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Online Calculators & Tools

Explore free online calculators for games, school, finance, engineering, and everyday tasks, plus useful generators, converters, and other tools.

Added August 20, 2026 · Last analysed August 20, 2026 · via

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Screenshot of Online Calculators & Tools

StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 20 August 2026; the live site may have changed since.

Online Calculators & Tools ships with the basics, with a thorough launch checklist and clean crawl signals. What needs work: missing several security headers, incomplete legal pages, and tracking cookies set before any opt-in.

Launched on Product Hunt on August 20, 2026. The site is served through Cloudflare. We've detected 7 technologies on this site, covering analytics, CDN, CSS frameworks, and DNS providers. The stack includes Tailwind CSS, Cloudflare, and Cloudflare DNS.

It's running the same core stack as 7,177 other launches.

If you own this site, refresh the snapshot and see the full fix list any time →

5.9
StackScope Score
Fair
100/100 Launch Readiness
Launch ready
2/6 Security Headers
Weak
0/3 Legal
Missing
2/2 Crawl files
Complete
100/100 Performance
Fast
Vibe Score 20 · Few AI signals
How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (7)

Infrastructure
CDN Cloudflare
DNS Cloudflare DNS
Build & Framework
CSS framework Tailwind CSS
Analytics & Marketing
Analytics Google Analytics (4)
Microsoft Clarity (2)
SEO Google Search Console
Tag management Google Tag Manager (2)

Infrastructure

Network
CLOUDFLARENET - Cloudflare, Inc., US
AS13335 · US
DNS
Cloudflare DNS
Authoritative nameserver
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
Green hosting
Green hosted
Host runs on renewable energy. Data from The Green Web Foundation.
SSL Certificate
Google Trust Services
Valid 4 Aug 2026 to 2 Nov 2026
Certificate as captured in this snapshot, not a live check.

Email Security

✗
SPF Not published. Your domain can be spoofed in phishing emails.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
✗
DMARC Not published. Receivers fall back to permissive defaults.
?
MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.
?
TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Storage (2)

Cookies (2)
NameLifetimeDetected as
_ga 1y Google Analytics
_ga_6P1T8FB23S 1y Google Analytics

Readiness Breakdown How?

✓ Custom title and meta description
✓ Open Graph tags (title, image, description)
✓ Twitter card meta tags
✓ Canonical URL declared
✓ Responsive viewport meta tag
✓ Favicon present
✓ Semantic HTML (nav, main, article)

Performance How?

182 ms Server response
70% Faster than peers
388 ms Largest contentful paint
0.00 Cumulative layout shift
215 KB Page weight
1 KB Image weight
4 Third-party domains
0 Console errors
0 Failed requests

⚠ 1 images: 1 oversized, 1 missing alt text

Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.

Vibe Score Breakdown How?

SignalPoints
AI code-structure signals +20

This score is based on structural patterns and is not definitive. Many legitimate sites may trigger signals, and AI-built sites may go undetected. It should be treated as an indicator, not a verdict.

AI Stance

No AI stance declared
✗ llms.txt published
✓ No AI bots blocked in robots.txt
Content-Signal
? No directive declared
Link headers
? None advertised

Well-Known Files

✓ robots.txt
✓ sitemap.xml (1 URLs)
✗ security.txt
✗ llms.txt
✗ ads.txt
✗ humans.txt

Legal

? Privacy Policy not detected
? Terms of Service not detected
? Consent manager not detected
Analytics set tracking cookies on our visit, with no opt-in step.
Detection works best on English language sites.

Security Headers (2/6)

✓
Referrer-Policy
✗
X-Frame-Options
✗
Permissions-Policy experimental (check browser support)
✓
X-Content-Type-Options
✗
Content-Security-Policy
✗
Strict-Transport-Security
–
X-XSS-Protection deprecated (use Content-Security-Policy)

Build

3 JS files
1 CSS files
4 Third-party domains

Brand Colours

App Manifest

OnlineTool.me
display: standalone 3 icons
theme #0f766e
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.