Tip: If FreeSync/G-Sync is unavailable, you can try enabling traditional VSync, but it will introduce input latency. Adaptive sync is recommended for the best experience.
Free Online Screen Tearing Test · No Installation Required · Local Detection
Screen Tearing Test - Monitor Test
The screen tearing test tool is used to detect whether horizontal breaks, misalignment, or tearing appear in fast-moving images on the screen, helping determine the working status of monitor synchronization technologies (FreeSync / G-Sync / VSync). The tool provides four modes: stripe tracking, color block layering, checkerboard scrolling, and text scrolling, along with built-in sync effect comparison, allowing precise distinction between normal synchronization and tearing without sync, improving the accuracy of screen tearing testing. Start the screen tearing test now and determine your screen's sync performance in 10 seconds, completing your screen tearing verification.
💡Stripes continuous without breaks → VRR normal; horizontal break lines present → enable FreeSync / G-Sync
0 fps
50%
When tearing occurs, stripes misalign at the horizontal break line
Test Mode
ModeStripe Tracking
SpeedSlow
Background Black
Sync Effect Comparison
Compare VRR working properly vs. tearing without sync to help you identify screen tearing
VRR Normal
Tearing Without Sync
Learn More About Screen Tearing Test
Professional screen tearing detection and monitor sync test tool to help you quickly evaluate image integrity
What is a Screen Tearing Test? What Does Screen Tearing Mean?
Screen tearing test, also known as screen tearing test or monitor tearing detection, is a screen test tool that detects whether horizontal breaks, misalignment, or tearing occur in fast-moving images on a monitor through browser-based online testing. Many users ask what screen tearing means. Simply put, it occurs when the graphics card's output frame rate is not synchronized with the monitor's refresh rate, causing one frame to be overwritten by the next before it is fully displayed, resulting in the upper and lower parts of the screen showing content from different frames, creating one or more horizontal break lines. This tearing test tool helps users determine whether their monitor is working in the correct sync state through multiple test modes (stripe tracking, color block layering, checkerboard scrolling, text scrolling) and sync effect comparison. Through the screen tearing detection feature provided on this page, you can intuitively see the severity and type of tearing.
Unlike other screen test software that requires installation, this screen tearing test is entirely based on native browser rendering and animation APIs, requiring no download or plugin installation. After opening the page, simply click start to perform screen tearing detection, supporting multiple test modes, multiple speed levels, background switching, and sync effect comparison — making it the ideal choice for quickly verifying monitor sync performance. It is recommended to test in different modes and speeds to obtain more comprehensive screen tearing test data.
Why Perform a Screen Tearing Test? How Much Tearing is Normal?
Screen tearing directly affects the visual experience in gaming and video playback. If monitor sync settings are improper (such as FreeSync/G-Sync or VSync not enabled), screen tearing will occur frequently. Through monitor testing and tearing testing, these issues can be quickly identified, which is also the significance of regular screen testing. How much screen tearing is normal? Ideally, after enabling adaptive sync technology, there should be no tearing at all; if sync is not enabled, tearing can be very obvious. Therefore, regularly conducting screen tearing detection helps promptly identify sync issues.
This screen tearing test tool can quantify monitor sync performance: multiple test modes, speed levels, and sync comparison can objectively reflect the tearing stability of the monitor. If the test results show obvious tearing, it is recommended to check whether FreeSync/G-Sync is enabled or try enabling VSync; if the test is normal, it indicates that the monitor is working in optimal sync state. Regularly performing screen tearing tests ensures your monitor always remains in optimal display condition.
VRR Range Reference and Sync Technology Selection
📊 VRR Range Reference
- G-Sync Ultimate1-360 Hz
- High-End FreeSync48-240 Hz
- Standard FreeSync48-144 Hz
- Basic FreeSync48-60 Hz
How to Understand VRR Range?
VRR (Variable Refresh Rate) allows the monitor to dynamically match the graphics card's frame rate. G-Sync Ultimate has the widest range (1-360Hz), eliminating tearing even at low frame rates; high-end FreeSync (48-240Hz) covers mainstream high refresh rates; basic FreeSync (48-60Hz) is only suitable for entry-level use. When below the VRR minimum range, LFC (Low Framerate Compensation) resolves the issue through frame multiplication; when exceeding the maximum range, it falls back to a no-sync state, which may cause tearing.
⚙️ Sync Technology Selection Recommendations
- FreeSync / G-SyncNo tearing, no additional latency, best solutionHighly Recommended
- Fast Sync / Enhanced SyncNo tearing, latency lower than VSyncRecommended
- VSync (Vertical Sync)No tearing but adds about one frame of latencyUse with Caution
- No SyncLowest latency but obvious tearingCompetitive Gaming
How to Choose a Sync Solution?
- Enable FreeSync / G-Sync in both the graphics driver and monitor OSD — this is the best solution.
- If VRR is unavailable, try Fast Sync / Enhanced Sync.
- Traditional VSync adds latency; use with caution in competitive gaming.
💡 Ideal Configuration:VRR enabled + frame rate capped at (refresh rate - 3), e.g., 144Hz → 141fps.
How to Use the Screen Tearing Test Tool
1
Select Test Mode
After opening the page, select a preset scenario (FPS gaming/video/office) in the top scene selector, or manually switch between stripe tracking, color block layering, checkerboard scrolling, text scrolling modes in the right panel. No software installation is needed; the tool will start the animation immediately.
2
Observe Tearing
Observe whether horizontal break lines or misalignment appear in the moving pattern. You can switch between different speed levels (slow/medium/fast) and background colors (black/gray/white) for a more comprehensive tearing assessment. Press Space to pause and observe the current frame at any time.
3
Compare Sync Effects
The right panel provides sync effect comparison, comparing "VRR normal" vs. "no sync tearing." If your monitor shows similar tearing lines, it indicates adaptive sync is not enabled or incorrectly configured; if the image is smooth, it means sync technology is working properly.
How to Enable FreeSync / G-Sync to Eliminate Screen Tearing
Three steps to configure sync technology and say goodbye to screen tearing
1
Check Monitor and Graphics Card Support
Confirm that your monitor supports FreeSync (AMD) or G-Sync (NVIDIA), and is connected via DP/HDMI. Some monitors require manually enabling adaptive sync in the OSD menu.
2
Enable in Driver Panel
Open the NVIDIA Control Panel or AMD Radeon Software, find the G-Sync / FreeSync option and enable it. Also ensure that adaptive sync in the monitor OSD is turned on.
3
Run This Tool to Verify
Return to this tearing test tool and retest. If the image no longer shows break lines, sync technology is working; if tearing persists, check whether the frame rate exceeds the monitor's refresh rate range, or try capping the in-game frame rate.
Screen Tearing Test Basics
1. What is Screen Tearing? Screen tearing refers to horizontal break lines that appear when the graphics card's output frame rate is out of sync with the monitor's refresh rate, causing the monitor to display content from two or more frames within a single frame. The more obvious the tearing, the less smooth the dynamic image.
2. Common Sync Technologies: VSync (Vertical Sync, locks frame rate to refresh rate, adds input latency); FreeSync (AMD adaptive sync, dynamically adjusts refresh rate); G-Sync (NVIDIA adaptive sync, hardware module or compatible mode); Fast Sync (NVIDIA's lower-latency alternative).
3. How to Distinguish Tearing from Stuttering? Tearing appears as horizontal break lines where the upper and lower parts of the image are discontinuous; stuttering is the pausing effect caused by low frame rates or unstable frame intervals. This tool clearly exposes tearing through high-speed moving patterns.
4. Relationship Between Frame Rate and Refresh Rate: When frame rate and refresh rate are inconsistent, the probability of tearing increases. After enabling adaptive sync, frame rate can dynamically match refresh rate, eliminating tearing.
5. Which Monitors Need Tearing Testing Most? High refresh rate gaming monitors, monitors supporting FreeSync/G-Sync, and regular monitors without sync technology enabled are all recommended to undergo screen tearing testing. Newly purchased monitors should be tested as soon as possible.
6. Daily Maintenance Recommendations: Keep graphics drivers updated, ensure high-quality DP/HDMI cables are used, and reasonably set frame rate caps in games (typically refresh rate -3) to reduce tearing.
Monitor Types Supported for Screen Tearing Testing
Covers mainstream monitor panel types — tearing detection works on any screen
OLED MonitorSelf-emissive / Response <0.1ms
TN Panel MonitorEsports / Response 1-4ms
IPS Panel MonitorAccurate Colors / Response 3-8ms
VA Panel MonitorHigh Contrast / Response 5-40ms
Fast IPS MonitorHigh-Speed IPS / Response 1-4ms
Mini-LED MonitorLocal Dimming / Response 3-8ms
Laptop ScreenBuilt-in Panel / Various Types
External Portable MonitorUSB-C / Various Panels
Featured Screen Tearing Test Articles
From beginner to advanced, master monitor sync and optimization
Screen Tearing Detection Basics: How to Test Screen Tearing OnlineDetailed explanation of screen tearing phenomenon, using TestUFO and online detection tools to observe tear lines, teaching you to determine if a monitor has screen tearing issues through moving vertical bars and high-speed scrolling images.What Causes Screen Tearing? In-Depth Analysis of Frame Rate and Refresh Rate MismatchExplaining the causes of screen tearing: graphics card output frame rate not synchronized with monitor refresh rate, analyzing the role and latency cost of V-Sync, and confirming whether issues are resolved through screen tearing detection.How G-Sync and FreeSync Eliminate Screen Tearing? Detection and Setup GuideComparing the principles and effects of G-Sync, FreeSync, and V-Sync anti-tearing technologies, guiding how to enable adaptive sync in drivers, and using screen tearing detection tools to verify differences before and after enabling.Screen Tearing Detection Tool Recommendations: From Online Tests to In-Game BenchmarksCompilation of common screen tearing detection methods: TestUFO tearing test, built-in game benchmarks, frame-by-frame recording analysis, teaching you how to accurately determine if a monitor has screen tearing and its severity.
Core Advantages of This Screen Tearing Test Website
Four Test Modes
Stripe tracking, color block layering, checkerboard scrolling, and text scrolling for multi-dimensional tearing detection across different scenarios.
Three Speed Levels
Slow/medium/fast to simulate office, video, and gaming scenarios, accurately reflecting tearing performance at different refresh rates.
Multiple Background Colors
Switchable black/gray/white backgrounds to help identify tearing differences at different contrast levels.
Sync Effect Comparison
Compare VRR normal vs. no-sync tearing to help determine whether sync technology is working.
Keyboard Shortcuts
Arrow keys to switch modes and backgrounds, Space to pause and observe, F for fullscreen — efficient and convenient operation.
Diagnostic Wizard
Built-in step-by-step diagnostic wizard to guide you through troubleshooting tearing causes and correctly configuring sync.
Why Choose Online Screen Tearing Test?
Detection Method
Desktop SoftwareRequires downloading dedicated software; some tools require payment or bundle ads, and cannot display tearing effects in real time.
This ToolOnline real-time rendering of moving patterns with automatic tearing detection and pause observation support.
Test Precision
Desktop SoftwareSingle sampling mode cannot cover tearing performance at different speeds and backgrounds.
This ToolFour modes × three speeds × three backgrounds, comprehensively covering various tearing scenarios.
Ease of Use
Desktop SoftwareCumbersome software installation; some tools do not support high refresh rate monitors or require administrator privileges.
This ToolOpen the webpage and use immediately — free, ad-free, no registration required, supports all standard display devices.
Sync Guidance
Desktop SoftwareNo sync effect comparison; users cannot determine whether FreeSync/G-Sync is working.
This ToolProvides sync effect comparison and diagnostic wizard to help users configure settings precisely.
Reference Value
Desktop SoftwareOnly displays basic animations, lacking panel type references and sync technology explanations.
This ToolProvides sync technology knowledge, panel type references, and tearing judgment criteria.
Screen Tearing Test FAQ
Does the screen tearing test require software installation? How to perform screen tearing detection online?
Not at all. This is a pure web-based screen tearing test tool built on native browser rendering APIs. Simply open the page to perform screen tearing testing. All calculations are done locally with no data uploaded. It also supports sync effect comparison, displaying tearing effects in real time.
How to test for screen tearing? What methods are available for screen tearing testing?
Click "Start Test" and observe whether horizontal break lines appear in the moving pattern. The tool provides four modes: stripe tracking, color block layering, checkerboard scrolling, and text scrolling. It is recommended to test at different speeds and backgrounds for a more comprehensive tearing assessment. Press Space to pause and observe the current frame.
What is the relationship between screen tearing and frame rate? How to eliminate tearing?
Screen tearing typically occurs when the graphics card's output frame rate is inconsistent with the monitor's refresh rate. Solutions include: enabling FreeSync / G-Sync adaptive sync, enabling VSync (which adds input latency), or capping game frame rate to match the refresh rate. This tool helps you verify whether sync is working.
Why is my monitor tearing so obviously? How to perform screen tearing detection?
Possible reasons include: FreeSync/G-Sync not enabled, monitor not supporting adaptive sync, outdated graphics drivers, poor-quality cables, or game frame rate far exceeding the refresh rate. It is recommended to check sync settings and retry screen tearing detection after enabling or adjusting them.
Can OLED, IPS, VA, and TN monitors all use this tool for tearing testing?
Yes. As long as the monitor can display web content normally, regardless of panel type — OLED, IPS, VA, or TN — you can use this screen tearing test tool for screen tearing detection. Laptop screens, external monitors, and even tablet screens can all be tested.
How to interpret test results? How much screen tearing is normal?
Criteria: No break lines = excellent (sync technology working); Minor but infrequent tearing = acceptable; Obvious and persistent tearing = abnormal (sync not enabled or misconfigured). After enabling adaptive sync, there should be no tearing at all.
Suspect Your Monitor Has Screen Tearing? Start Screen Tearing Test Now
Free online screen tearing test with multiple modes to detect screen sync status and generate a tearing assessment report.
Popular Tests: Screen Tearing Test · Dead Pixel Detection · Monitor Refresh Rate Test · Screen Color Test · Screen Flicker Test