Webmaster toolkit
Domain lookups, website checks and everyday developer tools.
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24 TOOLS / EVERYDAY ESSENTIALSDomains & DNS
WHOIS / RDAP lookup
Look up a domain’s registrar, registration dates, status and nameservers.
DNS lookup
Inspect A, AAAA, CNAME, MX, TXT and other records using public resolvers.
SSL certificate checker
Check certificate expiry, issuer, covered hostnames and chain validation.
Bulk WHOIS lookup
Look up public RDAP records for up to 10 domains per run.
robots.txt generator
Generate a downloadable robots.txt with crawler, path and sitemap rules.
Subdomain lookup
Find subdomain names observed in public certificate transparency records.
CDN detection
Inspect DNS and public response headers for possible CDN providers.
Network & website checks
HTTP redirect checker
Follow status codes, destinations and response times across a redirect chain.
My IP / IP lookup
See your public IP, or look up the registered network for an IP address.
Bulk IP lookup
Look up registered networks, names and countries for public IPs.
Bulk HTTP checker
Check status codes, redirects and response times for multiple public URLs.
Multi-region HTTP test
Measure HTTP responses from available probes in Asia, Europe and North America.
Webpage source viewer
Read public HTML source as text without executing its scripts.
Multi-region ping
Inspect latency, packet loss and raw results from several regions.
Traceroute
Trace network hops and responses to a host from multiple regions.
Developer & text tools
JSON formatter
Validate, format and minify JSON while preserving number literals.
Encoding converter
Encode and decode URLs, Base64, Unicode escapes and HTML entities.
Unix timestamp converter
Convert seconds, milliseconds and dates with explicit UTC and local time.
Code formatter & minifier
Format JavaScript, CSS and HTML, or minify JavaScript locally.
Custom word checker
Check text against an editable word list and inspect matches and positions.
Security & more tools
AES encryption & decryption
Encrypt and decrypt text locally with password-based AES-GCM.
Random password generator
Generate passwords with cryptographic randomness and chosen character sets.
2FA code generator
Open the code generator on 2fa.global.
More tools
Discover more useful tools on chuhaiheji.com.