Why this site exists
Most free developer tools online share the same problems. They want an email address before showing you anything. They bury a simple converter under three layers of upsell. They upload whatever you paste to a server you know nothing about. And too often they hand you an answer with no explanation of why it's the right one.
FrontendHelpers was built as the opposite of that. Every tool here does its job the moment you open the page, explains the reasoning behind what it produces, and never asks you for anything.
Everything runs in your browser
This is the principle the whole site is built on. Every one of the 16 tools processes your input client-side, in your own browser, using JavaScript that ships with the page. Nothing you type is transmitted, stored or logged anywhere — not your meta descriptions, not your business details, not the article you paste into the keyword analyser.
You can verify it: open your browser's Network tab and use any tool on this site. You'll see no requests carrying your data, because there are none. Disconnect from the internet entirely and every tool still works.
The only on-device data the site keeps is your cookie choice and your Dev Essentials checklist progress, both in localStorage, both invisible to us, and both cleared whenever you clear your browser data.
Built by hand, deliberately
This site is written in plain HTML, CSS and vanilla JavaScript. No framework, no build step, no dependencies. That's a considered choice rather than a limitation: it keeps pages fast, means there's no supply chain to audit, and ensures nothing here breaks because a package updated.
It also means the code does what you'd expect. Every CSS animation in the library is the exact CSS you copy — the previews aren't mock-ups, they're the real thing running live. Every JavaScript snippet is dependency-free and pastes cleanly into any project.
What's on the site
- 16 free tools for SEO, HTML and CSS — meta tags, schema, robots.txt, UTM links, colour palettes, gradients, contrast checking and more.
- 72 CSS animations with live previews and seven interactive lessons covering colours, specificity, z-index, responsive design, scrollbars, theme tokens and positioning.
- 32 JavaScript tricks that explain why professionals use them, with runnable demos.
- Dev Essentials — the knowledge that isn't code: security, performance, accessibility, Git, deployment, testing and privacy, with checklists that save your progress.
- React vs Angular compared side by side across eight real tasks.
- Practical guides to the problems developers actually hit.
How it's funded
The site is supported by advertising, and that's the whole business model — there's no paid tier, no premium version and nothing held back. Ads are kept deliberately unobtrusive: never at the very top of a page, never blocking content, and never interrupting a tool while you're using it.
Advertising and analytics cookies are off by default and only activate if you accept them in the consent banner. You can change that choice at any time via "Cookie Settings" in the footer, and the site honours the Global Privacy Control browser signal automatically. The privacy policy sets out exactly what is and isn't collected.
Everything here is free to use
All generated output and every published snippet — CSS, JavaScript, markup, colour values — is free to use in personal and commercial projects with no attribution required. Copy it, change it, ship it. The terms of service spell this out formally, along with the usual reminder to test anything before it reaches production.
Get in touch
Found a bug, spotted something inaccurate, or want to suggest a tool? Email hello@frontendhelpers.com. Corrections are genuinely welcome — the technical content here is written to be accurate, and if something is wrong or out of date, it gets fixed.