Lightning-fast web validation for large websites
rocketvalidator.com Chrome Web StoreSoftware Development / Testing & Code Quality
- Monthly visits
- 15.6K
- Up34.3%MoMSep 2026
- Public revenue
- Undisclosed
- No public revenue evidence yet
- Entry price
- $5.4/mo
- Lower than 91% of peersNiche median $20/mo
- Launched
- 10y ago
- 2016-08-17 · Est.
Traffic
Marketing moves
Launches, search & content, referrals, promotionsLaunched on Product HuntLaunch
Official API to integrate report data in your projects
May 6, 2020 · 6y agoLaunch page
Launched on Show HN (6 pts · 1 comments)Launch
Rocket Validator, automated site-wide HTML validation for large sites
Nov 15, 2016 · 10y agoLaunch page
Launched on Product HuntLaunch
Site-wide Accessibility Scanner for large sites
Aug 17, 2016 · 10y agoLaunch page
MCP Server & Agent Ecosystem
- Ecosystem & integrations:
- NetlifyHerokuGitHub PagesAnthropic ClaudeChatGPTCodexOpenCodeClaude
Store data
Adds links to HTML validation guides next to each issue in the W3C Validator and validator.nu.
- Rating
- ★ 5.004 ratings
- New ratings last mo
- —
- Price & IAP
- FreeIAP data not synced
- Users
- 18Public store figure
Adds quick-access links to HTML validation guides and curated references next to each issue in the W3C Validator and validator.nu. HTML issues returned by the W3C Validator can be a bit cryptic, as they lack a help guide explaining the nature of the issues and how to fix them. This extension enriches each reported issue with helpful links: - Rocket Validator HTML Guides — direct match on the extensive Rocket Validator guides library, which also references MDN, the HTML Spec, W3C, web.dev, Can I Use and other authoritative sources. - Search engines — one-click lookup of the issue on the major search engines. - AI assistants — ask ChatGPT or Mistral to explain the issue or suggest a fix. No setup or registration needed to use this free extension.
Store assets, rating histograms, install tiers, and screenshots are synced from Apple App Store, Google Play, and Chrome Web Store.
Traffic sources
Traffic breakdown
Channels
- Direct40%
- Organic Search33%
- Referrals11%
- Social6%
- Other10%
Countries
- Germany61%
- United States8%
- Netherlands8%
- France6%
- India6%
Search
Domain authority —Domain registered 2015-11-27
| Keyword | Monthly volume |
|---|---|
| end tag strong violates nesting rules. | 110 |
| stray start tag “head” | 110 |
| the character encoding was not declared. proceeding using windows-1252. | 90 |
| find missing semicolon in css | 90 |
| unexpected unknown value "bold" for property "font-style" (declaration-property-value-no-unknown) | — |
Traffic data: Vaneform
Pricing
Trial: None · Observed 2026-11-04 · Pricing page
Entry price $5.4/mo, Lower than 91% of peers; “Testing & Code Quality” median is $20/mo.View pricing benchmark
Pages & changes
Key pages
Weekly snapshots- Homerocketvalidator.com/
- Pricingrocketvalidator.com/pricing Snapshot 2026-11-04
Changes
Design
Soft & Friendly (Light canvas, balanced density) featuring split copy & visual layout and product ui screenshot / component visuals.
First-screen preview · click to zoom
First-screen pitch & conversion flow
“Lightning-fast web validation for large websites”
Split Copy & Visual hero structure paired with start free / sign up CTA and customer / press logo strip.
Conversion path: Split Copy & Visual + Product UI Screenshot / Component → Start Free / Sign Up · Trust bar: Customer / Press Logo Strip
- Outcome & Speed Promise
- Large Hero Product Shot
- Customer Logo Wall
Palette · click to copy
- Typography
- 8.0
- Color & Contrast
- 8.0
- Layout & Spacing
- 8.0
- Craft & Polish
- 8.0
- Distinctiveness
- 6.0
Structure
- Fonts
- Inter
- Hero layout
- Split Copy & Visual
- Primary visual
- Product UI Screenshot / Component
- Conversion CTA
- Start Free / Sign Up
- Social proof
- Customer / Press Logo Strip
- Navigation
- Full-Width Top Bar
- Theme & density
- Light · Balanced
- Corners & depth
- Medium Radius · With shadow
Preview full AI design brief (includes :root CSS variables & layout rules)Style tokens only; never copy brand names, logos, copy, or images
# Design Brief: Soft & Friendly (with Enterprise Clean)
Warm low-saturation pastels, generous rounded corners, and approachable illustrations.
## Design Tokens
```css
:root {
--background: #ffffff;
--surface: #f5f6f4;
--foreground: #171717;
--muted-foreground: #777777;
--accent: #078f19;
--radius: 8px;
--font-heading: "Inter", ui-sans-serif, system-ui, sans-serif;
--font-body: "Inter", ui-sans-serif, system-ui, sans-serif;
}
```
Color area ratio: Background #FFFFFF (~77%) · Surface #F5F6F4 (~6%) · Text #171717 (~9%) · Muted Text #777777 (~4%) · Accent #078F19 (~4%). Background and surface dominate the canvas; reserve the accent color for primary buttons and active states.
## Layout & Conversion Structure
- Hero layout: Split Copy & Visual
- Navigation: Full-Width Top Bar
- Theme & density: Light · Balanced
- Border radius & elevation: Medium Radius; use elevation shadows to separate layers
- Primary visual medium: Product UI Screenshot / Component
- Conversion CTA: Start Free / Sign Up · Trust bar uses Customer / Press Logo Strip
- Headline hook: Outcome & Speed Promise
- Hero components: Large Hero Product Shot, Customer Logo Wall
- Spatial layout notes: Split Copy & Visual hero structure paired with start free / sign up CTA and customer / press logo strip.
- Visual summary: Soft & Friendly (Light canvas, balanced density) featuring split copy & visual layout and product ui screenshot / component visuals.
## Avoid
- Harsh pure-black backgrounds
- Sharp 0px corners
- Cold technical jargon in hero copy
Implement the UI following the design tokens and layout specifications above: use only these color variables, and reserve the accent color strictly for primary actions and active states. Adopt only this visual style—never copy any reference product’s brand name, logo, copy, or imagery.
Questions & evidence
- How much does Rocket Validator cost?
- 1K Weekly: €5 / week; 1K: €9/month; 10K: €29/month. Observed 2026-11-04. Check the source for current billing terms, usage limits and taxes.Source
- How much website traffic does Rocket Validator get?
- Vaneform estimates 15.6K website visits in 2026-09. Visits can include repeat visits; this estimate measures web traffic separately from paying customers or revenue.Source
- What is Rocket Validator and what platforms does it support?
- Rocket Validator is catalogued under Testing & Code Quality: Lightning-fast web validation for large websites. Supported platforms: Browser Extension, MCP Server.
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