Page Speed Checklist
Free page speed checklist: audit your site against Core Web Vitals targets (LCP, INP, CLS) with pass criteria and fixes for each check. No signup.
Page Speed Checklist
Enter what you want checked below, hit Check, and get a clear pass / warning / fail verdict for every item.
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What is Page speed checklist?
Page Speed Checklist — Free page speed checklist: audit your site against Core Web Vitals targets (LCP, INP, CLS) with pass criteria and fixes for each check. No signup.
Every check, threshold and fix comes from the vendored addyosmani/web-quality-skills Core Web Vitals checklist (MIT) — the metric bands (LCP ≤2.5s / 200ms INP / 0.1 CLS at p75), the 8-item LCP checklist, the INP/CLS diagnosis guidance, the measure-before-optimizing workflow and the framework quick fixes are that data, structured for the tool; nothing is invented here. Be honest about what this is: an audit guide, not a live Lighthouse or PageSpeed scan — it cannot measure your page, so each row tells you how to verify the pass criterion yourself. Site type and framework only label the audit and select the matching framework fixes; the core checks apply to every site.
Why use this page speed checklist?
Built for page speed checklist
Free page speed checklist: audit your site against Core Web Vitals targets (LCP, INP, CLS) with pass criteria and fixes for each check. No signup.
Transparent & honest
This is an audit guide, not a measurement — it cannot scan your page; verify every “Pass if” with CrUX field data or a DevTools trace.
Private by design
Everything runs in your browser. Your inputs never leave your device.
Works everywhere
Fully responsive — perfect on desktop, tablet, and mobile. No app needed.
Regularly updated
Regularly maintained and reviewed to ensure accuracy.
Free forever
No accounts, no limits, no watermarks. Use Page Speed Checklist as much as you need.
How to use Page Speed Checklist
- 1Pick your Site type and Framework, and optionally paste the Page URL you want to audit.
- 2Run the tool to get your Core Web Vitals targets and the full audit checklist.
- 3Read the targets table: LCP ≤ 2.5s, INP ≤ 200ms, CLS ≤ 0.1 — measured at the 75th percentile of real visits.
- 4Work through each checklist row: verify its “Pass if” criterion with CrUX field data or a DevTools trace, then apply the fix.
- 5Re-run your lab measurement after each fix — field data needs new user visits before it improves.
What can you do with Page Speed Checklist?
- Core web vitals checklist — Free page speed checklist: audit your site against Core Web Vitals targets (LCP, INP, CLS) with pass criteria and fixes for each check.
- Website speed checklist — Free page speed checklist: audit your site against Core Web Vitals targets (LCP, INP, CLS) with pass criteria and fixes for each check.
- Page speed audit — Free page speed checklist: audit your site against Core Web Vitals targets (LCP, INP, CLS) with pass criteria and fixes for each check.
- Lcp inp cls explained — Free page speed checklist: audit your site against Core Web Vitals targets (LCP, INP, CLS) with pass criteria and fixes for each check.
- How to improve page speed — Free page speed checklist: audit your site against Core Web Vitals targets (LCP, INP, CLS) with pass criteria and fixes for each check.
Good to know
- This is an audit guide, not a measurement — it cannot scan your page; verify every “Pass if” with CrUX field data or a DevTools trace.
- Thresholds are Google’s public Core Web Vitals bands at the 75th percentile; passing them is the target, not a ranking guarantee.
- Framework quick fixes apply to that stack only; the 16 core checks apply to every site type.
- Speculation Rules prerendering is Chromium-only progressive enhancement with real bandwidth cost — measure before expanding it.
How it works
Every check, threshold and fix comes from the vendored addyosmani/web-quality-skills Core Web Vitals checklist (MIT) — the metric bands (LCP ≤2.5s / 200ms INP / 0.1 CLS at p75), the 8-item LCP checklist, the INP/CLS diagnosis guidance, the measure-before-optimizing workflow and the framework quick fixes are that data, structured for the tool; nothing is invented here. Be honest about what this is: an audit guide, not a live Lighthouse or PageSpeed scan — it cannot measure your page, so each row tells you how to verify the pass criterion yourself. Site type and framework only label the audit and select the matching framework fixes; the core checks apply to every site.
Examples
19 checks: 16 core + 3 Next.js quick fixes; targets LCP ≤2.5s, INP ≤200ms, CLS ≤0.1 at p75.
16 core checks, no framework rows — every check still applies.
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