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In the WordPress editor, open the page, post, template, or site you are working on, choose View in the top toolbar, and select Mobile. Check Tablet as well, drag the canvas handles to test an in-between width, then open the front end with Preview in new tab (Block Editor) or View site (Site Editor). For the most accurate result, inspect that rendered page in a browser and, when possible, on an actual phone.

Use WordPress’s built-in mobile canvas preview

The current unified View controls are documented for WordPress 7.1 and were updated on August 19, 2026. Older screenshots may show the controls in a different location. The workflow applies to posts, pages, templates, and the site itself.

  1. Open the page or post in the Block Editor, or open the relevant template or site in the Site Editor.
  2. Select View in the top toolbar.
  3. Choose Mobile to switch the editing canvas to a phone-sized width. Select Tablet and Desktop too, rather than checking only one preset.
  4. After choosing Tablet or Mobile, drag the canvas resize handles to test widths between the presets. The editor state and canvas update together as the width changes.
  5. Inspect the entire layout: header, navigation, content, images, forms, sidebars, and footer. If available, turn on Show template when you need to see page content together with its template.

The View menu is an editing aid, not a substitute for checking the rendered page. WordPress documents the controls in How to use the View feature.

Check the rendered front end separately

Block Editor

Choose Preview in new tab. This opens the front-end rendering separately from the editor canvas, so you can check the page as visitors receive it.

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MNN 15.6" FHD 60Hz Portable Monitor USB-C HDMI IPS HDR Gaming Laptop
  • Full HD Portable Monitor - MNN 15.6inch portable laptop monitor with 1920*1080 resolution, advanced IPS glossy screen support 178° full viewing angle, it renders accurate and bright color, draws you into the video or game with lifelike colors and amazing detail.It can effectively reduce blue light radiation damage, no flickering, eye-care, and make it easier to watch for a long time.A second monitor for working from home.
  • Double Type-C Port -For Plug & Play, the MNN monitor provides 2 Full Feature Type-C ports. Only One USB Type-C Cable is required to connect to the power supply & display signal transmission. NOTE: Your device should support thunderbolt 3.0 or USB 3.1 Type C DP ALT-MODE.which supports multiple connect ways to your laptops, PC, Phones, Macbooks, PS5/PS4, Xbox, and Switch.
  • Lightweight Ultra Slim for Travel - As a portable external monitor,MNN portable laptop monitor easily accommodate to every suitcase and backpack and stress-free when you are holding it for a long time. They are truly portable computer monitors for travelers, students, gamers,engineers, and everyone.
  • Give consideration to work and games - through multiple display modes [Copy Mode/Extended Mode/Second Screen Mode/Portrait Mode], we can bring you a clear second screen in the meeting, and expand the screen anytime and anywhere to improve work efficiency and improve the quality of life. Adjusting to HDR mode can upgrade the image to a new level, providing you with brighter highlights,deeper and more realistic colors, more realistic images, and amazing viewing/gaming experience.
  • Powerful Smart Cover - MNN portable external monitor can work in both landscape and portrait mode, can be used as a gaming monitor, screen extender for laptop or phone. Comes with a scratch-proof smart cover made of durable PU leather exterior, doubles as a stand, provides comprehensive protection for this portable computer monitor.

Site Editor

Choose View site to open the site front end. Check the saved or published result, including template parts such as the site header and footer.

WordPress.com Support puts the distinction plainly: “For the most accurate preview, view your site directly in a browser or on your mobile device.” (WordPress.com Support.)

Rank #2
Anyuse 15.6" FHD IPS USB-C HDMI Portable Monitor
  • 15.6" FHD Portable Monitor - Featuring a 1920*1080P resolution, 178°FULL viewing angle, HDR, and Low Blue Light Super Clear IPS A-grade screen, this Anyuse portable screen for laptop enhanced visual experience, reduces eye strain and fatigue.
  • Double Type-C Port -For Plug & Play - Anyuse portable monitor features 2 full-featured Type-C ports and 1 MINI HDMI port. You can easily access your favorite devices with just one USB Type-C or MINI HDMI cable. NOTE: Your device should support Thunderbolt 3.0/4.0 or USB 3.1 Type C DP ALT-MODE.
  • Portable & Light Weight - At just 1.37lbs and 0.04 inch thin, this portable laptop monitor is ultra-portable and perfect for on-the-go productivity or gaming. flexible to use anywhere you need a second screen for laptop. bringing you efficiency for meetings, work from home, and presentations.
  • Able to Balance Work and Play - With multiple display modes [copy mode/extension mode/second screen mode]. During meetings,it can copy your laptop's content as a second screen to share with others.At work, it can be used as a second extended screen to increase productivity. In life, adjusting to HDR mode can upgrade the image to a new level, providing you with brighter highlights, more realistic colors and images.Two built-in speakers provide an amazing viewing and gaming experience.
  • Wide Compatibility - Enjoy hassle-free plug-and-play functionality with the portable monitor. it is compatible with all devices equipped with HDMI and USB Type-C ports like laptops, PS, XBOX, SWITCH game consoles, No app or driver installation required.

Test widths beyond the three presets

In the front-end tab, resize the browser window or use its device/responsive view to inspect additional viewport widths. WordPress’s 7.1 testing guidance recommends checking desktop, tablet, and mobile widths this way and then checking the saved or published page (Help Test WordPress 7.1).

A real phone or tablet provides an additional practical check of the live front end. It is not a guarantee that every physical device will render identically to a browser simulation, but it can reveal touch, scrolling, font-loading, and interaction problems that are easy to miss in the editor.

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Rank #3
InnoView Portable Monitor, 15.6 Inch FHD 1080P HDMI USB C Second External Monitor for Laptop, Desktop, MacBook, Phones, Tablet, PS5/4, Xbox, Switch, Built-in Speaker with Protective Case
  • [Portable Monitor Laptop] InnoView laptop screen extender is no need of app and drivers! 15.6 in is a more suitable size for traveling or remote work. Suitable for traveler, student, gamer, engineer, and white-collar worker to connect HP laptop, Lenovo laptop, Dell laptop, Asus laptop, Macbook, iPhone, game console, tablet, PS, Xbox, etc. The laptop screen can expand the viewing area and be more efficient when playing games, working, meeting and studying
  • [Plug and Play] The travel monitor for laptop provides 2 full-function Type-C ports and 1 HDMI port to connect most devices. Only one USB-C cable is needed to connect the external display to computer, and it supports power pass-through reverse charging. Note: Your device should support Thunderbolt 3.0/4.0 or USB 3.1 Type-C DP ALT-MODE. If not, you can connect via HDMI and power cable(NOT INCLUDE IN THE PACKAGE)
  • [IPS FHD USB C Monitor] 15.6 inch portable screen with a resolution of 1920*1080P, made of A+ IPS screen, supports 178° full viewing angle, can present accurate and vivid colors. Combined with HDR, images and videos present realistic colors and amazing details. Low blue light can effectively reduce blue light radiation damage, no flicker, eye protection, making it easier for you to work and perform multiple tasks at the same time
  • [Versatile Cover and Stand] Equipped with a scratch-resistant smart protective cover made of durable PU leather, it can also be used as a stand when working. Two grooves are used to adjust the angle and fix the external monitor. It can also provide all-round protection for the 1080p monitor when going out or traveling, suitable for putting in a backpack to avoid squeezing. Optional landscape and portrait modes, save more desktop space
  • [Worry-free Purchase] Since the output power of each device is different, the screen may flicker or restart. You can power the laptop monitor to solve it. Provide a 30-day return policy and 18-month warranty (excluding external force damage). If you have any concerns, please let us know (displayed on the back of the monitor)

Previewing is different from responsive editing

View changes the width at which you look at the canvas. Responsive styles lets you edit supported block-style values for a particular viewport.

  1. Confirm that the site uses a block theme and WordPress 7.1 or newer.
  2. Select a block and open its Settings; the styles panel shows only values that support responsive editing.
  3. With Responsive styles enabled, switch to Tablet or Mobile and edit the supported value. A viewport badge identifies the device state being changed.
  4. Return to Default or Desktop to verify that the base style still looks right.

An administrator can disable responsive-style editing; existing viewport styles continue to display according to the documentation. Not every block setting, theme, or third-party editor supports separate values. See Responsive styles for the documented scope.

Rank #4
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KYY Portable Monitor 15.6" 1080P Computer Monitor Screen Extender w/Cover
  • [ FHD 1080P PORTABLE MONITOR ]: KYY using a 15.6''(8.8"x14.2") advanced IPS screen with 178° wide viewing angle, Delivers 1920*1080 breathtaking viewing quality and HDR technology, KYY portable gaming monitor has excellent color rendering ability, provide you the clearer, smooth, excellent performance in gaming/multimedia. It can effectively reduce blue light radiation damage, no flickering, eye-care, and make it easier to watch for a long time
  • [ WIDE COMPATIBILITY ]: KYY portable monitor for laptop equipped with 2 Full Function Type-C ports and Mini-HDMI port, easy access to your favorite devices with 1 cable solution as long as your device support Thunderbolt 3 or 3.1 USB-Type-C, compatible with most laptop, smartphone, PC, PS4, XBOX and more.
  • [ ULTRA-SLIM PORTABLE DISPLAY ]: KYY USB C portable monitor features a 0.3inch ultra-slim profile(1.7lb), it is easy to slides into your bag, allows you to carry it everywhere, ideal for a simple on-the-go dual-monitor setup or extend your phone screen for movies or games. No driver needed and equipped with 3.5mm audio inputs and 2 built-in stereo speakers to enhance entertainment experience
  • [ DURABLE SMART COVER ]: Comes with a scratch-proof smart cover made of durable PU leather exterior, doubles as a stand, provides comprehensive protection and frameless magnetic design for this portable computer monitor. There are two grooves in the cover base to give at least some choice of viewing angle for your comfort for less cumbersome installation
  • [ LIGHTWEIGHT BUT POWERFUL ]: KYY portable external monitor can work in both landscape and portrait mode, can be used as a gaming monitor, screen extender for laptop or phone. It has a unique designed Premium gray metal appearance, 2 built-in speakers to play audio, a friendly menu control wheel for setting, and 24/7 professional support team

What each checking method can and cannot tell you

Check Best for Limitation
Editor Mobile preset Fast feedback while editing a page, post, template, or site It is an editor canvas; the front end still needs a separate check
Resizable editor canvas Widths between Desktop, Tablet, and Mobile presets It remains a canvas preview, not the independently rendered page
Front-end tab with browser responsive view Rendered output across many viewport widths It does not establish how every physical device behaves
Actual mobile device Practical check of the live page on a phone or tablet Requires access to a device; no specific model or minimum device list is prescribed
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Support on Ko-Fi

Troubleshoot common mobile-preview problems

There is no Responsive styles option

The documented prerequisites are a block theme and WordPress 7.1 or later. An administrator may also have turned off responsive-style editing. The View menu’s Mobile preview does not depend on having Responsive styles.

The editor canvas and live page do not match

Open Preview in new tab or View site, then inspect the current saved or published page in the browser. Check the complete template, not only the content area, and use a real device when feasible.

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Best Value
Sale
cocopar Portable Monitor 15.6 Inch 1080P FHD 60Hz 85% sRGB Travel Monitor with Speaker HDMI USB-C Second Screen for Laptop MacBook Surface PC Xbox PS4/5, VESA Mountable, with Cover Stand
  • Portable Monitor for Laptops: Cocopar laptop screen extender is the ideal portable monitor for Macbook, Surface Pro, Surface Laptop, Lenovo Laptop, HP Laptop, Dell Laptop, ASUS Laptop, etc. This second monitor for laptop supports Extend and Mirror Mode, bringing you efficiency for meetings, work from home, and presentations
  • Plug and Play USB-C Monitor: Cocopar portable laptop monitor provides 2 Full-featured USB-C ports and a HDMI port, is compatible with most laptops, PC, PS4, and Xbox. Only One single USB-C Cable is required for both power supply and display and supports power pass-through reverse charging. NOTE: Your device should support thunderbolt 3.0/4.0 or USB 3.1 Type C DP ALT-MODE
  • FHD Portable Monitor VESA Mountable: Featuring a 1080P resolution, 60 HZ, 85% color gamut, 178° FULL viewing angle, HDR, and Low Blue Light Super Clear IPS A-grade screen, this Cocopar 15.6 inch portable screen for laptop with two VESA holes can be easily and stably mounted on a stand for landscape and vertical mode for high productivity
  • Portable and Light Weight: Cocopar travel monitor for laptop is the ideal companion for all your business trips and home office. Measures only 4mm (0.2 inches) at the slimmest point and 1.5 lb without the magnetic cover (2.4 lb with cover). Coming with a Smart Stand Case, this travel monitor is well-protected and flexible to use anywhere you need a second screen for laptop
  • Your Go-To Screen Anywhere: Perfect for remote work, business trips, virtual meetings, gaming, and content creation. Cocopar delivers flexible dual-screen convenience wherever you are.

A developer suggests wp_is_mobile() for responsive layout

Do not use it as a viewport-width detector. The function classifies requests from the browser’s user-agent string, includes tablets in its mobile classification, and is not intended to detect screen width (WordPress Developer Resources: wp_is_mobile()). Responsive layout testing should use viewport widths and front-end rendering instead.

Someone refers to a separate “mobile version” of the site

WordPress.com Support says WordPress sites use responsive design and do not provide a separate mobile version to edit (Edit the mobile version of a WordPress site). A theme or plugin can add its own controls or behavior, so investigate those separately if the rendered page has custom mobile logic.

A practical verification sequence

  1. Use View > Mobile in the editor.
  2. Check Tablet and at least one intermediate width with the resize handles.
  3. Review header, navigation, content, and footer; enable Show template when you need the full template context.
  4. Open the front end with Preview in new tab or View site.
  5. Resize the browser or use device/responsive view to test more widths.
  6. Open the page on an available phone or tablet and test scrolling, menus, forms, links, and media.
  7. If a mobile-only design change is required, use Responsive styles only where the selected block exposes that capability, then recheck the default state.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.