach, not a worldwide uptime measurement. A site that is down for others may load for you, and the reverse. If a site does not allow browsers to read its response, we can confirm it answered but not its HTTP status code.

This tool runs in your browser. No account or signup is required.

Common Website Status Checker tasks

Developers typically reach for this page when they need to check if a website is up or down; check HTTP status code online; test website response time. The tool is built for quick, practical work rather than a generic demo.

What matters in a website status checker workflow

When developers compare online tools for this job, the useful capabilities tend to center on HTTP status, response time, redirects, URL normalization. This page keeps those practical needs in mind while linking to related tools when a different workflow is a better fit.

What is Website Status Checker?

Website Status Checker sends a lightweight request from your browser to each address you enter and reports whether it answered, the HTTP status when the site allows it, any redirect and the response time.

What problem does it solve?

When a page will not load you want to know whether it is the site, your network or a typo, without opening five different "is it down" sites.

How to use Website Status Checker

  1. Enter one or more domains or URLs, one per line.
  2. Press Check status (or Ctrl/Cmd + Enter).
  3. Read each result and copy them all with Copy results.

Example

Input

example.com
https://example.com/some/path

Output

One result per line: status label, HTTP status (when readable), redirect target and response time.

What you can do with Website Status Checker

  • Is my website down
  • Check website status
  • URL reachability check

Common use cases

  • Checking whether a site is reachable after a deploy
  • Telling a DNS or network issue from a typo
  • Spot-checking several URLs at once

Related developer tasks

  • Is my website down
  • Check website status
  • URL reachability check

How the website status checker works

Your browser sends a HEAD request to each address you enter, up to 10 at a time, and waits up to 12 seconds. There is no server of ours in between, so the result reflects what your own network can reach.

  • Up: the server answered with a normal status code.
  • Online (client error): the server answered with a 4xx code, so the site is alive but that address returned an error.
  • Server error: a 5xx code, so the server is reachable but reporting a problem.
  • Unreachable or timeout: the browser could not connect, or the request took too long.

Limits to keep in mind

  • Many sites block cross-origin reads. In that case the tool can only tell whether the server answered, not the exact status code.
  • http:// addresses cannot be checked from this https:// page.
  • A site that is down for others can still load for you, and the reverse. It is not a worldwide uptime monitor.

Related: URL Encoder, Query String Parser, Timestamp Converter

Website Status Checker FAQ

Is this a worldwide uptime check?

No. It tests what your own browser and network can reach. A site that is down for others may load for you, and the reverse.

Why is there no HTTP status for some sites?

Some sites do not let browsers read their response. We can tell that the site answered, but not its status code.

How many addresses can I check at once?

Up to 10, one per line.

Is it down for everyone or just me?

The tool only tests from your own browser and network. Try it from another network or device to compare.

Looking for something else? Browse all developer tools.

onlinedevelopertool.com is a collection of 54 free, browser-based utilities for the small jobs that interrupt real work: formatting a JSON response, decoding a token, converting a timestamp, generating a UUID or checking a hash. Each tool has its own page with a short explanation, a worked example and answers to common questions, so you can use it and learn what it does at the same time.

There is no account to create and nothing to install. Tools run in your browser, so the text you paste is processed on your own device. The one exception is the Website Status Checker, which sends a request from your browser to the address you enter.

Three steps: paste your input, click the tool, copy the result, all inside your browser
Popular developer utilities: JWT decoder, UUID generator, Base64 decoder, SHA-256 hash, regex tester and timestamp converter

What you can do here

  • JSON Tools

    Format, validate, beautify and minify JSON, generate C#, TypeScript, Java, Python, Go, PHP and Kotlin models from it, or convert between JSON, YAML and CSV.

  • Encoders & Decoders

    URL, Base64 and HTML encoding and decoding, plus a JWT decoder for reading token claims.

  • Generators & Hashes

    Generate UUIDs and JWTs, validate UUIDs, and create MD5, SHA-256 and SHA-512 hashes.

  • Web Tools

    Timestamps, color codes, query strings and cron expressions - the small things web work keeps throwing at you.

  • Text & Data

    Format XML and YAML, count text, change case, make slugs, test regex, diff two texts and convert number bases.

  • Website Checking

    Check whether a website or URL is reachable from your browser.

Quick developer reference

  • JSON

    Keys and strings must use double quotes, and trailing commas and comments are not allowed. Those are the three most common reasons a payload fails to parse.

    Validate JSON

  • JWT

    A JSON Web Token is three Base64URL parts joined by dots: header, payload and signature. Decoding shows the claims but does not prove the token is genuine; only signature verification does.

    Decode a JWT

  • Base64

    Base64 is an encoding, not encryption. Anyone can reverse it, and it makes data roughly one third larger, so never use it to hide secrets.

    Decode Base64

  • UUID

    A version 4 UUID is made of random bits and written as 8-4-4-4-12 hexadecimal characters. Collisions are astronomically unlikely, which is why they work well as identifiers.

    Generate a UUID

  • Timestamps

    A Unix timestamp counts time since 1 January 1970 UTC. Ten digits usually means seconds and thirteen digits usually means milliseconds.

    Convert a timestamp

  • Hashes

    MD5 is fine for quick checksums but is not safe for security. Prefer SHA-256 or SHA-512, and remember that hashing is one-way and is not encryption.

    Create a SHA-256 hash

Missing a tool you need? Visit the contact page and tell us what you reach for most often. You can also browse every tool or read the About page to see how the site is built and what it does with your data.