useful-links
Curated list of useful links, tools and resources
Web development
- Website performance, SEO and security (online tools)
- WebPageTest - Their waterfall graph and connection graph is useful for optimizing your loading speed
- Techinical SEO - This site has several tools for SEO
- Freeformatter - This site has formatters, validators, encoders, decoders minifiers and converters
- KeyCDN - Several tools provided, website speed test and other network tools
- Uptrends - Website, CDN speed test and other tools
- Pingdom - Website speed test
- Scanning
- Dareboost - Provides recommendation
- Nibbler - Provides recommendation, free version only scan maximum of five links automatically from your website
- Lighthouse Metrics - Website that performs Google Lighthouse checking with version 6.0 and 5.6
- Google Pagespeed Insights
- Mobile friendly checking by Google
- A project using Server-Daten Scan and check a LOT of things including HTTPS, cookies, CSP, DNS, port checking and etc. It would took minutes. Use with caution
- Security focused
- Mozilla Observatory - Combines several third party scanning tools and display it. Recommended
- Immuniweb Community Free Security Tests - Free web/domain/SSL scan
- Sucuri- Free website security check & malware scanner
- Website and E-mail scanning - Initative of the Internet Community and the Dutch government
- Scanning HTTP headers and CSP
- Webbkoll - Checking CSP with detail explanation about GDPR and settings. Also support self-hosting. Recommended
- Security Headers Sponsored by Report URI
- Analyse CSP by report-uri
- CSP Evaluator by Google
- Redbot
- Gift of Speed - Display a list about the maximum cache age of the webpage, also have other tools in that website
- Cookies
- Webcookies - Scan what cookies are used and give recommendation
- Find out what technology is used in a website
- JSON-LD
- Verification
- Visualisation of strucuted data by Classy Schema - Recommended
- Rich Results Test with Rich Snippet Preview - Recommended, by Google
- Structued Data Testing Tool by Google - Replaced by Rich results Test, this tool is going to be removed
- Structured Data Linter - HTTPS of this website does not work correctly, browser giving out warning about hostname problem
- Generator
- Verification
- Robots.txt
- Monitoring and Reporting
- Security and Error reporting
- Sentry - Have free plan suitable for dev or small website. Also support self hosting but not reselling it (BSL license)
- Report-URI - Have free plan suitable for dev or small website
- Security and Error reporting
- Page preview
- Metatags.io - Preview how a webpage look like in Google Search, Facebook, Twitter, Linkedin, Pinterest and Slack
- Google, some tools are usable but not displayed in the search console by default
- PWA
- HTML
- Validator
- W3C Markup Validation Service - An online tool
- html5validator, written in Python - Command line tool
- Can I Use - Browser support table for modern web technologies
- Validator
- Front-end playground for testing code or demo