DNS & Domain Tools

DNS lookup

Online tool for advanced DNS lookups (nslookup / DIG-style). By default, it performs recursive queries against authoritative name servers - but custom DNS resolvers are supported too. Includes secondary records for a complete overview and provides a full technical log for debugging and insight.

DNS propagation check

Check how DNS records are propagated throughout the world. It will start by examining the authoritative name servers and compare the records with the results from over 20 DNS servers worldwide.
WHOIS / RDAP lookup
Perform WHOIS and/or RDAP lookups on domains, IP addresses, and ASNs. Will output all available technical info, contact info, etc.
Reverse DNS
Perform rDNS lookups on IPv4 or IPv6 addresses. Check PTR records to see the hostname behind any IP.

Network & Routing Tools

Port scan + probeing
Scan any IP for any open ports. Includes probing functionality on DNS, SMTP, POP3, IMAP and HTTP protocols if open.
CIDR calculator
IP to CIDR calculation tool with subnet info. The reverse, CIDR ranges to IP addresses, is also possible. Last but not least, it includes a tool for refactoring groups of IPs, domain names, and/or other CIDR ranges.

ASN database lookup

Search the detailed ASN/BGP database for insights into peers, announced prefixes, upstream/downstream relationships, and IX memberships. Search by ASN, IP, or CIDR block. Includes organizational metadata like name, description, network type, logo, website, and social media links.
GeoIP location
GeoIP lookup tool. Supports lookup of ip's in bulk - and lookups based on domainnames. Includes ASN/ISP data. Based upon the MaxMind database.
Ping / traceroute
Ping tool for testing connectivity to a host, measuring response times, jitter, and packet loss. Global ping works like regular ping - but from multiple sources worldwide, simultaneously. Traceroute maps the full path data takes, showing each hop’s response time, ASN, and geo-info to diagnose network issues.

Connection & service tester (TCP/UDP)
beta

This tool answers a simple question: Is the service actually reachable? It’s an advanced, multi-protocol UP/DOWN checker - far beyond a basic port test. Supports dozens of test flows, including web, APIs, mail, databases, remote access, and more. It connects, handshakes, waits for a real response, and verifies that the service behaves as a healthy client would expect.

Web & Developer Tools

HTTP/S request tool

Test HTTP/HTTPS requests with full control of headers, body, and method. View raw request/response. Great for debugging, monitoring, and setup checks.
TLS/SSL certificate check
Check any server’s SSL/TLS certificate for validity, expiration, full chain of trust, and protocol support (TLS 1.0–1.3, SSL2/3). Includes PEM details, root store trust (Microsoft, Apple, Android). Supports check of HTTPS, SMTP, IMAP, and POP3.
URL encode/decode
URL encoding/decoding tool to convert special characters to percent-encoded format and back. Great for debugging, query strings, API testing, and safe web development. Based on RFC 3986.
HTML encode/decode
Online tool for HTMLencode and/or HTMLdecode of any string.
BASE64 encode/decode
Online tool for BASE64 encoding af binary-to-text, and BASE64 decoding for text-to-binary.
Hash calculator
Online tool for string/file hash encoding using the CRC32, CRC64, MD5, Blake2b, Blake3, Whirlpool, RipeMD, SHA-1, SHA256, SHA384, SHA512, SHA3-224, SHA3-256, SHA3-384 and SHA3-512 algorithms.
Compression util
Online tool for compression and decompression of text, files, and binary data. Supports Deflate, Gzip, Brotli, LZMA, and Snappy algorithms. Includes a benchmark comparison feature.
What is my IPv4 and IPv6?
Check your IPv4 and IPv6 address and analyze your network setup. Includes ISP/ASN lookup, DNS resolver detection, browser and device information, and connectivity diagnostics in a shareable report.

Email & Mail Server Tools

E-mail DNSBL blacklist check
Check IP or domain against the most common e-mail blacklists.
Reverse DNS
Perform rDNS lookups on IPv4 or IPv6 addresses. Check PTR records to see the hostname behind any IP.

SPF multitool
beta

SPF tool for check, validation and troubleshooting SPF records - will parse records, including secondary records and output list of mentioned IPs and ranges. Has a setup guide for SPF record generation as well.
DKIM Key Generator
beta
Tool for creation of new strong 4096-bit DKIM keys. The tool will guide you through the process.
DMARC check / generate
beta
Check and/or create DMARC records.
Mail header analyzer
beta
Analyzer mail headers - parse the mail headers for better readability, and analyze the content. Details basics, meta, security and authentication and received path.
DMARC Report Analyzer
beta
Tool for parsing and analyzing DMARC forensic reports returned by various mail providers. You can either upload the reports manually, or let the tool automatically parse all reports found in your mailbox.

Utility Tools

Color contrast checker
Online tool for checking the contrast/readability of two colors - and get hints for optimizing the contrast.

Color picker

Pick any color - and see info on related colors, contrast colors and different shades.
Password generator
Generate strong passwords up to 32 characters. Customize length, casing, numbers, and symbols. Copy or read aloud with phonetic NATO codes.
Lorem ipsum generator
Generate lorem ipsum with custom readability levels. Create dummy text that matches your content’s complexity. Output as plain text or HTML.
World map, day/night + local time
Beautiful day/night map of the world, with markup of all major cities including local date and time.
QR code generator
Turn any URL into a scannable QR code.

What is iamroot.tech?

iamroot.tech is a growing toolbox of advanced, no-nonsense online tools for sysadmins, developers, and anyone who prefers clarity over clutter. Whether you're debugging DNS, looking up ASNs, or inspecting HTTP headers, each tool is built to be fast, focused, and free of noise.

The project started as a personal need - I’m a full-stack developer and systems admin, and I was tired of bloated tools full of ads, vague results, or limited features. So I started building my own. Everything on iamroot.tech is developed and maintained by me, with clean interfaces, detailed outputs, and just the options that matter.

All tools are completely free to use, with no registration or signup required. The only exception is the monitoring platform, where an account is needed to save and manage your monitors - but that is free too.

These tools have been extremely useful to me, and I hope they will serve you as well.

About the project » Best regards
Flemming

Monitoring tools

Monitor infrastructure. Not invoices. The monitoring system allows you to - free of charge - monitor servers, websites, DNS, SSL/TLS certificates, mail and much more from a single dashboard.

Key features:
⏱️ Checks every 10 seconds
🔔 Instant alerts
📈 Detailed performance tracking
🖥️ Unlimited monitors
🔑 Unlimited API keys
💸 Free of charge


Quick-add monitor » Read more »

Feedback

These tools are still in active development. If you have any kind of feedback, please let me know. Send me an e-mail on iamrootdottech(a)gmail.com.

Changelog

2026-11-07 - Monitoring system alerting overhaul - In preparation for new alerting methods, the entire alerting system has been rebuilt. This also allows multiple users within the same team to subscribe to alerts from the same monitors. New alerting methods (Discord, Slack, Microsoft Teams and SMS) will be added shortly.

2026-11-07 - OAuth remake - adding Microsoft, Slack, Discord and GitHub - The OAuth functionality has been rebuilt from the ground up, and Microsoft, Slack, Discord and GitHub integrations have been added for both newsletter subscriptions and monitoring system signup and login.

New features inbound 🚀
Within a couple of months, I'll launch a several new awesome features and tools. Signup for the newsletter to stay updated, and get early access as a beta tester.

Signup using Google  Microsoft  Slack  Discord  GitHub  or use this form.