Mobile simulator - responsive testing tool
Extension Actions
- ★Featured
- In-App Purchases
Smartphone and tablet simulator on computer with several models to test mobile responsive websites.
🚀 Simulate mobile viewports, check responsive web design, create impactful client demos, and save hours of testing.
Mobile FIRST is the most powerful and reliable responsive simulator extension, trusted by developers and designers for over 5 years. Our rating on the Chrome Store speaks for itself!
📱 PRE-CONFIGURED DEVICES (New ones added regularly)
• 58+ devices ready to use out of the box
• 45 smartphones (old and recent models)
• 5 tablet models
• 11 special devices (smartwatches, kiosks, desktop...)
🔥 NEW & MAIN FEATURES
• 📱📱 Multi-device comparison: View and test multiple devices side-by-side simultaneously for faster responsive checks
• 🛠️ Custom devices: Create and save your own devices with custom screen resolutions and viewports
• 👆 Realistic touch scrolling: Simulates native finger gestures for an authentic mobile browsing feel
• 🎬 One-click video capture (WEBM, GIF, MP4) for your demos and tutorials
• 📸 Transparent PNG screenshots, perfect for client emails or presentations
• 🌚 Dark mode for enhanced visual comfort
🎁 ALSO INCLUDED
• Free downloadable transparent device mockups
• Seamless landscape mode switching
• Realistic zoom mimicking actual mobile behavior
• More than 10 customization options (PWA mode, fullscreen, native keyboard, etc.)
✨ Inside Mobile FIRST, many technical tricks are integrated to reproduce the mobile experience as closely as possible.
(Note: While highly accurate for day-to-day dev, this simulator does not replace final testing on a real device for 100% full validation)
Latest reviews
- Abhishek Yadav
- Great extension just its ask for premium for some specific devices so we need to focus over there .
- Kat Walker
- As a UX designer who has to do a lot of QA and site auditing, this is the greatest plugin ever created.
- Sergey Kosmin
- Great for mobile version adjustments
- Charles Alford, ATP CFII
- Amazing extension for what it does!
- Kovvuru Naseer
- nice extenstion
- Maksym Stepanov
- Love the app. Using it daily
- Agrim Gupta
- Best tool to test responsiveness
- Said Sadiki
- thank you for this chrome extention. i really help us deliver the best reponsive products to our clients
- Ahmad
- Very helpful. As a website developer, I use it very often.
- sandeep
- Awesome
- Intis Kalnins
- My go-to tool for mobile responsive testing. So much easier than triggering Inspect mode.
- r feby harison
- help me a lot as webdesigner
- Carlos Vazquez
- Incredible, I really love it
- Support Nettify
- very nice
- Manuel Isola
- Super
- Henry Belmonte
- A must have tool for responsive validation when designing your websites
- Marko Curovic
- I use it every day. Great help.
- sujith IPIX
- Greate and very usefull
- Eliakim Wedam Kubirizegah
- Great extension
- Ian Macharia
- I love this extension, I only use for testing responsiveness across different devices when building websites!
- Scott Kindred
- The fastest, most useful tool for checking responsive website design.
- Jose Qui
- Great extension!
- Royce Joe
- worked exactly as i wished it to be.
- Joshua Ajagbe
- Nice app, lovely idea, good for developers.
- Elhabib Oumaima
- So far so good, I like all the functionalities included.
- Erwin Ocobillo
- like it! Specially the offline option. I can check my projects offline.
- Maria Danica R. Esparrago
- very helpful as a developer who tests her site's responsiveness
- Viper
- I like It
- Copper Bridge
- Help a lot thanks
- Oybek Kurbanov
- gooooooood but have some -
- Harshita Sh
- Excellent, i love it.😍😍😍
- Web Developer
- Very beautiful extension. I am excited.
- Faeze M
- Highly useful
- Justin Bryce
- Love this tool. it makes it really easy to check how a webpage will appear on a mobile device.
- Mouhamed Xumaa
- Thank you ❤️❤️❤️❤️
- Enudeme Chukwuka
- amazing love it, the best among all and also thanks we now have acces to dynamic island iphone ❤️❤️❤️❤️❤️
- Victor Vela
- Been using this for years to test layouts, amazing. Love it. Thanks for the solid work ladies & gents.
- My Lefkada Creative Studio
- Just Perfect!
- Febrian
- stable
- Mohit Halduniya
- The best responsive testing extension on the market! Super intuitive, lightweight, and packed with features. The touch-scrolling feels incredibly realistic, and having over 50+ devices ready to test out of the box is fantastic. If you are a front-end developer or UI/UX designer, this is a must-have tool. 5 stars all the way!
- Ace Vincent Arevalo
- its does what i need it to do. that's all you can ask for a free extension.
- Milan Rai
- very useful one
- BHAVYAL SALES
- very very very useful, thank you
- Emilio Jeldrez
- Is great! Just missing an option to hide the browser url and navigation buttons from the device. I just want to see the site without that. It takes too much space.
- Zawad Ishrq
- this is finest extension.
- Malay Kar
- Finally a good tool to check your pages and apps on various devices
- Ramon MC
- Excellent for web development for mobiles. Can no longer live without it. I keep the plug-in active most of the time, if the webpage looks good through Mobile simulator - responsive testing tool it will look good from mobiles, tables or desktop PCs.
- RUKUNDO El Shaddai
- There is no better choice than going with this extension, since 2022 in my software career journey, I have been using this to test my app responsiveness. I recommend you to go with this among other available extensions.
- Muhammad Adil
- Good and Perfect tool
- Freaksional Studio
- This is an awesome product. It does what it says it does, and even better.