Website review cryptohack.org
CryptoHack – A free, fun platform for learning cryptography
Generated on December 27 2025 04:01 AM
Old data? UPDATE !
The score is 56/100
SEO Content
Title
CryptoHack – A free, fun platform for learning cryptography
Length : 59
Perfect, your title contains between 10 and 70 characters.
Description
A free, fun platform to learn about cryptography through solving challenges and cracking insecure code. Can you reach the top of the leaderboard?
Length : 145
Great, your meta description contains between 70 and 160 characters.
Keywords
Very bad. We haven't found meta keywords on your page. Use this free online meta tags generator to create keywords.
Og Meta Properties
Good, your page take advantage of Og Properties.
| Property | Content |
|---|---|
| title | CryptoHack – Home |
| description | A free, fun platform to learn about cryptography through solving challenges and cracking insecure code. Can you reach the top of the leaderboard? |
| type | website |
| url | https://cryptohack.org |
| site_name | CryptoHack |
| image | https://cryptohack.org/static/img/banner.png |
Headings
| H1 | H2 | H3 | H4 | H5 | H6 |
| 1 | 4 | 1 | 0 | 8 | 0 |
- [H1] CryptoHack
- [H2] Learn By Doing
- [H2] Level Up
- [H2] Learn Together
- [H2] Fresh Challenges
- [H3] Level Up
- [H5] New Challenges
- [H5] Weekly Top Users
- [H5] Recent Solves
- [H5] Recent Solutions
- [H5] CryptoHack
- [H5] Courses
- [H5] Categories
- [H5] Credits
Images
We found 8 images on this web page.
2 alt attributes are empty or missing. Add alternative text so that search engines can better understand the content of your images.
Text/HTML Ratio
Ratio : 30%
Ideal! This page's ratio of text to HTML code is between 25 and 70 percent.
Flash
Perfect, no Flash content has been detected on this page.
Iframe
Great, there are no Iframes detected on this page.
SEO Links
URL Rewrite
Good. Your links looks friendly!
Underscores in the URLs
We have detected underscores in your URLs. You should rather use hyphens to optimize your SEO.
In-page links
We found a total of 43 links including 0 link(s) to files
| Anchor | Type | Juice |
|---|---|---|
| Register | Internal | Passing Juice |
| Login | Internal | Passing Juice |
| scoreboard | Internal | Passing Juice |
| View more --> | Internal | Passing Juice |
| sujin | Internal | Passing Juice |
| moe0l | Internal | Passing Juice |
| aresinheaven | Internal | Passing Juice |
| valh4x | Internal | Passing Juice |
| tobira | Internal | Passing Juice |
| Romyna | Internal | Passing Juice |
| ClockUwU | Internal | Passing Juice |
| tera | Internal | Passing Juice |
| ndankar | Internal | Passing Juice |
| soec | Internal | Passing Juice |
| View more --> | Internal | Passing Juice |
| ispo | Internal | Passing Juice |
| Despoina | Internal | Passing Juice |
| orisharim | Internal | Passing Juice |
| View more --> | Internal | Passing Juice |
| FAQ | Internal | Passing Juice |
| Blog | Internal | Passing Juice |
| Introduction to CryptoHack | Internal | Passing Juice |
| Modular Arithmetic | Internal | Passing Juice |
| Symmetric Cryptography | Internal | Passing Juice |
| Public-Key Cryptography | Internal | Passing Juice |
| Elliptic Curves | Internal | Passing Juice |
| General | Internal | Passing Juice |
| Symmetric Ciphers | Internal | Passing Juice |
| Mathematics | Internal | Passing Juice |
| RSA | Internal | Passing Juice |
| Diffie-Hellman | Internal | Passing Juice |
| Elliptic Curves | Internal | Passing Juice |
| Hash Functions | Internal | Passing Juice |
| Crypto on the Web | Internal | Passing Juice |
| Lattices | Internal | Passing Juice |
| Isogenies | Internal | Passing Juice |
| Zero-Knowledge Proofs | Internal | Passing Juice |
| Miscellaneous | Internal | Passing Juice |
| CTF Archive | Internal | Passing Juice |
| Ouch.pics | External | Passing Juice |
| Thierry Fousse | External | Passing Juice |
| Tatyana Krasutskaya | External | Passing Juice |
| Privacy Policy | Internal | Passing Juice |
SEO Keywords
Keywords Cloud
ctf archive categories cryptography challenges view level crypto cryptohack more
Keywords Consistency
| Keyword | Content | Title | Keywords | Description | Headings |
|---|---|---|---|---|---|
| ctf | 9 |  |
|
|
|
| cryptography | 7 |  |
|
|
|
| archive | 6 | |
|
|
|
| challenges | 5 | |
|
|
|
| cryptohack | 5 | |
|
|
|
Usability
Url
Domain : cryptohack.org
Length : 14
Favicon
Great, your website has a favicon.
Printability
We could not find a Print-Friendly CSS.
Language
Good. Your declared language is en.
Dublin Core
This page does not take advantage of Dublin Core.
Document
Doctype
HTML 5
Encoding
You have not specified the document's charset. Use this free meta tags generator to declare document's charset.
W3C Validity
Errors : 0
Warnings : 0
Email Privacy
Great no email address has been found in plain text!
Deprecated HTML
Great! We haven't found deprecated HTML tags in your HTML.
Speed Tips
|
Attention! Try to avoid nested tables in HTML. |
|
Too bad, your website is using inline styles. |
|
Too bad, your website has too many CSS files (more than 4). |
|
Perfect, your website has few JavaScript files. |
|
Perfect, your website takes advantage of gzip. |
Mobile
Mobile Optimization
|
Apple Icon |
|
Meta Viewport Tag |
|
Flash content |
Optimization
XML Sitemap
Missing
Your website does not have an XML sitemap - this can be problematic.
A sitemap lists URLs that are available for crawling and can include additional information like your site's latest updates, frequency of changes and importance of the URLs. This allows search engines to crawl the site more intelligently.
Robots.txt
https://cryptohack.org/robots.txt
Great, your website has a robots.txt file.
Analytics
Missing
We didn't detect an analytics tool installed on this website.
Web analytics let you measure visitor activity on your website. You should have at least one analytics tool installed, but It can also be good to install a second in order to cross-check the data.
PageSpeed Insights
Device
Categories
Free SEO Testing Tool
Free SEO Testing Tool is a free SEO tool which provides you content analysis of the website.