SEO Toolkit
The only SEO extension that truly understands Thai. Accurate word counts, keyword density, readability scoring, and 20+ checks — all running locally in your browser. No account. No data sent anywhere.
- Free
- Open source
- Zero tracking
- Chrome · Edge · Brave
- 20SEO analyzers
- 50+tech signatures
- 127unit tests
- 200KBbundle size
- 0data sent
Why global SEO tools fail on Thai sites
Tools like Detailed SEO, Ahrefs Toolbar, and MozBar split text on whitespace. Thai has no spaces between words — so a 500-word Thai article shows as “5 words,” keyword density breaks, and readability scores become meaningless.
SEO Toolkit fixes this using Chrome’s native Thai word segmentation — the same technology that powers Google Search.
Overview
SERP preview, meta tags, canonical, robots, viewport, favicon, charset, technology detection.
Headings
Visual H1–H6 tree with hierarchy validation and empty-heading alerts.
Links
Internal vs external breakdown, nofollow flags, empty-anchor warnings.
Images
Alt-text audit — which images have descriptions, which are decorative, which are missing.
Schema
JSON-LD & microdata validator with recommended properties for 9+ schema types.
Social
Live OG preview card, Twitter Card check, hreflang table with Thai validation.
Advanced
Thai readability score, keyword density chart, DOM performance metrics.
Thai word segmentation
Counts “สวัสดีครับยินดีต้อนรับ” as 4 words, not 1 — using Chrome’s native segmenter.
Thai readability score
Sentence length and word complexity, tuned for Thai grammar.
Local SEO
Validates Thai addresses (ตำบล/อำเภอ/จังหวัด); detects Wongnai & Google Maps links.
Pantip signals
Finds Pantip topic links as social proof for Thai audiences.
Shopee & Lazada
Detects Thai e-commerce product pages and validates Product schema.
hreflang
Accepts th, th-TH, and en-TH without false warnings.
Know what any website is built with — 50+ technologies detected instantly.
CMS
- WordPress
- Shopify
- Wix
- Joomla
- Drupal
- Squarespace
- Ghost
- Webflow
- Hugo
- Jekyll
- Magento
Frameworks
- Next.js
- Nuxt
- Astro
- SvelteKit
- Remix
- Gatsby
- HTMX
- Alpine.js
- Qwik
- Solid
- Ember
Libraries
- React
- Vue
- Angular
- Svelte
- jQuery
- Bootstrap
- Tailwind CSS
- Font Awesome
- GSAP
- Three.js
Hosting
- Vercel
- Netlify
- Cloudflare Pages
- Firebase
- AWS Amplify
- GitHub Pages
| SEO Toolkit | Detailed SEO | Ahrefs Toolbar | MozBar | |
|---|---|---|---|---|
| Thai word count | ✔ | ✕ | ✕ | ✕ |
| Thai readability | ✔ | ✕ | ✕ | ✕ |
| Thai keyword density | ✔ | ✕ | ✕ | ✕ |
| Wongnai / Pantip signals | ✔ | ✕ | ✕ | ✕ |
| Shopee / Lazada detection | ✔ | ✕ | ✕ | ✕ |
| hreflang (th-TH, en-TH) | ✔ | ⚠ | ✕ | ✕ |
| Schema validation | ✔ | ✔ | ✕ | ✕ |
| OG preview | ✔ | ✔ | ✕ | ✕ |
| Tech detection (50+) | ✔ | ✕ | ✕ | ✕ |
| Dark mode | ✔ | ✕ | ✕ | ✕ |
| CSV export | ✔ | ✕ | ✕ | ✕ |
| Scan history | ✔ | ✕ | ✕ | ✕ |
| No account required | ✔ | ✔ | ✕ | ✕ |
| 100% free | ✔ | ✔ | ✕ | ✕ |
| Zero data collection | ✔ | ✕ | ✕ | ✕ |
100% local
All analysis runs in your browser. Nothing is sent to any server.
Zero tracking
No analytics, no telemetry, no cookies.
No account
Install and use immediately — no signup, no email.
Minimal permissions
Only requests activeTab and storage. No browsing history.
Open source
Inspect every line of code yourself.
SEO specialists
Accurate Thai word counts and keyword density that global tools can’t provide.
Digital marketers
Check OG previews, hreflang, and Schema before launching campaigns.
Web developers
Detect technologies, audit performance, validate structured data.
SME owners
Simple one-click scan with clear pass / warn / fail results in Thai.
Content creators
Readability scoring and heading-structure validation for Thai content.
START ANALYZING FOR FREE
Install SEO Toolkit and get instant SEO insights — no signup, no payment, no data collection. Works on Chrome, Edge, Brave, and all Chromium browsers.