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Flashfilter

FlashFilter is a GPU accelerated screen filter for photosensitive epilepsy which can soften or remove flashing and strobing content before it reaches your eyes.

Added July 20, 2026 · Last analysed July 20, 2026 · via Hacker News · 73% unique tagline

Own this Launch?
Screenshot of Flashfilter

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 July 2026; the live site may have changed since.

Flashfilter looks production-ready overall, with a thorough launch checklist and clean crawl signals. Visible gaps: no Content-Security-Policy, incomplete legal pages, and incomplete email security.

Launched on Hacker News on July 20, 2026. The site is served through Cloudflare, with a domain registered 8 weeks before launch. We've detected 9 technologies on this site, covering CDN, DNS providers, business email, and frameworks. The stack includes Svelte, SvelteKit, and Cloudflare.

It's one of 46 launches on this exact stack and more locked down than the typical Hacker News launch.

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

7.4
StackScope Score
Good
100/100 Launch Readiness
Launch ready
5/6 Security Headers
Strong
0/3 Legal
Missing
2/2 Crawl files
Complete
94/100 Performance
Fast
Vibe Score 0 · No 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 (9)

Infrastructure
CDN Cloudflare
DNS Cloudflare DNS
Protocol HTTP/3
Security HSTS
Email
Business email Zoho Mail (2)
Build & Framework
Framework Svelte
Meta-framework SvelteKit (2)
Analytics & Marketing
SEO Google Search Console
Business Tools
SaaS Zoho

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
Let's Encrypt
Valid 24 May 2026 to 22 Aug 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
1 month
Registered May 2026 · CloudFlare, Inc.

Email Security

✓
SPF ~all Soft-fail (~all). Common and accepted.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
✗
DMARC p=none None (p=none). Monitoring only.
?
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 (0)

This site uses no client-side storage we could detect on page load.

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?

723 ms Server response
20% Faster than peers
1016 ms Largest contentful paint
0.03 Cumulative layout shift
180 KB Page weight
2 KB Image weight
1 Third-party domains
2 Console errors
2 Failed requests

⚠ 1 images: 1 oversized

Broken first-party requests (2), worth fixing
  • 401 /api/me
  • 401 /api/subscription

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

AI Stance

Welcomes AI crawlers
✓ 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 (7 URLs)
✗ security.txt
✓ llms.txt
✗ ads.txt
✗ humans.txt

Legal

? Privacy Policy not detected
? Terms of Service not detected
Detection works best on English language sites.

Security Headers (5/6)

✓
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

0 JS files
3 CSS files
1 Third-party domains

Brand Colours

App Manifest

FlashFilter
display: standalone 3 icons
theme #060a14
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.