September 3, 2020

Free Online Web Development Tools

Free Online Web Development Tools


Looking to improve your web development productivity? You got to the right place! Look around for essential or interesting free web development tools (web dev tools) suitable for both beginner and professional users (webmasters, developers, marketers, designers, and system administrators), that will help you to improve your productivity, boost creativity, and learn how to become a better developer. Moreover, most of the services listed here will save you a lot of time and money.

We cover many types of tools on our list and for each one, we tried to give at least three different options, so you'll pick the one who you find the most suitable for you. It's including Website Speed Test and Performance Optimization, DNS Analysis, SSL Test, Security Checkers, Code Validators, Cross-Browser Compatibility Testing, Online IDE, and more...

These tools allow you to test and debug (including simulating user browsing), improve your code, and make it error-free (HTML, CSS, JS), which will result in better user experience. You must check them out! This article won't give you an answer to what are the best web development tools on the web, for that you'll need to find out yourself by testing each one individually. But you should know for sure, you should know about these web development services!

While building this website over the years we used some of these tools listed below and we wanted to share them with you too! We also have more collections of free useful tools: Free SEO Tools or Free Web Design Tools and Resources.

Did you know? browsers free built-in tools!

You should know that most popular web browsers (such as Firefox, Google Chrome, and Microsoft Edge) already have built-in tools for professional web development, which are offered for free and do not require additional modules or extensions, meaning you can use them right in the browser:

Free Website Builders

Free website builders for webmasters who want to deploy beautiful, professional, and responsive websites fast and easily with a couple of clicks, without the hassle of coding and designing. You can create any type of website you desire for pretty much any topic, whenever it's a personal website, blog, online store, showcase, landing page, or a corporate page. With website building platforms you won't need any technical experience! No coding (HTML/CSS/JS) skills or any development experience are required! You should note that some of the services will show small ads on the website.
  • WIX - A powerful yet easy-to-use drag-and-drop website builder for free. Choose your design from 500+ ready-to-use responsive templates. Uses by 140+ million users around the world.
  • Weebly - A powerful yet simple free drag-and-drop website building service.
  • WebFlow - A powerful website building platform to simply create a website penny-free. Over 40 million users.
  • Site123 - A modern platform to build custom websites fast with just a few clicks. 250+ templates available.
  • IMCreator (XPRS) - A free web site builder to craft and publish free websites.
  • WordPress - One of the world’s most popular website builders/CMS (Content Management System).
  • Google Sites - Very simple tool from Google to build free websites without the need to know programming languages.
  • Carrd.co - A free website building platform to craft a one-page websites.
  • Ucraft Website Builder - A free professional block-based website builder.
  • Strikingly - A free website building service to create, design and publish free websites with no coding or design skills.

Website Speed Test & Performance Optimization

Analyze your website load speed, and learn how to increase your webpage performance and improve user experience with advanced optimization tips and recommendations. Page speed is also a ranking factor so these tools will help you to improve your SEO too.
  • Google PageSpeed Insights - An free online tool from Google that will help you to get your webpage run faster. This tool will give you insights for both desktop and mobile versions.
  • Web.Dev - Test your website performance. Then, get suggestions how to optimize your website speed.
  • GTmetrix - A popular tool that analyzes your webpages and give you a detailed overview on your website performance.
  • Pingdom - An advanced tool to analyze the performance of your websites.
  • GF.Dev - Get an insights on how fast your site loads.
  • WebPagetest - Run a free website speed audit.
  • Uptrends - Test your website performance in the latest versions of most popular browsers.
  • YellowLab - A free tool to detect performance and front-end code quality issues.
  • Varvy SEO Pagespeed - Find out what is slowing down your site.
  • Dotcom-Monitor - Test your website speed from multiple locations worldwide.
  • GiftofSpeed - Offer website speed test tools, and techniques to optimize page speed.
  • KeyCDN Website Speed Test - A full-page speed test that can be performed from 14 different locations around the world.
  • KeyCDN Performance Test - Analyze your website performance (load times) on multiple areas across the globe.
  • Sucuri Performance Test - Find how long it takes to connect to your site and for one page to fully load.
  • Hubspot Website Grader - A free tool from Hubspot to check your website speed and get recommendations how to improve it.
  • Bitcatcha Server Speed Checker - Check what is your web hosting server response time.
  • ByteCheck - Check the responsiveness of your webserver and network resources.
  • BatchSpeed - A free tool to perform multiple Google PageSpeed Insights tests and easily identidy slow pages on your website.

All-In-One Website Analysis Tools

Perform a website insight of code quality, security, accessibility, and performance.
  • DareBoost (Free Plan) - A comprehensive yet easy-to-use all-in-one website quality analysis and performance optimization tool. Get an audit of your website's quality with a lot of advanced optimization tips. Both web and SEO professionals can found it very useful. Free plan offers 5 test per month.

DNS Analysis Tools

Perform a DNS lookup from multiple countries.
  • DNS-Map DNS Propagation Check - DNS lookup service for checking domain name server records against a randomly selected list of DNS servers in different corners of the world.
  • Check-Host DNS - DNS checking is very usefull for monitoring domain of any website. It gets an entry for hostname or IP from nameservers in different countries at one time.
  • ViewDNS - View a complete report on the DNS settings for your domain.
  • DNS.Computer - Generate DNS audit for your domain.
  • WhatsMyDNS - Perform a DNS lookup to check a domain names current IP address and DNS record information against multiple name servers located in different parts of the world.
  • DNSChecker.ORG - Free DNS lookup service for checking domain name server records against a randomly selected list of DNS servers in different corners of the world.

SSL Certificate Testers

Diagnose your SSL certificate configuration of your domain.

Security/Domain Reputation/Trust Checkers

Find out if your website is safe from malware, and check your domain reputation/trust.
  • Google Transparency Report - Safe Browsing is a service that Google's security team built to identify unsafe websites across the web and notify users of potential harm.
  • VirusTotal - Analyze suspicious files and URLs to detect types of malware, automatically share them with the security community.
  • Quttera Website Malware Scanner - Check your website for malware and vulnerability exploits online.
  • Sucuri Malware Scanner - Check website for known malware, viruses, blacklisting status, website errors, and out-of-date software, and malicious code.
  • ImmuniWeb Website Security Test - GDPR & PCI DSS Test, Website CMS Security Test and more.
  • UpGuard Website Security Scan - Free Website Security Test. Get a free risk assessment of that website.
  • Mozilla Observatory - Scan your site and learn how to configure their sites safely and securely.
  • Web Of Trust - for safety checks on any website based on community ratings, reviews, and ML algorithms.
  • Norton Safe Web community - Reputation service from Symantec. Get your site ranked by the Norton Team.
  • SiteSafety By TrendMicro - Analayze your website with one of the largest domain-reputation databases in the world.
  • URLVoid - This service helps you detect potentially malicious websites. Analyze a website through 30+ blacklist engines.
  • IPVOID - Check if a domain name is classified as potentially malicious or phishing by multiple well-known domain blacklists like ThreatLog, PhishTank, OpenPhish, etc.
  • Security Headers - Get a security report of your headers.
  • Webbkoll - helps you check what data-protecting measures a site has taken to help you exercise control over your privacy.

Validate Code

Tools to validate your website code (HTML, CSS, JS) quality.

Responsive Testing Tools

Free responsive design testing tools.
  • ReadyMobi - Check if your website mobile ready.
  • Responsinator - Check if your website is responsive.
  • Google Mobile Friendly Test - Check if your webiste is mobile friendly.
  • Responsive Design Checker - Check how responsive is your website.
  • Screenfly - Test your website on any screen size including desktops, tablets, televisions, and mobile phones.
  • Chameleon - Chrome extension that lets you quickly view the responsiveness of your web app in multiple device viewports.
  • Viewport Resizer - Responsive testing chrome extension to easily test your website responsiveness.
  • Responsive Viewer - A responsive design testeing chrome extension to check your website responsiveness on multiple screens once.

Cross-Browser Compatibility Testing

There are plenty of different web browsers that each one comes in many different versions. These tools help you to test your website among 1000+ different browsers versions and to make sure your website working correctly on all of them. Some of them allow you to simply take screenshots and others allow you to perform a live test on a cloud virtual machine. You can check the browser market share worldwide.
  • BrowserShots - Generate screenshots of over 200 different browsers.
  • Browserling - Cross-browser testing tool to test your website with most popular browsers.
  • IE NetRenderer - A free screenshot service.
  • Sauce Labs - Testing service to check websites compatibility across multiple browsers.
  • LambdaTest (Lite Free Plan) - Perform Live Interactive and Automated Cross Browser Testing on 2000+ Real Browsers and Operating Systems Online.

Regex Debuggers

  • Regex101 - Online regex tester.
  • RegexTester - A free regular expression tester.
  • Debuggex - Test your regex by visualizing it with a live editor.
  • IHateRegex - Find Ready-Made Regex Patterns.

Minify, and Compress Code

Make the size of your source code much smaller with HTML, CSS, and JS minification and compression tools. Compress your files up to 90% of their original size by removing unnecessary characters (such as whitespace), combining duplicate elements, shorten element names, and more techniques. These tools will help you to improve your website's load time, get cleaner code, improve your programming style, and reduce bandwidth consumption of your server. You should note that your code might not be readable anymore.
  • Google Closure Compiler - Google's Javascript minification tool to optimize your Javascript code and make it smaller.
  • Refresh-SF - Minify your JavaScript, CSS and HTML. This tool uses UglifyJS 2, Clean-CSS and HTML Minifier. This tool has not been updated since 2016.
  • JSCompress - Online JavaScript compressor to save up to 80% of your JS code size. This tool is using UglifyJS 3 and babel-minify.
  • Javascript Minifier - Online JavaScript minification tool.
  • Official Clean-CSS - The official browser-compatible build of Clean-CSS - a CSS compression tool. This service only works by uploading css files to the server.
  • Adamburgess Clean-CCS - Another online CSS minification tool that is powered by Clean-CSS to minimize CSS source code.
  • Minifier.org - Reduce the size of your JS and CSS files. Powered by Matthiasmullie minify solution.
  • CCSMinifier - CSS compression tool.
  • HTML Compressor - Reliable tool to reduce the size of HTML, CSS, JavaScript, PHP and Smarty code.
  • Unused-CSS - Detect Unused CSS on your website.
  • JitBit UnusedCSS - Scan your website for unused CSS selectors.
  • DirtyMarkup - Tidy up your HTML, CSS, and JavaScript code.

Difference Checkers

Free online diff tools to visually compare two files (text, source code, pdf, etc) against each other to find differences.
  • DiffChecker - An advanced online comparison tool to find the differences between two text, pdf, or image files.

Protect Your Javascript Code

Free online JS obfuscator tools to protect your javascript code from theft or reuse. Using advanced algorithms these services transform your code and make it difficult to understand by humans. Although it's impossible to get 100% protected code, it will at least hide it from noobies programmers trying to steal your projects. For most of the obfuscators listed here, users can just use a JavaScript beautifier (f.e Beautifier.io) to make it readable again but beware some obfuscators are one-way and cannot be reversed-engineered using this method. These services will also compress and optimize the code to improve website performance and saves server bandwidth.
  • Javascript2Img - Unique way to to encrypt your javascript source code from theft or reuse. The code generated by this tool is protected even from JavaScript beautifiers trying to revert the encryption back.
  • FreeJSObfuscator - A free online Javascript obfuscator makes your code harder to read. Beaware that the protected generated code cannot be converted back to original source code.
  • Javascript-Obfuscator - Advanced online tool to protect your javascript source code from copying by making it unreadable to humans. This service can be used for free on commercial websites.
  • Obfuscator.io - A free javascript obfuscator to encrypt your javascript code making it harder to read to protect it from theft or reuse.

Free CDNs for Open-Source Third Party Libraries

Free public content delivery networks (CDN) that host javascript libraries (such as jQuery), fonts (such as Google Fonts), and CSS frameworks (such as Font Awesome, or Bootstrap), and serve them from multiple server points around the world with better cache mechanism to increase website performance. These services provide fast, reliable, and automated solutions for serving files on the web with no bandwidth limits.
  • Google Hosted Libraries - The Google Hosted Libraries is a reliable global CDN that hosts the most popular, open-source JavaScript libraries.
  • jsDelivr - A public, open-source CDN developed to provide secure and fast way to serve open-source third party libraries on websites.
  • Cdnjs - A free and open source content distribution network that is powered by Cloudflare to serving third party JS libraries. Supports HTTP/3, HTTP/2, QUIC, SPDY, HSTS & HTTPS. Host almost 4000 libraries.
  • PageCDN - A free public CDN for serving third party libraries to accelerate website load-time.
  • Microsoft Ajax - Free and open source content distribution network powered by Microsoft that host popular hird party JavaScript libraries such as jQuery.

Web-based IDEs and Code Editors

Cloud-based Code editors and IDE (Integrated Development Environment)/WYSIWYG (What You See Is What You Get) Editors to test your coding skills and debug your code. Most of these tools allow you to get a live preview of your code.
  • jsFiddle - Playground for web developers, an online editor for web snippets. Helps to isolate bugs.
  • Bootstrap Editor - Playground for JavaScript, CSS, HTML5 and jQuery.
  • JS Bin - Front End Developer Playground & Code Editor for HTML, CSS, and JavaScript.
  • CodePen - Online IDE for HTML, CSS, and JavaScript code editing.
  • CodeSandbox - An online code editor tailored for web applications.
  • Mozilla Thimble - An online code editor that makes it easy to create and publish your own web pages while learning HTML, CSS & JavaScript.
  • MyCompiler - An online IDE to edit, compile and run code. supported languages include: Java, C, C++, C#, Ruby, Python and more...

Free Website Monitoring

Free website monitoring services to watch over your website health, uptime or page speed and get alerts when a problem is detected (like when your website is down or when there is a performance issue).
  • StatusCake (Free Plan) - A freemium service that offers website uptime (5-min interval), and page speed monitoring for free.
  • Cula.io (Free Plan) - A freemium service that notifies you about website downtime. Free plan offers 2-min interval, and up to 50 URLS.
  • PingPing.io (Free Plan) - A uptime monitoring tool to get notfied when a website is down or when a SSL certificate got invalid. Free plan offers monitoring of two websites every 30 seconds.
  • Hexometer (Free Plan) - A website health monitoring tool thats offers automatic uptime, broken links, JS error, security vulnerabilities, and page speed monitoring.
  • UpTimeRobot (Free Plan) - A uptime monitoring service tool to detect when your website is down. Free plan is limited to 5-minutes checks and 50 monitors.

Web Development Communities

Online web development communities/question and answer sites that allow developers to help each other by asking questions. Connect programming communities to learn how to code, develop your development skills, solve coding problems with the help of professional developers around the world, or share your own programming knowledge with others.
  • StackOverFlow - A trusted and popular global web development community with over 4.7 million programmers ready to assist you with your programming issues.
  • FrontEndFront - Feed of articles from front-end developers. Share your work, or intersting coding stuff with the world or ask questions related to front-end develoment.
  • SitePoint Forums - Feed of articles from front-end developers. Share your work, or intersting coding stuff with the world or ask questions related to front-end develoment.
  • WebDeveloper.com Forums - A community where you can discuss with others developers to become a better developer and extend your programming skills.
  • CoderWall - Web development discussion to get coding tips, inspired by others projects, or find solutions to coding bugs.
  • FreeCodeCamp - A global web development community to learn how to code, or solve coding problems.

Miscellaneous

  • SeoBility's Redirect Check - Discover SSL or WWW redirect problems in your website.
  • TextMechanic - Find and Replace Text.
  • Favicon.cc - A tool to create or download favicon.ico icons.
  • Whats My Browser Size - Find out what is your browser size.
  • BuiltWith - Find out what websites are Built With.
  • HTTPStatus - Easily check status codes, response headers, and redirect chains.
  • SeoBook Server Header Checker - Show Server Headers for a Webpage.
  • SpriteGen - Free CSS sprite generator. sprite is used to combine multiple images into one image and use CSS properties to display the different images. It is helpful to reduce the number of HTTP requests resulting in increased website performances

That's it! if you have any suggestions please feel free to contact us by email. Hope we helped you!