Cyber-Guard Tools
Free tools for DNS, IP & Security
A collection of free, fast online tools from the Cyber-Guard team. The site keeps growing, tool by tool.
Network & IP
Network & IP
Tools for IP addresses, subnet calculations, and network information.
What Is My IP AddressLookup your own public IP addressIP Location LookupSee the realtime location of an IPIP WHOIS LookupCheck who owns an IP addressIP Subnet CalculatorCalculate IP subnetsIP to DecimalGet a decimal of an entered IP addressIPv4 to IPv6Convert an IPv4 address to IPv6IPv6 to IPv4Convert an IPv6 address to IPv4IPv6 CompressCompress a long IPv6 addressIPv6 ExpandExpand a short IPv6 addressIPv6 CIDR to RangeConvert a given IPv6 CIDR to rangeIPv6 Range to CIDRConvert an IPv6 range to CIDRMAC Address GeneratorGenerate a random MAC addressMAC Address LookupFind the hardware vendor of a MAC addressASN WHOIS LookupLook up who operates an Autonomous SystemPort CheckerCheck if a port on your connection is openIP Blacklist CheckerCheck an IP against major public DNS blacklistsEmail Header AnalyzerTrace an email's delivery path and auth results
DNS & Domain
DNS & Domain
Live DNS lookups powered by DNS-over-HTTPS.
DNS CheckerCheck DNS propagation across major public resolversDNS Lookup (all records)See all DNS records of a domainNS LookupSee NS records of a domainMX LookupSee mail records of a domainCNAME LookupSee CNAME records of a domainSPF Record CheckerLookup and validate the SPF record of a domainDMARC CheckerDMARC lookup and validationDNSKEY / DS LookupLookup DNSKEY and DS recordsDomain to IP LookupFind the IP address of a domain
Security
Security
Tools for passwords and format validation.
Random Password GeneratorGenerate secure random passwordsPassword Strength CheckerCheck the strength of a passwordCredit Card Checker (Luhn)Check if a card number is validSteganography ToolHide or reveal a secret message inside an imageMD5 & Base64 GeneratorCreate MD5 and Base64 hashesHash GeneratorHash text with MD5, SHA-1, SHA-256, SHA-384, or SHA-512SSL Certificate CheckerCheck a website's TLS certificateJWT DecoderDecode a JSON Web Token's header and payloadFile Hash CheckerVerify a file's checksum against an expected hashPassword Breach CheckerCheck if a password has appeared in known breachesSecurity Headers CheckerCheck a website's HTTP security headersCVE LookupLook up a CVE's description, CVSS score, and referencesClickjacking CheckerCheck if a site can be embedded in an iframeOpen Redirect CheckerCheck a URL's parameters for open redirect issuesSubdomain FinderFind subdomains via public Certificate Transparency logsTyposquatting Domain CheckerFind registered misspellings of your domainDNS Zone Transfer (AXFR) TestCheck if a domain's nameservers leak the full zoneWordlist GeneratorBuild a password/username wordlist for authorized auditsCommand/Payload EncoderEncode a command as Base64, hex, URL, or PowerShell format
Converters & Generators
Converters & Generators
Text and encoding tools that run entirely in your browser, no server involved.
Binary ↔ Text TranslatorTranslate binary to text and backROT13 Encoder/DecoderROT13 encode or decode textMorse Code TranslatorTranslate text to Morse codeWord CounterCount words and characters in textLorem Ipsum GeneratorGenerate Lorem Ipsum placeholder textSmall Text GeneratorMake smaller font textInvisible Character GeneratorGenerate an invisible text characterRunic TranslatorTranslate text into runesRGB to ColortoneConvert RGB to HEX, CMYK, and HSVHEX to ColortoneConvert HEX to RGB, CMYK, and HSVCMYK to ColortoneConvert CMYK to HEX, RGB, and HSVHSV to ColortoneConvert HSV to HEX, RGB, and CMYKQR Code GeneratorTurn text or a URL into a QR codeCase ConverterConvert text between UPPER, lower, camelCase, and more
Developer Tools
Developer Tools
Everyday tools for developers and webmasters.
JSON Viewer, Beautifier & MinifierFormat, validate and minify JSONRobots.txt GeneratorGenerate a robots.txt file instantlyHTACCESS Redirect GeneratorGenerate an .htaccess redirect ruleURL Rewrite GeneratorGenerate a URL rewrite ruleMulti URL OpenerOpen multiple URLs in new tabsHTTP Headers CheckFetch a URL and inspect its response headersTimestamp ConverterConvert between Unix timestamps and datesEmail ValidatorCheck an email's syntax and mail serverCron Expression ExplainerExplain what a cron expression means in plain EnglishRegex TesterTest a regular expression and see matches highlightedUUID GeneratorGenerate random UUID v4 identifiersText Diff CheckerCompare two texts and see what changed
Other Tools
Other Tools
Miscellaneous browser-based tools that don't fit anywhere else.
PDF Page & Text ToolkitReorder pages, delete pages, and stamp text onto a PDFPhoto Blur BrushPaint a blur over just the parts of a photo you chooseEXIF & Metadata Viewer / RemoverSee every hidden metadata field in a photo, then erase it or fake itVideo & Audio TranscriptUpload a video or audio file and get a text transcript, on-device