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ExplainDev VS warmup.rocks

Compare ExplainDev VS warmup.rocks and see what are their differences

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ExplainDev logo ExplainDev

Meet the AI-powered browser extension that explains code using plain language.

warmup.rocks logo warmup.rocks

warmup.rocks keeps your CDN cache warm in every edge location worldwide: Cloudflare, Fastly, Akamai, CloudFront and more. Warming from 42 countries, hit-ratio analytics.
Visit Website
  • ExplainDev Landing page
    Landing page //
    2023-05-09
  • warmup.rocks Homepage
    Homepage //
    2026-07-18
  • warmup.rocks Dashboard
    Dashboard //
    2026-07-18

A CDN isn't one cache. It's hundreds of independent ones, and most of them are cold.

Cloudflare alone runs 300+ data centers, and each keeps its own cache. A page cached in Frankfurt is still ice cold in Tokyo, so the first visitor per region pays the full origin round trip. In our measurement of 408,000 CDN requests, a cache miss was 3.5x slower than a hit at the median.

warmup.rocks fixes that by requesting your pages from 42 countries on 6 continents on a schedule. Each request enters the CDN network in a different region and fills the edge location it lands in: 90+ locations per warming pass.

What makes it different: verification. We record the cache status (cf-cache-status, x-cache and equivalents) of every single response and show you the hit ratio per edge location, per run. Warming without verification is hoping.

Features

  • Sitemap auto-discovery, nested sitemap indexes resolved before every run
  • CDN auto-detection: Cloudflare, Fastly, CloudFront, Akamai, bunny.net, CDN77
  • Scheduled runs every 1-3 hours depending on plan
  • Deploy hooks + official GitHub Action: re-warm right after your CI purges the cache
  • Mobile cache variant (second pass with a mobile user agent)
  • Email alerts when a WAF rule blocks warming runs

Free tools, no signup: multi-location cache checker and website speed test.

Nothing to install: no plugin, no DNS change. 7-day free trial, plans from $15/month.

ExplainDev

Website
explain.dev
Pricing URL
Official ExplainDev Pricing
$ Details
-
Platforms
-
Release Date
-
Edit details

warmup.rocks

Website
warmup.rocks
Pricing URL
Official warmup.rocks Pricing
$ Details
paid Free Trial $15 / Monthly (1 project, 100 pages per run, Warm every 3 hours)
Platforms
Web Wordpress WooCommerce Wix ReactJS
Release Date
2026 July
Startup details
Country
Switzerland
Founder(s)
Kevin Kyburz
Employees
1 - 9
Edit details

ExplainDev features and specs

  • Improved Code Understanding
    ExplainDev provides detailed explanations of code snippets, helping users understand how a specific piece of code works.
  • Facilitates Learning
    The tool is beneficial for new developers and students as it can accelerate the learning process by breaking down complex code into simpler terms.
  • Increased Productivity
    By offering quick insights into code, ExplainDev can save time for developers who need to work with unfamiliar codebases.
  • Integration with Development Tools
    ExplainDev can integrate with popular development environments, allowing users to access its features without leaving their coding platforms.

Possible disadvantages of ExplainDev

  • Dependency on Service
    Relying on ExplainDev for code understanding can lead to over-dependence, potentially hindering the development of independent problem-solving skills.
  • Accuracy Limitations
    The explanations provided may not always be accurate or fully comprehensive, especially for complex or niche code snippets.
  • Data Privacy Concerns
    Using an online tool to analyze code might raise concerns about the privacy and security of the code being processed.
  • Limited Programming Language Support
    The tool may not support all programming languages or frameworks, limiting its usefulness for developers working outside of its supported technologies.

warmup.rocks features and specs

  • Free Resource
    Warmup.rocks offers a collection of button hover effects and micro-interactions completely free of charge, making it accessible to developers and designers of all budgets.
  • Copy-Paste Code
    The site provides ready-to-use CSS and HTML code snippets that can be easily copied and implemented directly into projects, saving development time.
  • Visual Preview
    Users can see live previews of each animation effect before deciding to use it, allowing for quick visual assessment without needing to test code first.
  • Variety of Effects
    The collection includes numerous different button animation styles, giving developers multiple creative options to enhance user interface interactivity.
  • Lightweight Implementation
    The animations are typically built with pure CSS or minimal JavaScript, making them lightweight and easy to integrate without heavy dependencies.

Category Popularity

0-100% (relative to ExplainDev and warmup.rocks)

ExplainDev

warmup.rocks

Developer Tools
80 80%
Developer Tools
20% 20
CDN
0 0%
CDN
100% 100
Chrome Extensions
100 100%
Chrome Extensions
0% 0
Web Cache
0 0%
Web Cache
100% 100

Questions & Answers

As answered by people managing ExplainDev and warmup.rocks.

Who are some of the biggest customers of your product?

warmup.rocks's answer:

  • this:matters GmbH (the Swiss web agency behind the product, running client sites through it)

What makes your product unique?

warmup.rocks's answer:

Most cache warmers run from one server, so they only warm the one CDN edge location that server happens to hit. CDNs like Cloudflare cache per data center, 300+ of them, and a HIT in Frankfurt says nothing about Singapore.

warmup.rocks is different:

  • Warms from 42 countries on 6 continents, so the cache gets filled where your visitors actually are
  • Verifies every response (cf-cache-status, x-cache) instead of just firing requests and hoping
  • Shows hit ratio per edge location, so you see whether warming actually works
  • Nothing to install: no plugin, no script tag, no DNS change

Why should a person choose your product over its competitors?

warmup.rocks's answer:

Three reasons:

  • Geography. Competitors warm from a single region. We warm from 42 countries, which is the whole point of a CDN cache.
  • Verification. We read the cache status header of every single response and report the actual hit ratio per location, so you see whether warming works instead of taking it on faith.
  • Deploy integration. A deploy hook or our GitHub Action re-warms the cache right after you ship, which is exactly when it's coldest.

Plans start at $15/month with a 7-day free trial.

How would you describe the primary audience of your product?

warmup.rocks's answer:

Developers, agencies and store owners who run sites behind a CDN (Cloudflare, Fastly, CloudFront, Akamai, bunny.net) and serve visitors in more than one region. Typical cases:

  • WordPress/WooCommerce sites where preload plugins stop at the server cache
  • Shopify and Magento stores with a long product tail that never stays warm on its own
  • Anyone whose deploys purge the edge cache and leave the first visitor per location with a slow load

What's the story behind your product?

warmup.rocks's answer:

I run a web agency in Switzerland, and for years I believed our sites were fast because we put them behind Cloudflare and saw HIT in the headers. Then I measured from other continents: pages that loaded in milliseconds from Zurich took multiple seconds from Tokyo or Sรฃo Paulo, because each edge location keeps its own cache and most of them were cold.

I built a warmer for our own client sites first, then measured 408,000 CDN requests and found a miss is 3.5ร— slower than a hit at the median. That data convinced me this should be a product.

Which are the primary technologies used for building your product?

warmup.rocks's answer:

  • Node.js + TypeScript with Hono as the web framework
  • SQLite for storage
  • Astro for the public site, vanilla JavaScript for the dashboard
  • Warming requests go through dedicated datacenter proxies in 42 countries

The whole thing runs on a plain VPS behind Cloudflare, which keeps it fast and cheap without a pile of infrastructure.

User comments

Share your experience with using ExplainDev and warmup.rocks. For example, how are they different and which one is better?
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Social recommendations and mentions

Based on our record, ExplainDev seems to be more popular. It has been mentiond 4 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

ExplainDev mentions (4)

  • Buildling ReReview AI - chatbot to help find the best AI tools for any task or team (with GPT-4)
    Thanks for the note. Generally best to just describe the task (need to improve the system prompt to always only return tools). Here's the response I got: https://imgur.com/a/NyHBCe2 (https://programming-helper.com/ , https://explain.dev/ , https://tldrdev.ai/ , https://code-mentor.ai/) In addition to the categorization and summary (driven by GPT-4), it takes into account performance metrics of the tool (visits,... Source: over 3 years ago
  • Why don't there seem to be any courses based around the idea of maintaining and extending legacy software?
    Agree with so many of the comments here. I believe the way to equip folks to be productive with legacy code is build tools that replicate the goodness of an experienced engineer while on the job. Supplement the help available and ensure the person onboarding is benefitting from the questions that were asked by new folks before them. I started building the tool here: explain.dev While courses could help you feel... Source: over 3 years ago
  • Make image tutorials in no time with code explanations from AI.
    The technology behind the images is ExplainDev, an AI powered programmer's assistant. You can think of it as an expert that's always available to answer your technical questions and explain code. - Source: dev.to / almost 4 years ago
  • Explanation of a queue data structure in JavaScript
    I used explain.dev for code explanations and snappify.io for the visuals :). Source: over 4 years ago

warmup.rocks mentions (0)

We have not tracked any mentions of warmup.rocks yet. Tracking of warmup.rocks recommendations started around Jul 2026.

What are some alternatives?

When comparing ExplainDev and warmup.rocks, you can also consider the following products

Browser AI Kit - Run AI tools directly in your browser, free and unlimited

Cache Status - Cache Status is an easy cache status and management tool located right in your address-bar.

ExplainThisCode.ai - AI-powered code explanations tailored to your skill level. Paste code, upload files, or connect GitHub repos to get personalized explanations for any programming language.

Cache Enabler - A lightweight caching plugin that creates static HTML files and stores them on your web server.

EssenceAI - Simplify Code Understanding using the power of GPT-4

CacheFly - The Fastest Global Throughput CDN

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