What technology does readwise.io use?

readwise.io is built with Django, jQuery, Google Analytics.

Is readwise.io secure (HTTPS)?

Yes. readwise.io uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 7, 2026.

Who hosts readwise.io?

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

What is readwise.io's SEO score?

readwise.io scored 70/100 for SEO in the latest analysis (fair).

What is readwise.io's overall website score?

readwise.io has an overall SiteGraph score of 89/100, combining SEO, performance, security, and accessibility.

readwise.io

Readwise

Last scanned Jul 26, 2026, 5:47 AM

Overall score

Great

Summary

Grow wiser and retain books better: Readwise sends you a daily email resurfacing your best highlights from Kindle, Instapaper, iBooks, and more. This website uses Google Analytics behind Cloudflare CDN. SEO is fair (70/100) and accessibility is excellent (100/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: Missing canonical link.

Grow wiser and retain books better: Readwise sends you a daily email resurfacing your best highlights from Kindle, Instapaper, iBooks, and more.

Top issues to fix

8 issues found · 1 high priority

Missing Strict-Transport-Security header
Security
Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
1 cookie without Secure/HttpOnly flags
Security
Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.
Multiple H1 headings found
SEO
Keep a single H1 per page and demote the others to H2/H3.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEO
Publish /robots.txt with a Sitemap: directive to guide crawlers.

+2 more issues — details in the sections below.

SEO

5 issue(s) found

100

Performance

899 ms

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

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

Grow wiser and retain books better: Readwise sends you a daily email resurfacing your best highlights from Kindle, Instapaper, iBooks, and more.

X (Twitter)X (Twitter)X (Twitter)X (Twitter)X (Twitter)X (Twitter)X (Twitter)X (Twitter)X (Twitter)X (Twitter)

Contact

Email, phone, and address published on this site's own pages.

Email: hello@readwise.io

Meta tags

Title: Readwise
Description: Grow wiser and retain books better: Readwise sends you a daily email resurfacing your best highlights from Kindle, Instapaper, iBooks, and more.
Canonical
Language: en
Charset: utf-8
Viewport: width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no
Robots meta
Manifest: https://readwise-assets.s3.amazonaws.com/static/images/favicons/site.b9aa277fcfc3.webmanifest

Technologies

Detected frameworks, languages, and tools.

Django jQuery Google Analytics

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: readwise.io
Valid from: Jul 9, 2026
Valid to: Oct 7, 2026
Days until expiry: 71
SAN domains: *.readwise.io, readwise.io

Security headers

Strict-Transport-SecurityMissing
Content-Security-PolicyEnabled
X-Frame-OptionsEnabled
X-Content-Type-OptionsEnabled
Referrer-PolicyEnabled
Permissions-PolicyMissing

Compression: gzip · 1 cookie(s) observed

Content & assets

Headings

H1 3 · H2 10 · H3 0

Links

13 internal · 36 external · 20 broken

Images

48 total · 2 missing alt

Scripts / Styles

20 scripts · 12 stylesheets

JS / CSS size

61.5 KB · 393 B

Page size

104 KB

Robots.txt & Sitemap

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

SEO issues

Missing canonical link
Multiple H1 headings found
No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://readwise.io
Final URL: https://readwise.io
HTTP status: 200
HTTP version: HTTP/2
Response time: 897 ms
HTML size: 104 KB
Redirect chain: https://readwise.io

See something wrong on this report? Request a correction

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