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Launch checks, fast.

DNS, SSL, HTTP, and launch checks in a compact mobile workspace.

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Recent checks

Recent checks will appear here after you run a tool.
Favorites

Pinned tools

Tap the star beside a tool to pin it here.
Mobile app

Settings & install

Install on iPhone

Open this site in Safari, tap Share, then choose Add to Home Screen. It launches like a standalone app without the App Store.

Theme

Use the palette button in the top bar to switch light, dark, blue, terminal, or purple mode.

👤 Member Login

DNS Record Lookup

Find the currently published DNS records for one hostname, then filter, copy, export, save, or share the result.

Enter a hostname such as example.com or _dmarc.example.com.
Ready for a DNS lookupEnter a hostname and record type to see its published values and resolver details.

DNS Propagation Checker

Check one DNS record across authoritative and public resolvers. Add expected values when you want a clear match-versus-lagging comparison.

Add one or more values to label matching resolvers and identify lagging answers. Separate multiple values with commas, pipes, semicolons, or new lines.
Authoritative + recursive resolver sampling. Use Global/Launch when a cutover needs more confidence than a quick spot check.
Controls how each resolver's complete RRset is evaluated.
Auto-refresh is off. No completed refresh yet. Choose an interval to monitor this one record without building a batch.

Reverse IP Lookup

Provider: ViewDNS

Uses passive DNS / provider intelligence to show domains observed on an IP address. Results are not authoritative DNS data.

Use this when you want a provider-backed passive DNS view. This is not a live DNS query and it should not be treated as complete or authoritative.

Hosting Provider Lookup

Evidence-based Confidence rated

Estimate the DNS provider, CDN/WAF/edge layer, likely origin host, and mail provider from DNS, HTTP, TLS, PTR, and ASN evidence.

This tool intentionally says “likely” because CDN, WAF, and reverse-proxy layers can hide the real origin host.

WHOIS Domain Lookup

Pull registry WHOIS data with a cleaner registrar/date/status summary first, then raw output when you need the messy details.

DNS Tools checks authoritative RDAP registration data and retains legacy WHOIS as a separately labeled compatibility source.

TLS & HTTPS Diagnostics

Check certificate trust, hostname coverage, resolved IPv4/IPv6 endpoints, redirects, and HSTS evidence in one browser-focused review.

Pins the TLS connection to one public endpoint while preserving the hostname for SNI and certificate validation.
OptionsOptional
Compare an apex, www, or alternate hostname against the primary endpoint.

301 Redirect Testing

Redirect Import Tester

Upload one or more 301 redirect import spreadsheets, combine them into one validation run, catch loops/conflicts, and export clean files before WordPress or WP Engine import.

Fixed-file exports
Ready: Upload redirect lists to catch import blockers before they hit WordPress or WP Engine.

HTTP Header Inspection

Repeatable header diagnostics with saved profiles, cache interpretation, CORS checks, and baseline drift comparison.

No profile — inspect headers without profile validation.
CORS / Preflight Diagnostics
Profiles and baselines use MySQL when available. Built-in profiles still work without saved custom profile storage.

HTTP Status Check

Run one-off checks or reusable launch smoke-test route sets with assertions and baseline drift history.

Expected Behavior and Route Set
One route per line. Format: URL/path | expected status | expected final URL | redirect count | title contains | body contains | body not contains | canonical URL

Port Scanner

TCP reachability checks with presets, service guesses, latency, and safer next steps.

Custom ports are added to the selected preset. Use commas, spaces, or ranges like 8000-8010.
Advanced Scan Options
Use this for authorized troubleshooting and firewall validation. Keep scans small and intentional.

Launch Readiness

Page Resource Audit

Scan one page for broken images, missing CSS/JS, failed resources, mixed content, redirects, slow assets, and staging/off-domain references before launch.

Advanced audit options
One pattern per line or comma-separated. Supports simple wildcards.
Used only for this scan and not included in exports/shares.

Domain Snapshot

Capture a broad domain-state snapshot with DNS, mail/auth records, SSL, registrar details, and edge-provider clues.

Email Deliverability Tester

Check the DNS and transport-policy foundation behind a sending domain without receiving or retaining an email.

DNS-based No inbox guarantee

Inbound Message Spam Test

Send a real message to a one-time private address and review authentication, sender DNS identity, delivery-path, and safe content evidence.

Member-onlyOne message
Sign in to generate a private test address and keep results in your account. Open member login

📚 My Snapshots

Review saved shares and snapshots from the frontend app without jumping into the member portal.

Sign in to view your saved snapshots, reports, and shared outputs here. Open member login
Loading your saved snapshots…

Site Monitor

Check public website responses from the DNS Tools server. This is one location; a failed or blocked probe does not prove every visitor sees an outage.

Open Site Monitor to load your monitors.

The scheduled runner must be configured by your administrator. Two consecutive checks confirm incidents or recovery from this location, not a worldwide outage. In-app alerts are on; email is off until you opt in. Maintenance suppresses alerts, not checks.

Domain Watch

Monitor a registered domain’s renewal date and registration status. This does not monitor DNS records or confirm that auto-renew is enabled.

Sign in to monitor domain registrations. Open member login
Open Domain Watch to load your portfolio.

My DNS Watches

See current DNS answers at a glance, resolve items that need attention, and run checks without leaving the workspace.

Watch overview
Search, filter, or run the watches shown below.
Sign in and create a DNS watch to start tracking changes in the background.
Validation Bundle Builder
Validation Bundles
Create a bundle to group DNS, SSL, header, and status checks for one launch.
Launch Sessions
Launch Sessions tie baselines, validation bundles, scheduled snapshots, and a timeline together so one domain launch can be monitored from one place.
Launch Sessions
Create a launch session to coordinate scheduled snapshots, baselines, validation bundles, and timeline events.

Client DNS Handoff

Create and manage separate DNS change packages for each client or project.

Client handoff packages
Loading handoff packages…

📝 Reports

Build polished read-only outputs from saved launch workflows and the current visible result from any supported tool.

Use the new Report action on result panels for quick executive or technical outputs. This workspace handles saved launch sessions, validation bundles, and domain snapshot comparisons.
Saved workflow export

Validation Bundle

Generate a clean read-only report from one existing validation bundle.

Saved workflow export

Launch Session

Preserve the current launch-session state, timeline, and linked bundle context in one printable output.

Comparison export

Domain Snapshot Comparison

Choose two stored snapshots for the same domain and turn the comparison into a client-friendly read-only report.

Generated Reports

Ready for output

Generate a read-only report from a saved workflow or supported result panel.

When a report is ready, this area will show the preserved title, summary metrics, share state, and quick export actions.

DNS Zone File Compare

Paste or upload a DNS zone export and compare it against live DNS before a nameserver migration.

Choose which records and risks should be emphasized. Comparison rules are controlled separately below.
Text zone exports only. The file is read in this browser tab and sent as text for the comparison.

DNS Migration Readiness Workspace

Cutover planning Human review required

Combine live DNS, zone-file comparison, provider intelligence, proposed records, and watcher targets into one migration readiness review.

Used in the copy-ready client summary only.
Zone-file style lines work best. These become suggested post-cutover watcher targets.
This workspace does not change DNS. It creates a readiness checklist, migration summary, and watcher target suggestions to support the engineer’s final review.

Batch DNS Operations

Look up a simple list with one record type, or paste complete DNS record sets with a different type on each row.

One hostname per line uses the default type. You can also paste Type/Name/Value blocks, copied tables, pipe, tab, CSV, or zone-file rows. Values are accepted for easy pasting; Bulk DNS always returns the current live answer.
Expands relative names such as www, @, and _dmarc.
Build a mixed-type batch without pasting. Each typed lookup is added to the same editable list above.

Batch DNS Propagation Checker

Check multiple DNS records across selected public resolvers, compare expected values, and monitor propagation changes without overlapping requests.

Batch setupAdd records and choose resolver coverage. Edit setupHide setup

Records to check

Each row can use a different hostname, record type, and expected value.
0 records ready Maximum 50 records per batch
Paste a record list
Resolver selection
Filter 1

Secure Password Generator

Secure Note

CDN Detector

Detects edge providers from live response headers first, then falls back to DNS and certificate hints when needed.

What's My IP Address

216.73.217.23
Your Current IP Address

Automatically detected from your connection • Click IP to copy

Registrar Lookup

Summarize registrar ownership clues, important dates, status locks, WHOIS path, and current nameservers without digging through raw WHOIS first.

CSR Decoder

Batch Status Check

One HTTP or HTTPS URL per line. A hostname without a scheme is checked with HTTPS first. Duplicate URLs are allowed but will run more than once.