Tools & Resources
Free interactive tools we built, plus a hand-picked list of trusted sites we actually reach for — vetted, no fluff, no chatbots.
FixHub tools
Email Setup Finder IMAP / POP / SMTP
Enter an email address or domain and get the correct mail server settings instantly — the Thunderbird-autoconfig way.
Windows Error Code Decoder HRESULT / Win32
Paste a code like 0x80070005 → its Microsoft-documented meaning, a structural breakdown, and a link to the fix.
DNS & Email Checker MX / SPF / DMARC / DKIM
Enter a domain → live MX, SPF, DMARC, DKIM, DNSSEC and nameservers. The "why is my email in spam?" check.
Email Header Analyzer paste headers
Paste raw headers → the delivery path, the delay at each hop, and SPF/DKIM/DMARC results. 100% in your browser.
Network Calculator Suite Subnet / CIDR / MAC
Subnet/CIDR breakdown, IP range finder, CIDR notation converter, and MAC address OUI lookup — all in one place.
JSON / XML Formatter format & validate
Paste JSON or XML to pretty-print, validate, and minify it. Shows syntax errors with line numbers.
Base64 Encoder / Decoder UTF-8 & URL-safe
Encode or decode Base64 strings with UTF-8 support, URL-safe mode, and file-to-Base64 conversion.
Regex Tester real-time matching
Test regular expressions in real time with syntax highlighting, match highlighting, and capture group breakdown.
Password Generator local & secure
Cryptographically secure passwords with live entropy strength — generated in your browser, never sent anywhere.
HTTP Status Code Decoder 403 / 502 / 522
Type any HTTP status code → its official meaning, what it means for visitors, and what to check as the site owner.
Network Port Lookup TCP / UDP
Look up any port number or service — what runs on 445, 3389, 8019 — for firewall rules and netstat output.
World Clock & Time Zone Converter DST-accurate
Convert a time between any two zones and keep a live multi-city clock — daylight-saving handled automatically.
QuickBooks Version Lookup by product code
Enter a QuickBooks product code to identify the exact edition, year, and official Intuit download.
QuickBooks Download Archive verified Intuit links
Direct official installer links for every QuickBooks Desktop version, by edition and year.
Site Search press / or Ctrl+K
Search every guide — or paste an error code to jump straight to the fix.
Trusted sites & references
Each has genuinely useful content or a utility of its own. We'll keep adding to this list.
Microsoft Learn learn.microsoft.com ↗
Microsoft's official documentation for Windows, Microsoft 365, Server, and PowerShell. The authoritative source we cite throughout FixHub.
cmd.ms cmd.ms ↗
Jump straight to any Microsoft cloud admin portal by typing a word (e.g. exchange.cmd.ms, entra.cmd.ms). Built by a Microsoft Entra PM — perfect for when Microsoft moves the portal URLs.
ADMX.help admx.help ↗
Search every Windows and Office Group Policy (ADMX) setting — find the exact policy name, path, and registry key without hunting through gpedit.
SS64 ss64.com ↗
A clean command-line reference for Windows CMD, PowerShell, Bash and more — every command, its switches, and real examples.
Sysinternals learn.microsoft.com/sysinternals ↗
Microsoft's free power tools — Process Explorer, Autoruns, PsExec, TCPView and friends. Indispensable for diagnosing what Windows is actually doing.
BleepingComputer bleepingcomputer.com ↗
Trusted tech and security news, plus careful malware-removal guides and an active help community.
Windows OS Hub woshub.com ↗
Deep, accurate how-tos for Windows, Active Directory, PowerShell and Group Policy, aimed at sysadmins.
MXToolbox mxtoolbox.com ↗
Instant DNS, MX, SPF/DKIM/DMARC and blacklist lookups — the go-to for diagnosing email-delivery and DNS problems.
VirusTotal virustotal.com ↗
Upload a file or paste a URL to scan it against 70+ antivirus engines — a quick second opinion before you run something.
Have I Been Pwned haveibeenpwned.com ↗
Check whether an email address or password has appeared in a known data breach. Run by security researcher Troy Hunt.
ElevenForum elevenforum.com ↗
A huge, well-organized library of Windows 11 (and 10) step-by-step tutorials, plus a helpful community.
PowerShell Gallery powershellgallery.com ↗
Microsoft's official repository for PowerShell modules and scripts — find and Install-Module trusted packages.
Regex101 regex101.com ↗
Build, test and debug regular expressions live, with a plain-English breakdown of every token.
DNS Checker dnschecker.org ↗
Check DNS propagation from servers around the world — confirm a record change has actually gone live everywhere.
Downdetector downdetector.com ↗
See whether a service (Microsoft 365, your bank, an ISP…) is down for everyone or just you.
Ninite ninite.com ↗
Install or update a batch of common Windows apps from one clean installer — no toolbars, no junk.
Spiceworks Community community.spiceworks.com ↗
A long-running Q&A community of IT pros — real-world answers to sysadmin and networking problems.
WizTree diskanalyzer.com ↗
The fastest disk-space analyzer for Windows — it reads the NTFS master file table directly, so it maps an entire drive in seconds.
Everything voidtools.com ↗
Instant filename search across your whole drive (by voidtools) — type a few letters and every matching file appears immediately.
Speedtest speedtest.net ↗
Measure your real download/upload speed and latency (by Ookla) — a quick first check for 'the internet is slow.'
GRC ShieldsUP! grc.com ↗
Steve Gibson's classic port-scan test — see which of your ports are exposed to the internet from the outside.