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Warm your CDN.
Before visitors arrive.

Preload your CDN cache so visitors can get your pages faster.
Warm important URLs, confirm cache hits, and see the difference in response time.

Get my free cache report Explore the dashboard
Free account · No credit card · Works with any CDN
FITS YOUR EXISTING STACK
Any CDN W WordPress Any public website
Warm. Verify. Repeat.
Warming reportILLUSTRATIVE EXAMPLE
yourwebsite.comPublic pages · London probe
Completed
Confirmed hits98% 98 of 100 checked pages
Median response headers84msObserved after verification
728 ms less waiting812 → 84 ms response headers · illustrative comparison
800 ms400 ms0 ms
First observationAfter warming
/MISSHIT
/articles/a-better-first-visitMISSHIT
/aboutHITHIT
Measured results. Clear cache evidence.
A clear picture of your cache. Before and after.
Public HTTPS warming works with any CDN
CloudflareAkamaiand more

Warm eligible public pages through your existing CDN. We confirm hits when its response headers expose cache status.

TAKE PRELOADING TO THE EDGE

Your server cache is ready.
What about your CDN?

Your preload plugin can prepare pages on your server. Your CDN has its own cache, which can still be empty after a purge, a new publication, or expiry. CacheCharger helps prepare that next layer.

01 · ORIGIN CACHE

Your existing preload

Prepares HTML on your server.

02 · CDN EDGE CACHE

CacheCharger

Your public pages. Prepared at the edge.

  • Ready before the first visitWarm important URLs ahead of demand.
  • Cache hits you can verifySee the evidence in your CDN headers.
  • A measurable faster startCompare response times where evidence matches.
LESS WAITING. MORE OPPORTUNITY.

Better speed.
Better business potential.

More conversions. Stronger revenue. Fewer visitors leaving. Published performance studies show why it is worth making every first response count.

RAKUTEN 24 · A/B TEST+33.13%conversion rate

The performance-optimised version also delivered 53.37% more revenue per visitor.

Read the study
SWAPPIE · PERFORMANCE PROJECT+42%mobile revenue

After a three-month project that reduced average load time by 23%.

Read the study
ECONOMIC TIMES · TOPIC PAGES−50%bounce rate

With nearly fourfold better INP, alongside 43% more pageviews.

Read the study

The evidence, with the context.

Nine published studies covering sales, revenue, bounce, order value and engagement.

9 studies

Vodafone

A/B test · 2021
PERFORMANCE CHANGE

31% better Largest Contentful Paint (LCP).

REPORTED BUSINESS RESULT

+8% sales · +15% lead-to-visit rate · +11% cart-to-visit rate.

Source

Rakuten 24

A/B test · 2022
PERFORMANCE CHANGE

Core Web Vitals work; mobile test page loaded 0.4 seconds earlier.

REPORTED BUSINESS RESULT

+33.13% conversions · +53.37% revenue per visitor · +15.20% average order value · −35.12% exit rate.

Source

Swappie

Before / after · 2021
PERFORMANCE CHANGE

23% lower average load time and 55% better LCP over a three-month performance project.

REPORTED BUSINESS RESULT

+42% mobile revenue. Mobile-to-desktop conversion ratio rose from 24% to 34% (10 percentage points).

Source

Renault

Field-data regression · 2021
PERFORMANCE CHANGE

Compared LCP with conversion and bounce across its landing-page data.

REPORTED BUSINESS RESULT

A 1-second LCP improvement was associated with +13% conversions around 1-second LCP; −14 percentage points in bounce below 1.6-second LCP, versus −5 points above it.

Source

The Economic Times

Performance project · 2023
PERFORMANCE CHANGE

Interaction to Next Paint (INP) improved nearly fourfold, alongside a migration to Next.js.

REPORTED BUSINESS RESULT

−50% bounce rate · +43% pageviews on topic pages.

Source

redBus

Performance project · 2023
PERFORMANCE CHANGE

Reduced interaction delays; one input-state optimisation improved page INP by 72%.

REPORTED BUSINESS RESULT

+7% overall sales after the wider INP improvement project.

Source

Terra

Prefetching A/B test · 2023
PERFORMANCE CHANGE

Browser article prefetching: LCP −51% mobile / −73% desktop; TTFB −83% / −84%.

REPORTED BUSINESS RESULT

Ad click-through rate +11% mobile / +30% desktop; ad viewability +10.5% / +6%. This tested browser prefetching, a separate technique from CDN warming.

Source

Deloitte / Google

Observational study · 2020
PERFORMANCE CHANGE

Observed a natural 0.1-second improvement in mobile site speed over four weeks.

REPORTED BUSINESS RESULT

Retail: +8.4% conversions and +9.2% average order value. Travel: +10.1% conversions. Luxury: +8.6% pageviews/session. Lead-gen information pages: 8.3% better bounce rate.

Source

Google mobile research

Predictive model · 2017
PERFORMANCE CHANGE

Compared mobile page-load times of 1 and 3 seconds.

REPORTED BUSINESS RESULT

32% higher predicted bounce probability at 3 seconds. A modelled relationship, not a measured CacheCharger uplift.

Source
Start with your own evidence. Inspect a URL, see which responses your CDN caches, then warm the pages that matter.Check my CDN cache

These are case-specific, company-reported results and research models—not CacheCharger results or a forecast. The projects improved broader page performance; CDN warming is one part of that picture. CacheCharger measures response-header time and cache evidence, not full page-load speed or revenue.

YOUR FIRST USEFUL ANSWER, FREE

Is your cache ready
for the next visitor?

Connect a website you own and start with its important public pages. Your first report shows confirmed hits, observed waiting time, and the pages that need attention.

Get my free cache report No card. No CDN API key. Ownership verification required.
  1. 01
    Connect & verify

    Use DNS, a verification file, or the WordPress connector.

  2. 02
    Check your public pages

    Choose URLs or import a sitemap. Sensitive pages stay excluded.

  3. 03
    See the evidence

    Before and after observations, with clear next steps.

01Preload CDN cache

Before your visitors arrive.

02Verify the result

A download isn’t proof of a hit.

03Keep it healthy

Catch changes that need attention.

SMALL SETUP. LASTING USEFULNESS.

From cold pages
to clear answers.

Your CDN cache warmer should do more than visit URLs.
It should tell you whether those visits helped.

01

Connect your website

Verify ownership, then discover your public pages from a sitemap or add the URLs that matter.

02

Warm and verify

We request eligible public pages through your CDN, verify cache headers, and report before-and-after response times where comparable.

03

Stay a step ahead

Set a schedule, connect WordPress updates, and review the pages that need a closer look.

PAGE DIAGNOSTIC/articles/your-latest-post
BYPASS

More visits won’t
fix a bypass.

This response is bypassing the cache.
Review its cache directives and cookies.

Response evidencecf-cache-status: BYPASS
cache-control: private
Illustrative diagnostic
EVIDENCE, NOT GUESSWORK

Understand the
pages that stay cold.

A green “crawl complete” message only tells half the story. CacheCharger separates confirmed hits from uncached, blocked, and unsuccessful requests.

  • Cache status and response headers
  • Location evidence for each observation
  • Useful guidance when caching fails
  • CSV reports you can inspect and share
How we measure results
A LIGHTER WAY TO STAY WARM

Give your cache
a little foresight.

Start with the pages that matter. Warm on a schedule or after published content changes, with sensible limits that protect your origin.

Meet the WordPress connector
W
You publish an updateWordPress sends the affected URLs
EVENT
Updates join one queueRepeated edits are coalesced
QUEUE
Public pages are verifiedResults are ready in your dashboard
RESULT
A FEW GOOD QUESTIONS

Clear from
the start.

Read the documentation

We request your public pages, then check the CDN’s response headers for a confirmed HIT. Eligible misses get up to two follow-up checks. If a page stays uncached, is blocked, or bypasses the cache, the report explains what needs attention. We stop there rather than repeatedly hitting your server. Cache rules, expiry and CDN location still determine which visitors receive a HIT.

READY BEFORE THEY ARRIVE

Your next visitor
deserves a warm welcome.

Get started for free

Free account. Three websites. 1,000 warming units per month.