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Free online tools for IT pros, sysadmins and developers. DNS, SSL, security, networking and more — no login required.

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Security Tools

Password generators, hash tools, JWT decoder and security utilities.

Developer Tools

JSON formatter, Base64, URL encode, regex tester and developer utilities.

DNS & Domain

DNS lookups, WHOIS, SPF, DKIM, DMARC and domain expiry checks.

IP & Network

IP lookup, CIDR calculator, subnet tools, port checker and traceroute.

Web & SSL

HTTP headers, SSL checker, redirect tracer and website status checks.

Email & Deliverability

Email header analysis, SPF/DMARC generators, blacklist checks and SMTP tests.

Time & Generators

Timestamp converter, QR codes, random generators and test data tools.

Scripts

Operational script library split into MSP scripts, Linux scripts, and Windows scripts.

Popular tools

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Password Generator Generate strong, secure random passwords with custom length, symbols, numbers and uppercase options. JSON Formatter & Validator Format, beautify and validate JSON with syntax highlighting and error detection. DNS Lookup Look up DNS records for any domain. Query A, AAAA, MX, TXT, CNAME, NS, SOA and more. MX Lookup Look up mail exchanger (MX) records for any domain to find email servers. SPF Record Checker Look up and analyse the SPF DNS record for any domain to verify email sender policy. Port Checker Check if a specific TCP port is open or closed on any hostname or IP address. Traceroute Tool Trace the network path to any hostname or IP and identify routing hops. SSL Certificate Checker Inspect the SSL/TLS certificate for any domain including issuer, validity and chain. URL Shortener Shorten any URL to a compact link. Set a custom alias, expiry time, or make it single-use. Cloud Scripts Ready-to-run PowerShell scripts for Exchange Online, Microsoft 365, Entra ID and cloud administration.

Security Tools

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Password Generator Generate strong, secure random passwords with custom length, symbols, numbers and uppercas… Passphrase Generator Generate memorable 3-word passphrases that are easy to remember but hard to crack. UUID Generator Generate RFC 4122 compliant UUID v4 unique identifiers instantly. Hash Generator Generate MD5, SHA1, SHA256 and SHA512 hashes from any text string. Bcrypt Hash Generator Generate and verify bcrypt password hashes with configurable cost factor. Password Strength Checker Check the strength of your password and get actionable improvement tips.

Developer Tools

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Base64 Encode / Decode Encode text or data to Base64 format and decode Base64 strings back to plain text. URL Encode / Decode Encode strings for safe use in URLs and decode percent-encoded URL strings. JSON Formatter & Validator Format, beautify and validate JSON with syntax highlighting and error detection. YAML to JSON Converter Convert YAML configuration files to JSON format instantly. JSON to YAML Converter Convert JSON data to YAML format for cleaner configuration files. Regex Tester Test and debug regular expressions with live match highlighting and group capture display.

DNS & Domain

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DNS Lookup Look up DNS records for any domain. Query A, AAAA, MX, TXT, CNAME, NS, SOA and more. MX Lookup Look up mail exchanger (MX) records for any domain to find email servers. TXT Record Lookup Look up TXT DNS records for a domain including SPF, DMARC, and verification tokens. CNAME Lookup Look up CNAME (canonical name) DNS records to find domain aliases. NS Lookup Look up nameserver (NS) records for any domain to find authoritative DNS servers. SOA Record Lookup Look up the Start of Authority (SOA) record for any domain.

IP & Network

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What Is My IP Find your current public IP address, location, ISP and connection details. IP to Decimal Converter Convert IPv4 addresses between dotted-decimal notation and decimal/hex/binary formats. CIDR Calculator Calculate network address, broadcast address, host range and usable IPs from a CIDR block. Subnet Calculator Calculate subnet mask, network address, broadcast address and host count from IP and prefi… IP Range Calculator Calculate the full IP address range for a given subnet or CIDR block. Port Checker Check if a specific TCP port is open or closed on any hostname or IP address.

Web & SSL

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HTTP Headers Checker Inspect HTTP response headers for any URL including security headers and cache settings. Redirect Checker Follow and display the full redirect chain for any URL. SSL Certificate Checker Inspect the SSL/TLS certificate for any domain including issuer, validity and chain. SSL Expiry Checker Check when an SSL certificate expires and how many days remain. Website Status Checker Check if a website is up or down and get the HTTP status code. User Agent Parser Parse any User-Agent string to identify browser, OS, device type and version.

Email & Deliverability

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Email Header Analyzer Paste raw email headers and get a full breakdown of routing, authentication and delays. SPF Record Generator Build a valid SPF TXT record for your domain using a simple guided form. DMARC Record Generator Generate a properly formatted DMARC policy record for your domain. DKIM Helper Understand DKIM setup, generate DKIM key pairs and get guidance for your DNS records. MX Health Summary Run a full email health check — MX, SPF, DMARC, DKIM and blacklist status in one view. SMTP Connectivity Test Test SMTP connectivity and optional AUTH login to a mail server on ports 25, 465, 587 or 2…

Time & Generators

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Timestamp Converter Convert Unix timestamps to human-readable dates and times in any timezone. Epoch Converter Convert between Unix epoch time and readable dates. Get the current epoch timestamp. Timezone Converter Convert times between any two timezones worldwide. QR Code Generator Generate QR codes from any text, URL, or data. Download as PNG. Barcode Generator Generate standard 1D barcodes in Code128, EAN-13, UPC-A and other formats. Random Number Generator Generate random numbers within any range, optionally unique or sorted.

Scripts

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Cloud Scripts Ready-to-run PowerShell scripts for Exchange Online, Microsoft 365, Entra ID and cloud adm… Linux Scripts Simple Linux shell scripts for updates, log cleanup, disk checks and service troubleshooti… Windows Scripts Simple Windows PowerShell scripts for common admin tasks, health checks and quick diagnost… Submit a Script Submit Linux, Windows, or Cloud scripts for moderation and community publication.