Free online tools for websites, domains and developers
Check whether a site is down, look up a domain's age or DNS, test an SSL certificate, find your IP, convert JSON and audit a page's SEO. Free, no sign-up, built by the HostKarle support team.
Is it down? India
Website down checker
Check whether any website is down for everyone or just you, from our server.
GST portal status
Is the GST website working right now? Checked every 5 minutes.
Income Tax portal status
Live check of the e-filing portal, with user reports.
UPI server status
Is UPI down today? Bank and app checks plus user reports.
SBI server status
SBI online banking status, last 24 hours of checks.
IRCTC status
Is the IRCTC website down? Live check and reports.
Domain, DNS & SSL
WHOIS lookup
Registrar, registration and expiry dates and nameservers, read from the registry.
Domain age checker
How old a domain is, when it expires, and who hosts it. Bulk mode for 20 domains.
Bulk domain search
Check up to 20 domain ideas at once, with prices.
Hosting checker
Find out which company hosts any website.
DNS lookup
A, AAAA, CNAME, MX, NS, TXT, SOA and CAA records, compared across resolvers.
SSL checker
Is a site's certificate valid, trusted and matching? Days left, chain, TLS version.
SSL certificate decoder
Paste a certificate or CSR and read every field in plain English.
IP & network
What is my IP
Your public IP address, ISP and location.
IP lookup
Owner, ASN, location and reverse DNS for any IP or domain. Bulk mode for 100 IPs.
ASN lookup
Network name, country and every prefix of an autonomous system.
MAC address lookup
Find the vendor of any MAC address and convert between formats.
MAC to IPv6 converter
MAC to EUI-64 and IPv6 link-local address, and back.
Developer tools
JSON formatter & validator
Beautify, minify and validate JSON with the exact error line.
XML to JSON converter
Convert XML to JSON in your browser, attributes and arrays included.
JSON to XML converter
Turn JSON into well-formed XML.
JSON path finder
Click any value to get its path; test JSONPath expressions.
JSON size calculator
Bytes of your JSON, minified vs pretty, size per key.
HTML compare
Diff two blocks of HTML or text, line and word level.
SEO tools
Keyword density checker
Word count and 1, 2 and 3-word phrase density for text or a URL.
Sitemap checker
Find and validate a site's XML sitemap and test the URLs in it.
Broken link checker
Every link on a page with its status code; broken ones highlighted.
Canonical tag checker
Canonical tags, Link headers, redirects and www/https consistency.
OG tags generator
Generate Open Graph and Twitter tags with a live preview, or check a URL.
Favicon checker
All declared icons, apple-touch icons and the web manifest.
More status pages: all 20 Indian services we check.
Frequently asked questions
Missing a tool you need? Message us on WhatsApp at +91 94343 44325.
Are these tools free?
Yes. Every tool on this page is free with no sign-up. Lookups that hit our server are limited to about 40 per visitor in 10 minutes to stop automated scraping.
Do you store what I paste?
No. The JSON, XML and HTML tools run entirely in your browser, so the data never reaches our server. Lookup tools (WHOIS, DNS, SSL, IP) keep short-lived cached answers about public domains and IPs, never personal data you type.
Who makes these tools?
HostKarle, an Indian web hosting company. We built them for our own customers and support team, and keep them open for everyone.
Can I host my own website with HostKarle?
Yes. Shared hosting with free SSL and business email starts at ₹99 a month on a yearly plan, payable by UPI or card with a GST invoice. See hosting plans.
Need a home for your own website?
Shared hosting with free SSL and business email from ₹99 a month on a yearly plan. Pay by UPI or card, GST invoice included.