Practical utilities for network engineers, IT admins, and MSPs — no sign-up required.
Calculate network address, broadcast address, first and last usable hosts, subnet mask, wildcard mask, and binary breakdown — instantly from any CIDR range.
Open CalculatorCompress and expand IPv6 addresses, find the network range and address count, classify the address scope, and derive EUI-64 interface identifiers from a MAC address.
Open CalculatorComplete IPv4 CIDR reference — subnet masks, wildcard masks, usable hosts, and binary breakdown from /0 to /32.
View Cheat SheetConvert subnet masks between dotted decimal, CIDR prefix, binary, and wildcard formats — auto-detects your input.
Open ConverterList every usable IP address in a subnet. Enter a CIDR range to get a paginated table of all host IPs.
Open FinderLook up the vendor behind any MAC address using the IEEE OUI registry. Identifies network interface manufacturers for any device.
Open LookupLook up TCP and UDP port numbers from the IANA registry. Search by port number or service name, filter by category — covers ports 0-10000.
View ReferenceSearchable reference of all HTTP status codes with descriptions, categories, and common usage examples.
View ReferenceWork out how long a file transfer will take at any bandwidth, or the speed you need to hit a deadline. Handles Mbps vs MB/s and decimal vs binary units correctly.
Open CalculatorPaste a subnet plan and find every overlapping, duplicate and contained CIDR range. Handles IPv4 and IPv6 in the same list and flags the exact lines in conflict.
Check OverlapsFormat, validate, and minify JSON instantly. Spot errors with line-by-line highlighting and explore data with an interactive tree view.
Open FormatterTest regular expressions against any string in real time. Highlights all matches, shows capture groups, and previews find-and-replace output.
Open TesterCompare two blocks of text or code with unified and side-by-side views. Line numbers, character-level highlighting, and one-click copy.
Open Diff ViewerConvert YAML to formatted JSON instantly. Supports nested objects, arrays, and multi-level indentation. Clear error messages for invalid YAML.
Open ConverterConvert JSON to clean, readable YAML. Ideal for Kubernetes configs, Ansible playbooks, Docker Compose, and any tool that prefers YAML over JSON.
Open ConverterConvert CSV files to formatted JSON instantly. Supports RFC 4180 quoted fields, multiline cells, and graceful error handling. Client-side processing.
Open ConverterConvert JSON arrays to RFC 4180 CSV. Supports nested object flattening, arrays, booleans, and nulls. Client-side processing.
Open ConverterTest password entropy, estimate crack time, and check Microsoft 365 compliance in real time — nothing leaves your browser.
Open CheckerGenerate strong random passwords with crypto-grade randomness. Choose your length and character sets, exclude ambiguous characters, and generate in bulk.
Open GeneratorDecode any JSON Web Token to inspect its header, payload claims, and expiry status. Shows what each registered claim means and warns about unsigned tokens.
Open DecoderDecode any SSL/TLS certificate in PEM format. View subject, issuer, validity, SANs, key usage, and fingerprint instantly.
Open DecoderDecode NTFS permission sets and calculate effective permissions when multiple groups or inheritance sources combine. Deny overrides Allow.
Open CalculatorGenerate MD5, SHA-1, and SHA-256 hashes from any text string instantly. All processing happens in your browser.
Generate HashesConvert cron expressions to human-readable descriptions. See the next 10 run times, field breakdowns, and common presets.
Open ParserConvert between Unix timestamps, Windows FILETIME, and human-readable dates. Auto-detects input format — ideal for Active Directory and Event Log troubleshooting.
Open ConverterConvert between octal and symbolic Linux permissions. Build a mode with a clickable rwx grid, decode setuid, setgid and sticky bits, and calculate umask.
Open CalculatorDMC IT Services provides cloud infrastructure design, mobile device management, and secure data destruction for SMBs across London, Cambridge, Hertfordshire, and Bedfordshire.
Talk to an Engineer