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Website Tools

Check the live status, HTTP headers, and technical health of any website.

19 tools in this category

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SSL Tools 3 DNS Tools 12 Domain Tools 12 Website Tools 19 Security Tools 10 Email Tools 8 Performance Tools 10 SEO Tools 12 API & Developer Testing Tools 17 Git & GitHub Tools 18 DevOps Tools 16 Linux & System Administration Tools 17 Database & SQL Tools 20 AWS & Cloud Tools 16 Kubernetes Tools 14 Programming Language Tools 23 Frontend / CSS Tools 20 Image / SVG Developer Tools 18 Security & Authentication Tools 14 File & Data Conversion Tools 20 Data / Number / Computer Science Tools 19 Software Version / Package Tools 9 Developer Documentation / Project Tools 11 Byte Array Tools 17 Text & Writing Tools 28 Finance & Loan Calculators 20 PDF Tools 16 Image Editing Tools 12
Run All Website Tools Checks

Website Status Checker

Instantly check any website's uptime status, HTTP status code, and response time.

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IP Address Lookup

Look up a website's server IP address, IPv4/IPv6, and reverse DNS.

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HTTP Status Checker

Check the HTTP status code any website returns.

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HTTP Headers Checker

View every HTTP response header a website sends.

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Redirect Checker

Check whether a website redirects and where it ends up.

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Website Response Time Checker

Check how fast a website responds to a request.

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Robots.txt Checker

Check whether a website has a robots.txt file and view its contents.

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Sitemap Checker

Check whether a website has an XML sitemap.

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Favicon Checker

Check whether a website has a favicon set up correctly and see exactly where it's loading...

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Website Technology Checker

Detect the CMS, JavaScript framework, analytics tools, and server technology a website use...

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HTML Validator

Check a webpage's HTML for structural errors, missing tags, and accessibility issues.

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CSS Validator

Check a webpage's CSS (inline and linked stylesheets) for common syntax issues.

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URL Encoder / Decoder

Instantly encode or decode URLs and query strings, right in your browser.

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Base64 Encoder / Decoder

Instantly encode or decode Base64 text, right in your browser.

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Unix Timestamp Converter

Instantly convert Unix timestamps to human-readable dates, and back, right in your browser...

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Broken Link Checker

Check a page for broken outbound links.

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Website Charset Checker

Check a website's declared character encoding (charset) - HTTP header and HTML meta tag.

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HTML Minifier

Instantly minify HTML by removing unnecessary whitespace and comments, right in your brows...

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URL Parser

Instantly break a URL down into its protocol, host, path, query parameters, and fragment,...

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Everyday Checks for Any Website

When a site feels broken, the first questions are simple: is it up, what does the server return, and where does it redirect? The Website Status Checker answers the first, the HTTP Status Checker shows the exact status code, and the Redirect Checker follows every hop so you can spot chains and loops. The HTTP Headers Checker lists everything the server sends back.

Crawling and Site Health

Search engines start with two files: check them with the Robots.txt Checker and the Sitemap Checker. After a redesign, the Broken Link Checker finds dead links on a page, and the HTML Validator and CSS Validator catch markup errors.

Developer Utilities

This category also holds the small tools you reach for while building: the URL Encoder / Decoder and URL Parser, the Base64 Encoder / Decoder, the Unix Timestamp Converter and the HTML Minifier. They run in your browser, so pasted data stays on your device. For JSON, use the JSON Formatter and JSON Validator in API & Developer Tools.