# PageSpeedAudit

> Expert web-performance audits that put every PageSpeed Insights warning on trial. One URL, mobile + desktop, delivered in less than 24 hours for a $497 one-time fee: every flag adjudicated with quoted evidence, platform-native code fixes, an executive summary, machine-readable JSON, and 2 verification re-runs.

PageSpeedAudit turns a Lighthouse / PageSpeed score into a senior consultant's remediation plan. Every flag is adjudicated Real, Wrong, Trivial or Locked; both lab (Lighthouse) and field (Chrome UX Report) metrics are computed; and every surviving fix is predicted, proven and confirmed. This method is our coined "Noise & Silence" framework.

## Start here
- [The Noise & Silence framework](https://pagespeedaudit.com/framework): Our coined PageSpeed-audit method: every flag adjudicated Real / Wrong / Trivial / Locked, a Noise Rate and the Silent Bottleneck reported, every fix predicted, proven and confirmed.
- [How it works](https://pagespeedaudit.com/how-it-works): The methodology — Lighthouse plus Chrome real-user data, evidence from your actual page, impact-vs-effort prioritization, verification re-runs. Pages behind a login are measured signed in (test account or session cookie).
- [Pricing](https://pagespeedaudit.com/pricing): $497 one-time, per URL. Every PageSpeed Insights flag adjudicated — Real, Wrong, Trivial or Locked — plus the Silent Bottleneck, platform-native fixes, a cost-and-owner ledger of third-party tags, and 2 verification re-runs. Public pages or pages behind a login.
- [When to use this audit — and when not to](https://pagespeedaudit.com/compare): Honest comparison of the four ways to fix page speed: DIY with free tools, a monitoring subscription, a human consulting engagement, and this audit — including when each of the others is the better choice.

## Free tools
- [Speed to Revenue calculator](https://pagespeedaudit.com/tools/speed-revenue-calculator): Field-grounded estimate of what a faster page is worth in revenue, anchored to real-user CrUX data.
- [Performance budget calculator](https://pagespeedaudit.com/tools/performance-budget-calculator): Turn an LCP target and connection profile into per-resource byte budgets; exports a Lighthouse budget.json.
- [PageSpeed cloaking test](https://pagespeedaudit.com/tools/pagespeed-cloaking-test): Detect whether a site shows Google's PageSpeed a faster page than real visitors get.
- [Lighthouse sample-size calculator](https://pagespeedaudit.com/tools/lighthouse-sample-size): How many Lighthouse runs you need to prove a before/after change at 95% confidence and 80% power.
- [All free tools](https://pagespeedaudit.com/tools): Index of the free, no-email-gate performance tools.

## Research
- [Research index](https://pagespeedaudit.com/research): Open, reproducible web-performance research: controlled Lighthouse experiments and published datasets, no paywall.
- [The cost of a millisecond](https://pagespeedaudit.com/research/the-cost-of-a-millisecond): Evidence audit of the pagespeed-to-revenue literature (2006-2026), graded by research design.
- [The cost of a kilobyte](https://pagespeedaudit.com/research/the-cost-of-a-kilobyte): 210 controlled Lighthouse runs measuring what 100 KB costs your LCP.
- [Do Lighthouse savings materialize?](https://pagespeedaudit.com/research/do-lighthouse-savings-materialize): Do Lighthouse's predicted savings show up when you apply the fix? A controlled pilot and a registered web-scale protocol.
- [Did the web get faster?](https://pagespeedaudit.com/research/did-the-web-get-faster): How much of the CrUX Core Web Vitals gain is real optimization versus measurement change.
- [How many sites cheat PageSpeed?](https://pagespeedaudit.com/research/how-many-sites-cheat-pagespeed): How common is PageSpeed cloaking? A user-agent-flip pilot across the Tranco top 2,000 plus a census protocol.
- [Do WordPress speed plugins work?](https://pagespeedaudit.com/research/do-wordpress-speed-plugins-work): Do WP Rocket, NitroPack, LiteSpeed Cache and delay-JS improve real-user CWV, or just the Lighthouse score?
- [Do soft navigations repay the first load?](https://pagespeedaudit.com/research/do-soft-navigations-repay-the-first-load): The break-even math for SPAs trading a heavier first load for faster in-app navigations.
- [How many Lighthouse runs prove a change?](https://pagespeedaudit.com/research/how-many-lighthouse-runs-prove-a-change): The confidence-interval and statistical-power framework for proving a small Lighthouse change is real.
- [When does lab predict field?](https://pagespeedaudit.com/research/when-does-lab-predict-field): When a high Lighthouse score does, and does not, predict a Core Web Vitals pass.
- [Earlier paint or less work?](https://pagespeedaudit.com/research/earlier-paint-or-less-work): Distinguishing real INP work-reduction from merely repainting sooner.

## For developers and agents
- [Developer portal](https://pagespeedaudit.com/docs): Quickstart, the entitlement lifecycle, purchasing routes, the findings schema with a sample and typed definitions, scopes, and contextual guides. With an API key you can order audits, start each audit and its re-runs, and download the report and its JSON findings.
- [API reference](https://pagespeedaudit.com/docs/reference): Interactive OpenAPI reference with a request console (production). POST /orders defaults to a dry run.
- [Error catalog](https://pagespeedaudit.com/docs/errors): Every machine-readable error code, its status and its recovery; every problem response's type links here.
- [API changelog](https://pagespeedaudit.com/docs/changelog): Dated, additive changes to the v1 contract, the versioning policy and live operational status.
- [Findings schema](https://pagespeedaudit.com/docs/findings.schema.json): JSON Schema of the pagespeed-audit/findings@1 document the API returns; sample at /docs/sample.findings.json.
- [OpenAPI document](https://pagespeedaudit.com/openapi/v1.json): Machine-readable OpenAPI description (also linked from /.well-known/api-catalog).

## Optional
- [White-label / Reseller](https://pagespeedaudit.com/white-label): Agencies: resell code-level PageSpeed audits under your own brand at 40% off wholesale.
- [Affiliate program](https://pagespeedaudit.com/affiliates): Earn commission referring customers.
- [Newsletter](https://pagespeedaudit.com/newsletter): One email a month on web performance: adjudications worth generalising, new research, and Core Web Vitals metric changes. Double opt-in.
- [Contact](https://pagespeedaudit.com/contact): Questions about your audit or the API — we reply within one business day.