What technology does draw.io use?

We did not detect any specific technologies for draw.io in the latest scan.

Is draw.io secure (HTTPS)?

Yes. draw.io uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 5, 2026.

Hosting provider information for draw.io is not available yet.

What is draw.io's SEO score?

draw.io scored 75/100 for SEO in the latest analysis (fair).

What is draw.io's overall website score?

draw.io has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.

Has draw.io's score changed over time?

draw.io's overall score has improved by 5 points (from 77 to 82) since Jul 26, 2026.

draw.io

Flowchart Maker & Online Diagram Software

Last scanned Aug 2, 2026, 3:00 PM · 6 views

Overall score

Great

Summary

draw.io is free online diagram software for making flowcharts, process diagrams, org charts, UML, ER and network diagrams. SEO is good (75/100) and accessibility is fair (60/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: No structured data (JSON-LD) found.

draw.io is free online diagram software for making flowcharts, process diagrams, org charts, UML, ER and network diagrams

Top issues to fix

7 issues found · 1 high priority

Over half of images are missing alt text
Accessibility
Add alt attributes to images — screen readers depend on them, and they help image SEO.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.
Missing OpenGraph tags
SEO
Add og:title/og:description/og:image so shared links render a proper preview card.
robots.txt not found
SEO
Publish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEO
Publish an XML sitemap and reference it from robots.txt to speed up page discovery.

+1 more issue — details in the sections below.

SEO

4 issue(s) found

100

Performance

107 ms

Security

HTTPS & header checks

Accessibility

2 issue(s) found

Score history

+5 overall since Jul 26, 2026

Overall: 82
SEO: 75
Security: 90
Performance: 100
Accessibility: 60

Organization

Company details published in this site's own structured data.

draw.io is free online diagram software for making flowcharts, process diagrams, org charts, UML, ER and network diagrams

Meta tags

Title: Flowchart Maker & Online Diagram Software
Description: draw.io is free online diagram software for making flowcharts, process diagrams, org charts, UML, ER and network diagrams
Canonical: https://app.diagrams.net
Language
Charset: UTF-8
Viewport: width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no
Robots meta
Manifest: https://app.diagrams.net/images/manifest.json

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider: —
CDN provider: Cloudflare
IP address: —
ASN: —

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: Let's Encrypt
Subject: diagrams.net
Valid from: Jun 7, 2026
Valid to: Sep 5, 2026
Days until expiry: 33
SAN domains: *.diagrams.net, diagrams.net

Security headers

Strict-Transport-SecurityEnabled
Content-Security-PolicyEnabled
X-Frame-OptionsMissing
X-Content-Type-OptionsEnabled
Referrer-PolicyEnabled
Permissions-PolicyEnabled

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 1 · H3 0

Links

0 internal · 0 external · 0 broken

Images

1 total · 1 missing alt

Scripts / Styles

2 scripts · 2 stylesheets

JS / CSS size

0 B · 223 B

Page size

2.7 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

No structured data (JSON-LD) found
Missing OpenGraph tags
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://draw.io
Final URL: https://app.diagrams.net/
HTTP status: 200
HTTP version: HTTP/2
Response time: 107 ms
HTML size: 2.7 KB
Redirect chain: https://draw.io → https://app.diagrams.net/

See something wrong on this report? Request a correction

Frequently asked questions

What technology does draw.io use?: We did not detect any specific technologies for draw.io in the latest scan.
Is draw.io secure (HTTPS)?: Yes. draw.io uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 5, 2026.
Who hosts draw.io?: Hosting provider information for draw.io is not available yet.
What is draw.io's SEO score?: draw.io scored 75/100 for SEO in the latest analysis (fair).
What is draw.io's overall website score?: draw.io has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.
Has draw.io's score changed over time?: draw.io's overall score has improved by 5 points (from 77 to 82) since Jul 26, 2026.