glasp.co
Glasp: PDF & Web Highlighter for Researchers & Learners
Last scanned Jul 26, 2026, 1:19 PM
Overall score
Excellent
Summary
Glasp is a social web highlighter and AI learning assistant. This website uses Next.js hosted on Cloudflare behind Cloudflare CDN. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores excellent (95/100) and performance good (75/100). Top issue: Meta description longer than 160 characters.
Glasp
Glasp is a social web highlighter and AI learning assistant. Capture highlights from articles, PDFs, and videos, organize insights, and use AI to reflect on your learning journey.
- 548 Market St, PMB 26241, San Francisco, CA, 94104, US
- Hosted on Cloudflare
Products & pricing
Product and pricing information published in this site's own structured data.
Unlock Your Learning Potential 🚀
$180/year USD
Top issues to fix
3 issues found
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
SEO
2 issue(s) found
Performance
243 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
Glasp
Glasp is a social web highlighter and AI learning assistant. Capture highlights from articles, PDFs, and videos, organize insights, and use AI to reflect on your learning journey.
- Founded
- Jun 1, 2021
Contact
Email, phone, and address published on this site's own pages.
- hi@glasp.co
- Address
- 548 Market St, PMB 26241, San Francisco, CA, 94104, US
Meta tags
- Title
- Glasp: PDF & Web Highlighter for Researchers & Learners
- Description
- Highlight text on any webpage or PDF for free with Glasp. Collect insights, summarize YouTube videos with AI, and build a personal AI memory. Trusted by 1M+ researchers and learners on Chrome & Safari.
- Canonical
- https://glasp.co
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- max-image-preview:large
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 104.26.7.240
- ASN
- AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX |
|
| TXT |
|
| NS |
|
| CAA |
|
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Google Trust Services
- Subject
- glasp.co
- Valid from
- Jun 24, 2026
- Valid to
- Sep 23, 2026
- Days until expiry
- 56
- SAN domains
- glasp.co, *.glasp.co
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyEnabled
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 10 · H3 27
Links
62 internal · 20 external · 0 broken
Images
18 total · 0 missing alt
Scripts / Styles
172 scripts · 3 stylesheets
JS / CSS size
1.8 MB · 171 KB
Page size
866 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 267
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Meta description longer than 160 characters
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://glasp.co
- Final URL
- https://glasp.co
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 226 ms
- HTML size
- 866 KB
- Redirect chain
- https://glasp.co
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Frequently asked questions
- What technology does glasp.co use?
- glasp.co is built with Next.js, Cloudflare Analytics.
- Is glasp.co secure (HTTPS)?
- Yes. glasp.co uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Sep 23, 2026.
- Who hosts glasp.co?
- glasp.co is hosted on Cloudflare, behind Cloudflare CDN.
- What is glasp.co's SEO score?
- glasp.co scored 90/100 for SEO in the latest analysis (excellent).
- What is glasp.co's overall website score?
- glasp.co has an overall SiteGraph score of 90/100, combining SEO, performance, security, and accessibility.
- What company operates glasp.co?
- glasp.co is operated by Glasp. Glasp is a social web highlighter and AI learning assistant. Capture highlights from articles, PDFs, and videos, organize insights, and use AI to reflect on your learning journey.
- What products does glasp.co offer?
- glasp.co offers Unlock Your Learning Potential 🚀.
OpenGraph & Twitter Card
OpenGraph
Twitter Card