Useful tools.
Ready when you are.
Check DNS and email records, generate keys, convert data and calculate network ranges. No account needed.
DNS Lookup
Query public DNS records and inspect their time to live.
Open tool →DNSAll DNS Records
Look up eight common record types in one request.
Open tool →DNSMX Lookup
Inspect the MX records published for a domain.
Open tool →DNSTXT Lookup
Inspect the TXT records published for a domain.
Open tool →DNSCNAME Lookup
Inspect the CNAME records published for a domain.
Open tool →DNSSOA Lookup
Inspect the SOA records published for a domain.
Open tool →DNSNS Lookup
Inspect the NS records published for a domain.
Open tool →DNSCAA Lookup
Inspect the CAA records published for a domain.
Open tool →DNSPTR Lookup
Resolve the reverse DNS name of an IPv4 address.
Open tool →DNSDNSSEC Check
Check whether Google Public DNS authenticates the DNS response.
Open tool →DNSCAA Generator
Create a certificate authority authorization record.
Open tool →SSL & SecurityPassword Generator
Generate a password with cryptographically secure randomness.
Open tool →SSL & SecurityHash Generator
Compute a SHA-256, SHA-384 or SHA-512 digest locally.
Open tool →SSL & SecurityCertificate Fingerprint
Calculate the SHA-256 fingerprint of a PEM certificate.
Open tool →SSL & SecurityPEM Formatter
Validate the Base64 body and format a PEM block.
Open tool →EmailSPF Lookup
Find the SPF policy published in DNS.
Open tool →EmailDKIM Lookup
Find the public DKIM record for your domain and selector.
Open tool →EmailDMARC Lookup
Inspect your domain’s DMARC policy.
Open tool →EmailBIMI Lookup
Find a BIMI record at the selected DNS selector.
Open tool →EmailEmail DNS Health
Check for MX, SPF and DMARC records without sending email.
Open tool →EmailSPF Generator
Create a policy for the mail providers you authorize.
Open tool →EmailDMARC Generator
Create a DMARC record with reporting and alignment options.
Open tool →SSH & KeysSSH Key Generator
Generate an RSA OpenSSH public key and PKCS#8 private key in your browser.
Open tool →SSH & KeysSSH Key Fingerprint
Compute the SHA-256 fingerprint of an OpenSSH public key.
Open tool →SSH & KeysSSH Config Builder
Build an SSH host configuration entry.
Open tool →WebURL Inspector
Split a URL into its host, path, query and fragment.
Open tool →WebRobots.txt Generator
Create a robots.txt file with a crawler rule and sitemap.
Open tool →WebOpen Graph Generator
Generate social sharing meta tags for a webpage.
Open tool →NetworkSubnet Calculator
Calculate an IPv4 network, broadcast, mask and usable address range.
Open tool →NetworkIPv4 Converter
Convert an IPv4 address to binary, hexadecimal and decimal.
Open tool →NetworkIPv6 Expander
Expand a compressed IPv6 address into eight groups.
Open tool →GeneratorsUUID Generator
Generate random version 4 UUIDs.
Open tool →GeneratorsAPI Key Generator
Generate a random hexadecimal API key.
Open tool →GeneratorsRandom String Generator
Generate random letters and numbers.
Open tool →GeneratorsMAC Address Generator
Generate locally administered unicast MAC addresses.
Open tool →GeneratorsCrontab Generator
Build a five-field cron expression for a daily or hourly schedule.
Open tool →ConvertersBase64 Encoder / Decoder
Encode or decode Unicode text as Base64.
Open tool →ConvertersURL Encoder / Decoder
Encode or decode a URL component.
Open tool →ConvertersJSON to CSV
Convert an array of flat JSON objects into CSV.
Open tool →ConvertersCSV to JSON
Convert CSV with a header row into JSON objects.
Open tool →ConvertersEpoch Converter
Convert Unix seconds or milliseconds into a UTC date and back.
Open tool →UtilitiesJSON Formatter & Validator
Validate, pretty-print or minify JSON.
Open tool →UtilitiesJWT Decoder
Decode JWT header and payload. This does not verify its signature.
Open tool →UtilitiesText Statistics
Count characters, words, lines and UTF-8 bytes.
Open tool →UtilitiesCase Converter
Convert text to upper, lower, title or sentence case.
Open tool →UtilitiesDate Difference
Calculate elapsed time between two dates in UTC.
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