Free Tools
Small, useful tools. No signup, no catch.
A growing set of free utilities we built for our own work and made public. Nothing to install, no account required, and nothing you type here leaves your browser unless the tool says otherwise.
Website & Email3 tools
Plain-English report on your MX, SPF, DKIM, and DMARC, with steps to fix what is wrong.
- SPF, DKIM, and DMARC enforcement
- Reverse DNS and TLS hardening
- Catches Google Workspace / Microsoft 365 issues
- A letter grade and how to fix each finding
HTTPS, SSL, security headers, redirects, mixed content, and SEO basics in one plain-English report.
- HTTPS and certificate status
- Security headers and cookie flags
- Mixed content and redirects
- Title, viewport, robots, and sitemap
Check whether a site responds, how fast, and how many days remain on its SSL certificate.
- HTTP status and response time
- SSL certificate expiry in days
- Issuer and trust-chain status
- Catch expiring certs before visitors do
Infrastructure & Networking4 tools
Look up A, AAAA, MX, TXT, NS, CNAME, and SOA records for a domain, or reverse-resolve an IP.
- All common record types at once
- Reverse (PTR) lookup for IP addresses
- Resolved over DNS-over-HTTPS
- Great for email and migration debugging
Network, broadcast, host range, netmask, wildcard, and binary for any IPv4 or IPv6 block, plus subnet splitting.
- IPv4 and IPv6 support
- Usable host range and counts
- Netmask, wildcard, and binary
- Split a network into smaller subnets
See how much downtime each service level allows per day, week, month, and year, or the uptime you achieved.
- Allowed downtime for any "nines"
- Achieved-uptime calculator
- Plain-English SLA reference
- Runs entirely in your browser
Estimate backup storage, backup and restore time, and whether your RTO target is realistic.
- Storage need across copies (3-2-1)
- Initial backup and full restore time
- RTO feasibility and RPO guidance
- Runs entirely in your browser
General3 tools
Turn any link or text into a QR code and download it as a PNG or SVG. Generated instantly in your browser.
- Links, text, email, and phone numbers
- Live preview as you type
- Download as PNG or scalable SVG
- Nothing sent to a server
Generate strong, random passwords and tokens with a live strength estimate, entirely in your browser.
- Adjustable length and character sets
- Option to exclude look-alike characters
- Cryptographically secure randomness
- Nothing sent to a server
Translate a cron schedule into plain English and preview the next run times in your local timezone.
- Plain-English explanation of any schedule
- Next run times in your timezone
- Handy schedule presets
- Runs entirely in your browser
Beyond the tools
Need more than a one-off utility?
We help small teams and local government keep systems running, cut manual work, and control technology costs. If something here was useful, imagine what we can do with your whole stack.