Email route
Useful by design · free to use
Free business technology tools.
Practical checks and generators for passwords, email, websites and everyday IT decisions, with clear evidence and next steps you can act on. Forty tools are available now, so start with the problem you need to solve today.
- Clear inputs
- Useful evidence
- Practical next steps
Not sure where to begin?
Start with the problem in front of you.
Each route links a few tools in a sensible order. You can stop as soon as you have the answer you need.
Website route
Plan or improve a website
Resilience route
Prepare for disruption
Ownership route
Take control from a supplier
Cloud-team route
Review identity and access
The public toolbox
Find the right tool quickly.
Search by the question you are trying to answer, or narrow the library to one practical category.
40tools shown
Available
Security
Password & Passphrase Generator
Create strong, private credentials without sending them to a server.
Available
Security
QR Code Generator
Create clear QR codes for website links, Wi-Fi, contact cards and text, with SVG and PNG downloads.
Available
Email Sending Readiness Check
Understand SPF, DKIM, DMARC and sending risks in plain English.
Available
SPF Checker & Explainer
Expand nested SPF records, show potential DNS lookup pressure and explain risky policy choices.
Available
SPF Record Builder
Build one cautious SPF draft from an inventoried set of legitimate email senders.
Available
DMARC Checker & Policy Explainer
Discover direct or inherited DMARC policy, explain alignment and inspect reporting destinations.
Available
DMARC Record Builder
Plan a staged DMARC policy with reporting, evidence gates, test mode and rollback checks.
Available
DKIM Inspector & Key Checker
Check a known DKIM selector or run bounded discovery, then inspect public-key strength and restrictions.
Available
DMARC Aggregate Report Reader
Read XML or GZIP aggregate reports privately and compare sources, alignment paths and receiver actions.
Available
Email Header Analyzer
Read authentication results, DKIM selectors and delivery hops without uploading a message.
Available
Email Signature Builder
Create a clean, accessible signature with a live preview and copy-ready email HTML.
Available
Web
Website Health Check
Check HTTPS, redirects, certificates, headers and essential website signals.
Available
Web
Page Speed Snapshot
Compare mobile and desktop Lighthouse lab results, available Core Web Vitals field data and practical priorities.
Available
Web
Security Headers Check
Inspect browser protection headers, see the exact evidence and understand which settings need context before they change.
Available
Web
Accessibility First Look
Find observable HTML accessibility issues, review the evidence and work through the essential checks that need a person.
Available
Web
SEO Essentials Check
Review search metadata, indexing directives, canonical signals, headings, structured data and social previews without a ranking score.
Available
Web
Broken Link Finder
Sample a small set of website pages and separate clear 404s from redirects, access restrictions and links that could not be verified.
Available
Web
Robots.txt Tester & Builder
Test whether a crawler may request an exact URL, see the winning rule and build a clean starter robots.txt file.
Available
Web
Sitemap Checker & Builder
Validate a sitemap or sitemap index, sample listed pages for response and canonical consistency, and build a small XML file.
Available
Web
E-commerce Readiness Check
Review a public shop page's checkout routes, policies, contact details, mobile foundations and visible buying information.
Available
Planning
Shopify vs WooCommerce Fit Finder
Compare operating model, team, content, integrations and buying requirements with a transparent, explainable fit result.
Available
Planning
Server Sizing Conversation Starter
Turn workload, users, live-data growth and recovery needs into a practical requirements brief and validation plan.
Available
Planning
Backup Storage Estimator
Estimate capacity for source growth, changed data, retention tiers, immutability, full seeds and independent destinations.
Available
Planning
Recovery Priority Planner
Order technology recovery using business impact, downtime tolerance, RTO, RPO and named dependencies.
Available
Planning
Joiner–Mover–Leaver Checklist Builder
Build an owned, time-aware checklist for onboarding, role changes, access removal, devices, information and evidence.
Available
Planning
Incident Response Card Builder
Prepare a printable first-hour card with contacts, containment boundaries, evidence, communications and escalation decisions.
Available
Planning
Microsoft 365 Security Checklist
Review MFA, privileged access, legacy authentication, apps, sharing, audit evidence and recovery without a misleading score.
Available
Planning
Google Workspace Security Checklist
Review 2-Step Verification, super admins, OAuth apps, groups, sharing, audit evidence and recovery without a misleading score.
Available
Planning
Retail Technology Opening & Closing Checklist
Run repeatable POS, payment-terminal, connectivity, backup, reconciliation and shift-handover checks for a retail site.
Available
Planning
Supplier & Domain Handover Pack
Build an evidence-led acceptance pack for domains, DNS, hosting, repositories, services, recovery and outgoing access.
Available
Web
SSL/TLS Certificate Checker
Inspect a public website certificate's trust path, hostname coverage, expiry, key and negotiated TLS connection.
Available
Domains
Domain & DNS Inspector
See the public records that control a domain, website and business email.
Available
Domains
Domain Expiry & Ownership Checklist
Check reported registration dates and registrar details, then review who controls renewal and recovery.
Available
Domains
DNS Propagation Viewer
Compare DNS answers from named public resolvers and understand how TTL and caching affect what they return.
Available
Web
Redirect Chain Checker
Follow every HTTP redirect to the final address and spot loops, HTTPS downgrades, broken hops and unnecessary detours.
Available
Planning
Downtime Cost Calculator
Estimate what an hour of lost systems, checkout or staff time costs.
Available
Planning
Startup IT Budget Planner
Build an editable first-year technology budget across devices, setup, software, security, backup and support.
Available
Planning
Website Cost & Scope Estimator
Turn pages, content, design, integrations, commerce and care into a transparent delivery effort and planning range.
Available
Planning
Business Technology Continuity Planner
Create a private, prioritised recovery sequence for the technology your business relies on.
Available
Planning
Website Brief Builder
Turn goals, pages and integrations into a useful project brief.
No tools match that search yet.
Try a broader phrase such as email, domain, website, recovery or planning—or clear the filters to see the full library.
Built to be useful
Start with the evidence.
These tools are a small public service from ACA Tech Solutions. Each one aims to turn a technical question into evidence you can understand and a sensible next step.
Suggest a public toolAsk one clear question
Give the tool only the information it needs for that check.
Understand the result
Evidence, limitations and self-help steps are shown in plain English.
Choose what happens next
Fix it yourself, use an official service or ask ACA for practical help.
Useful work already exists