A practical toolkit of free, widely used tools for building websites and web apps: editor, version control, browser DevTools, linting and formatting, API testing, containers, performance and accessibility checks, hosting and monitoring.
You can build, test and ship professional web projects with free tools. The challenge is choosing a sensible set and learning them well, rather than collecting dozens. This is a practical starter kit, with notes on what each tool is for.
Editor
Visual Studio Code is free, runs on Windows, macOS and Linux, and has extensions for almost every language. Install only the extensions you need: each one can slow the editor and has access to your files. Alternatives include JetBrains' free community editions and Neovim for keyboard-driven work.
Version control
Git tracks every change and lets you undo mistakes, experiment on branches and collaborate. Learn the basics: status, add, commit, branch, merge, pull and push. Hosting services such as GitHub, GitLab and Bitbucket offer free private repositories. Add a .gitignore early, and never commit passwords or API keys; turn on secret scanning where your host offers it.
Browser DevTools
Every major browser includes developer tools. Use them to:
- inspect and live-edit HTML and CSS;
- debug JavaScript with breakpoints;
- see network requests, response codes and timings;
- test layouts at phone and tablet sizes;
- check storage, cookies and service workers.
Test in more than one browser engine: Chromium-based, Firefox and Safari (WebKit) can behave differently.
Linting and formatting
Prettier formats code automatically, ending arguments about style. ESLint catches likely bugs in JavaScript and TypeScript. Stylelint does the same for CSS. Run them in your editor and in automated checks.
API testing
curl is installed on most systems and is ideal for quick checks: curl -i https://example.com/api shows headers and the response. Graphical tools such as Bruno, Insomnia or Postman's free tier help organise collections of requests. Keep API keys in environment variables, not saved in shared collections.
Local environments and containers
Node.js with npm, or alternatives such as pnpm, runs most front-end tooling. A version manager like nvm or fnm lets you switch Node versions per project. Docker packages databases and services so everyone runs the same setup. Check licensing terms for Docker Desktop if you use it at a larger organisation.
Performance and quality checks
- Lighthouse, built into Chrome DevTools, audits performance, accessibility, best practice and SEO.
- PageSpeed Insights adds real-world data for popular pages.
- WAVE and axe browser extensions flag accessibility problems. Automated tools catch only some issues, so also test with a keyboard and a screen reader.
- The W3C validators check HTML and CSS.
Hosting and deployment
Static sites can be hosted free on services such as GitHub Pages, Cloudflare Pages and Netlify, with HTTPS included. Many connect to your Git repository and deploy automatically on each push. Check free tier limits on builds, bandwidth and commercial use.
Monitoring
Free uptime monitors alert you if your site goes down. Error-tracking services with free tiers capture JavaScript errors from real users. Set up alerts for certificate and domain expiry too.
Security basics
- Use two-factor authentication on Git hosting, registrar and hosting accounts.
- Keep dependencies up to date; automated tools can open update pull requests and warn about known vulnerabilities.
- Use the OWASP Top 10 as a checklist of common web risks.
A minimal starter set
- VS Code with Prettier and ESLint
- Git plus a free hosted repository
- Browser DevTools and Lighthouse
- curl
- A static host with automatic deploys
- An uptime monitor
Frequently asked questions
Do I need Docker for a simple site?
No. It's most useful when you need databases or several services.
Are free tools safe for commercial projects?
Most are, but check licences and free tier terms.
Sources and further reading
- Visual Studio Code documentation
- Git documentation
- Chrome DevTools
- MDN Web Docs
- OWASP Top 10
- W3C Markup Validation Service
Facts checked on 20 October 2026. Spotted an error? Tell us and we will correct it.