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Website Performance Tools

Explore 12 free Website performance tools for response timing, compression, caching, resources, redirects and page-weight checks. The collection is organized for website owners, developers and performance practitioners and focuses on identifying practical performance issues without paid monitoring APIs.

What you can do with Website Performance tools

Website owners, developers and performance practitioners can use these tools from their dedicated pages. Each tool includes its purpose, instructions, result guidance and links to closely related utilities.

Choose a tool by name or filter the category. For calculations, verify units and assumptions before relying on the result. For text, document, web and diagnostic tools, review generated output before using it in production, publication or formal decisions.

12 free toolsDedicated pagesMobile friendlyNo registration required
Browse by level
Levels are discovery guides, not formal academic classifications.

Calculators & Analysis

2 tools
Website PerformanceBasic

Page Performance Analyzer

Page Performance Analyzer for the webpage or URL you enter.

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Website PerformanceBasic

Redirect Chain Analyzer

Redirect Chain Analyzer for the webpage or URL you enter.

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Checks & Diagnostics

10 tools
Website PerformanceBasic

Cache Header Checker

Cache Header Checker for the webpage or URL you enter.

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Website PerformanceBasic

HTTP Compression Checker

HTTP Compression Checker for the webpage or URL you enter.

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Website PerformanceAdvanced

DOM Complexity Checker

DOM Complexity Checker for the webpage or URL you enter.

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Website PerformanceBasic

Performance Header Inspector

Performance Header Inspector for the webpage or URL you enter.

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Website PerformanceBasic

Image Performance Audit

Image Performance Audit for the webpage or URL you enter.

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Website PerformanceBasic

HTML Transfer Size Checker

HTML Transfer Size Checker for the webpage or URL you enter.

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Website PerformanceBasic

Resource Count Audit

Resource Count Audit for the webpage or URL you enter.

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Website PerformanceBasic

Script & Stylesheet Audit

Script & Stylesheet Audit for the webpage or URL you enter.

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Website PerformanceBasic

Third-party Domain Audit

Third-party Domain Audit for the webpage or URL you enter.

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Website PerformanceBasic

TTFB Checker

TTFB Checker for the webpage or URL you enter.

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