LightTest
LightTest compares website loading performance frame by frame on a shared timeline.
About LightTest
LightTest, accessible at https://lightest.app/, is a web-based developer tool built to visualize website loading performance. It compares how different web pages load side by side, breaking down the loading process frame by frame and displaying all results on a single shared timeline to highlight speed differences clearly.
The tool is aimed at web developers, performance engineers, and site owners who need to identify loading bottlenecks, test the impact of site optimizations, or compare the performance of their own sites against competitors. It runs entirely in the browser with no required downloads or installations, making it suitable for quick performance checks during development, pre-launch audits, or ongoing site monitoring.
Key features
- Compares website loading performance side by side
- Displays loading progress frame by frame
- Shows all results on a shared timeline
- Runs entirely in a web browser, no installation needed
Best for: It is best suited for web developers, performance engineers, and site owners who need to compare and analyze website loading speeds.
Good for
- Frame-by-frame breakdown makes loading differences easy to identify
- No software installation required, runs fully in the browser
- Side-by-side comparison simplifies testing between multiple sites
LightTest at a glance
- Website
- lightest.app
- Category
- Development › Developer Tools
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Developer Tools
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Open source
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LightTest FAQ
What is LightTest used for?
LightTest is a web-based tool that compares the loading performance of different websites side by side, with frame-by-frame breakdowns on a shared timeline.
Do I need to install software to use LightTest?
No, LightTest runs entirely in your web browser with no downloads or installations required.
Who is LightTest designed for?
LightTest is intended for web developers, performance engineers, and site owners who need to analyze and compare website loading speeds.
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