How to Do SEO in Thailand: A Practical Guide

The basics of SEO don’t change at the border. Google still needs to crawl your pages, understand them and trust them. What changes in Thailand is the context those basics sit in, and that context decides whether your work pays off.

Start with the numbers. DataReportal’s newest report counts 67.6 million internet users in Thailand, or 94.6% of the population, and 99.0 million mobile connections, which is 138% of the population (DataReportal, Digital 2027: Thailand, published 4 November 2026). Almost everyone is online, and most of them are online on a phone. StatCounter put mobile at 78.38% of web traffic in Thailand in September 2026, against 18.31% for desktop (StatCounter).

Then there’s language. Most people in Thailand search in Thai, and Thai behaves differently from English in ways that affect keyword research, titles and even URLs. We cover that in detail below, because it’s where most foreign brands go wrong.

Third, Thai buyers check other places before they trust you. LINE is close to universal, Pantip is one of the most visited websites in the country, and food, travel and beauty decisions often run through Wongnai, Facebook groups and TikTok. Search rewards brands that show up consistently across all of those.

Finally, the way Google shows results is changing. AI Overviews and AI Mode now work in Thai, and ChatGPT is widely used. If you want the bigger picture of how answer engines choose sources, start with our guide to answer engine optimization, and for tracking it, see how to measure AI visibility and AI citations.

To keep things concrete, we’ll follow one made-up business through this guide: Lanna Bean Co., a hypothetical coffee roaster in Chiang Mai. It runs two cafes, sells beans online to buyers across Thailand, and wants English-speaking visitors and expats to find it too. Its problems are the ones we see most often: an English-first website, Thai pages that read like translations, and no idea whether AI tools mention it at all.

Most people in Thailand search in Thai. That sounds obvious, but many foreign brands still launch in English and assume people will adapt. They mostly don’t.

The clearest data point is English proficiency. Thailand ranked 116th of 123 countries in the EF English Proficiency Index 2025 with a score of 402, which EF classes as very low proficiency. The index is based on test results from 2.2 million people (The Thaiger, December 2025). People who took a voluntary English test are, if anything, more confident in English than average, so the real picture for everyday searching is likely more Thai, not less.

But Thai search queries aren’t purely Thai either. In practice you’ll see four patterns, often for the same need:

Pure Thai. A query written fully in Thai, such as a question about where to buy coffee beans in Chiang Mai. This is usually the biggest group for consumer topics.

English brand or product names inside Thai. Thai words wrapped around an English name, like an iPhone model, a skincare brand or “SEO” itself. People rarely translate brand names.

English words written in Thai script. Many borrowed words are spelled out phonetically in Thai, so “drip coffee” or “cold brew” may be typed in Thai letters. Spelling often varies, because there’s no single official transliteration for most loanwords.

Pure English. Common for expats, tourists, B2B buyers, tech topics and international brands. Smaller in volume for most consumer niches, but often high in value.

Google’s own guidance points the same way. Its URL guidelines tell site owners to use words in the audience’s language and, where it applies, transliterated words (Google Search Central). The same logic applies to titles, headings and body copy.

The takeaway for Lanna Bean Co. is simple. Its Thai pages should be written for Thai queries, including the loanword spellings real customers use, while its English pages should target the smaller, more specific English searches from visitors and expats. Translating one keyword list into the other language misses most of both.

Thai is written without spaces between words. Spaces mark the end of phrases or sentences instead. The W3C’s Thai script notes put it plainly: in Thai, spaces separate phrases, rather than words (W3C Internationalization).

That means any search engine has to split a run of Thai characters into words before it can match a query to a page. Researchers call this word segmentation, and it’s still an active research problem. A 2024 paper in the Journal of Computer and Creative Technology compared six segmentation techniques on LST20, a Thai corpus of 3,745 news documents, and described Thai as a language whose word boundaries lack clarity (Damrongkamoltip et al., 2024).

Google hasn’t published how it segments Thai. So be wary of anyone who claims to know the exact rules. What you can control is writing that is easy to segment the way a native reader would read it.

Don’t add spaces to “help” Google. Some sites insert spaces between Thai words in titles or headings, hoping to make keywords clearer. It makes the text look unnatural to Thai readers and there’s no evidence Google needs it. Write normal Thai.

Keep spelling consistent. Loanwords often have several Thai spellings. Pick the form your customers use most (check Search Console and Google’s autocomplete) and use it consistently on a page, while mentioning a common alternative naturally where it fits.

Watch out for hidden character differences. Some Thai characters have two valid encodings. The vowel in the common word ทำ (“do” or “make”) can be stored as one character, or as two characters that look identical on screen. We tested this in Python: applying Unicode NFKC normalization to ทำ changes its code points from U+0E17 U+0E33 to U+0E17 U+0E4D U+0E32. Text copied from PDFs, design tools or some CMS plugins can end up in the decomposed form, so a page can look right but not match the way people type. If a Thai page underperforms for a phrase it clearly contains, check the raw characters.

Thai URLs: readable, but long when shared

You can use Thai words in URLs. Google’s URL guidelines give a Japanese-script URL as an example of using the audience’s language, and say non-ASCII characters should be percent-encoded in links (Google Search Central). The catch is length. Each Thai character takes three bytes in UTF-8, so the two-character word ทำ becomes %E0%B8%97%E0%B8%B3 when it’s encoded. A Thai slug that looks short in the address bar can turn into a very long string when it’s pasted into LINE or email. Either choice works; pick one, stay consistent and use 301 redirects if you ever change it.

Most businesses that target Thailand end up with at least two languages: Thai for the local market and English for visitors, expats or international buyers. Done well, a bilingual site doubles your reach. Done badly, it confuses both users and Google.

These are the bilingual SEO best practices for Thailand that matter most, all based on Google’s own guidance.

One language per page. Google says to use a single language for the content and navigation of each page and to avoid side-by-side translations (Google Search Central). A page that stacks a Thai paragraph on top of its English version serves neither audience well.

Each language gets its own URL. Use a structure such as example.com/th/ and example.com/en/, or a subdomain, so each version can be crawled, indexed and linked separately. Google also recommends separate locale URLs over pages that change content based on who is visiting (Google Search Central).

Translate the whole page. Google warns that translating only the boilerplate, such as menus and footers, while the main content stays in one language can create pages that look like duplicates with different navigation (Google Search Central). If you can’t translate a page properly yet, don’t publish a half version.

Never auto-redirect by language or location. Google advises against automatically redirecting users from one language version to another, and against using IP analysis to adapt content (Google Search Central). An English-speaking expat in Bangkok with a Thai phone, or a Thai traveler in Tokyo, should see the page they asked for. Add a clear language switcher instead.

Use the language in the visible content. Google determines a page’s language from its visible content. It doesn’t use code-level information such as the lang attribute or the URL to detect language (Google Search Central). Set the lang attribute anyway for accessibility, but don’t expect it to fix a page that’s mostly in the wrong language.

Google’s Martin Splitt summed up the same advice in a short Search Central video: pick a site structure that fits, make sure every language version links to every other one with hreflang, and don’t forcefully redirect users to a version you assume they want (Search Engine Journal).

Google Search Central · YouTube

Google Search Central · 3 Tips for International Websites · watch on YouTube

Lanna Bean Co.’s hypothetical site broke three of these rules at once. Its homepage showed English to desktop visitors and Thai to visitors on Thai phones, the shop pages had Thai menus around English product descriptions, and there was no way to switch. The fix was a /th/ and /en/ structure, Thai as the default for the shop, and a switcher in the header on every page.

Hreflang tells Google which pages are language or regional versions of each other, so it can show the Thai version to Thai searchers and the English version to English searchers. It’s one of the most useful tags for bilingual sites in Thailand and one of the easiest to get wrong.

Google supports three ways to add hreflang: link tags in the HTML head, HTTP headers and XML sitemaps. It treats them as equivalent, and using more than one gives no extra benefit (Google Search Central). Most WordPress sites use the head tags their multilingual plugin generates. Large shops often use the sitemap method.

Which codes to use for Thailand

The language part of a hreflang value uses ISO 639-1 codes and the optional region part uses ISO 3166-1 Alpha 2 codes (Google Search Central). For a Thai and English site, that usually means:

You don’t usually need th-TH. Thai is spoken almost entirely in Thailand, so the plain th code does the job. Use en-TH only if your English pages are genuinely written for people in Thailand, for example with baht prices and Thai delivery terms, and you also have a different English version for other markets. If you have just one English version, en is simpler and fine.

The rules that break most setups

Return links are mandatory. Google says each language version must list itself as well as all other language versions, and if two pages don’t link to each other, the tags are ignored (Google Search Central). In our audits, one-way hreflang is one of the problems we run into most often on bilingual sites: the Thai page points to the English page, but the English page doesn’t point back.

A region alone is invalid. Google is explicit that you can’t specify the country code by itself, so hreflang=”TH” does nothing. Reserved codes such as UK and EU have no effect either.

Use x-default for pickers. The x-default value is the fallback for users whose language settings don’t match any version. Google recommends it for language selector pages and pages that redirect automatically.

Hreflang is a hint, not a guarantee. Google’s John Mueller has pointed out that hreflang doesn’t guarantee indexing and that not every variation is necessarily indexed. When two versions are essentially the same, such as two English versions with identical content, Google often picks one as canonical, and reporting shows the canonical URL (Search Engine Roundtable, May 2025). That’s another reason not to create en-TH and en versions unless they really differ.

Server location matters much less than most people think. Google lists server location as one of several signals it can use to understand a site’s audience, but it says the signal isn’t definitive, because CDNs and hosting choices blur it (Google Search Central). The other signals it lists include a ccTLD, hreflang, local addresses and phone numbers, the language and currency on the page, local links and Business Profile data.

There’s also a practical detail. Google says the default IP addresses of Googlebot appear to be based in the USA, although it also crawls from addresses outside the US (Google Search Central). So if your server shows different content to visitors from Thailand, Google may never see your Thai content. That’s another reason to give each version its own URL.

What matters instead: speed for Thai users

Where hosting does matter is speed. A server in Europe or the US adds delay for every request from Bangkok, and that delay shows up in your Core Web Vitals. Google’s “good” thresholds are a Largest Contentful Paint within 2.5 seconds, an Interaction to Next Paint of 200 milliseconds or less and a Cumulative Layout Shift of 0.1 or less, measured at the 75th percentile of page loads and split by mobile and desktop (web.dev).

Because most Thai traffic is mobile, your mobile numbers are the ones that count. A content delivery network (CDN) with points of presence in or near Thailand is usually the easiest win. It caches images, scripts and often whole pages close to your visitors, wherever the origin server is.

Thai web fonts. Fonts that cover both Thai and Latin characters contain more glyphs than Latin-only fonts, so they are usually heavier files. Load only the weights you use, preload the main one and use font-display: swap so text appears quickly. A page that waits for a heavy Thai font before showing any text feels slow even on 5G.

Images and menus. Many Thai restaurant, cafe and clinic sites post menus and price lists as large images. They’re slow, Google can’t read the prices well, and AI tools can’t quote them. Put the text in HTML and use compressed WebP images for the visuals. Our free WebP converter does this in your browser.

Lanna Bean Co.’s hypothetical site was hosted cheaply in Europe. Moving it behind a CDN with an Asia edge, converting its menu images to HTML text and trimming its Thai font to two weights did more for its mobile experience than any change of server would have.

The single biggest Thai SEO tip is this: write Thai content in Thai, for Thai readers, instead of translating English pages. Translated Thai is easy to spot. It uses stiff, formal phrasing, the wrong loanword spellings and examples that don’t fit local life. Thai readers notice, and they leave.

Google’s ranking systems are built to reward helpful, people-first content, and Google says there are no extra requirements for AI Overviews or AI Mode beyond normal SEO best practice (Google Search Central). For Thai content, “helpful” starts with sounding like a person who actually lives the topic.

Study the top Thai pages first. Before writing, read the five Thai pages that rank best for your main query. Look at their tone (formal or casual), the words they use for key concepts, how long they are, and what questions they answer. You’re not copying them. You’re learning the vocabulary and expectations of the reader.

Answer the question in the first lines. Thai readers scan on phones just like everyone else. Put a direct answer in the first sentence under each heading, then explain. This also makes a passage easier for AI answers to quote, which we cover in our AEO guide.

Use the words people search. If customers type a loanword in Thai script, use that spelling in your heading and text, and mention the English term once where it helps. Industry terms are often clearer in English, so don’t force awkward Thai translations of technical words.

Be specific about Thailand. Prices in baht, delivery times to Bangkok and the provinces, opening hours, LINE IDs, BTS or MRT stations, and seasonal details such as the hot season or the rainy season. These details are what make content useful, and they’re exactly what translated pages leave out.

Show who wrote it. Name the author, show their real experience and add a visible date. This matters for any topic where people spend money or take risks, and it builds the kind of trust that helps a brand become a recognized entity. We explain how in what entity SEO is.

Thai titles and meta descriptions

Google doesn’t publish a character limit for titles or descriptions; what you see is cut by pixel width on the device. Thai complicates character counts, because vowels and tone marks sit above or below consonants and take no extra width, so a Thai title can have more characters than an English one and still fit. Preview Thai titles on a phone-sized screen rather than trusting a character count. Our SERP snippet preview tool helps, and keep the main Thai keyword near the start.

Lanna Bean Co.’s hypothetical Thai pages improved most when its Thai head roaster briefed a Thai writer directly instead of sending English copy to a translator.

Search doesn’t happen in a vacuum. In Thailand, people often hear about a brand in a LINE group, check it on Facebook or TikTok, read what Pantip users say, then search for it on Google. Each of those steps affects your SEO, either by creating branded searches or by putting your name on pages that Google and AI tools read.

The reach of these platforms is enormous. In GWI’s survey of online adults aged 16 and over in Q2 2026, 87.1% said they had used Facebook in the past month, 82.5% LINE, 82.0% TikTok and 81.2% YouTube (DataReportal, Digital 2027: Thailand).

LINE. LINE isn’t a search engine, and LINE chats aren’t indexed by Google. But it’s where many Thai customers ask questions and buy. A visible LINE Official Account link on your site turns organic visitors into conversations, and the questions in those chats are your best keyword research. DataReportal counts 56.3 million monthly active LINE users in Thailand.

Pantip. Pantip is Thailand’s best-known discussion forum, and its threads rank for a huge range of Thai questions. Ahrefs estimated Pantip at about 16.5 million monthly organic visits in October 2026, the seventh-largest site in Thailand by organic traffic (Ahrefs). Reading Pantip shows you how people describe problems. Taking part honestly, as a named and disclosed brand or expert, can earn mentions. Spamming it does the opposite.

Wongnai. For restaurants, cafes, spas and many lifestyle businesses, Wongnai is a key review and discovery platform, and its listings often rank alongside Google Maps results. Ahrefs put it at about 6.2 million monthly organic visits in the same period. Keep your Wongnai listing complete and consistent with your Google Business Profile.

Facebook, TikTok and Lemon8. Short videos and posts drive discovery, especially for food, beauty and travel. They rarely send much direct organic search traffic, but they create the branded searches and mentions that support rankings.

Links and mentions still matter for rankings in Thailand, and for AI answers too, because AI tools lean on what other sites say about you. The best links come from Thai websites that your customers actually read, and they’re earned, not bought.

Thai news and portal sites. As the Ahrefs data above shows, Thai portals and news sites have very large organic audiences. Coverage there comes from having something worth reporting: original data, a local angle, a useful comment on an industry change or a real event. A Thai-language press release with a clear story and real numbers gets further than an English one.

Partners and suppliers. Distributors, suppliers, venues, schools and clients you work with often have websites that list partners. These links are local, relevant and easy to ask for.

Associations and chambers. Thai trade associations, foreign chambers of commerce in Bangkok and local business groups often have member directories that are trusted and relevant.

Events and sponsorships. Local events, workshops and community activities often get written up by organizers, venues and local media. A coffee cupping workshop at Lanna Bean Co. is a better link-building idea than any link package.

Forums and communities, honestly. Answering questions on Pantip or in Facebook groups, as a disclosed brand or named expert, can earn mentions and branded searches. It works only when the answer is genuinely useful.

Mentions matter even without a link. AI tools build their picture of a brand from what other websites say, and Google uses signals of prominence for local results. Our guide to building topical authority covers how links and content work together. If you want help with the work, see our SEO service.

Thailand’s Personal Data Protection Act B.E. 2562 (2019), known as the PDPA, affects how you track visitors from organic search. It was fully enforced from 1 June 2022 (LawPlus), and the regulator has been issuing real fines.

Cookies fall under the PDPA. Thailand has no specific cookie law, so cookies are covered by the PDPA. According to Chandler Mori Hamada’s 2025 Chambers guide, strictly necessary cookies don’t need consent, but explicit consent is required before performance, functional, targeting and advertising cookies are used (Chambers Practice Guides). In practice, that usually includes analytics tags such as Google Analytics.

Enforcement is real. By August 2025, Thailand’s Personal Data Protection Committee had imposed fines totaling about THB 21.5 million, and the largest single fine was THB 7 million, against a company whose data breach led to a call-center scam (Tilleke and Gibbins). Those cases weren’t about cookies, but they show the regulator is active.

What this means for measuring SEO

Use a proper consent banner in Thai and English. Visitors should be able to accept or reject non-essential cookies as easily as each other, in the language of the page they’re reading.

Expect gaps in analytics. When some visitors decline analytics cookies, GA4 sees fewer sessions than actually happened. Don’t panic when organic sessions in GA4 look lower than clicks in Search Console. They measure different things, and consent widens the gap.

Use Search Console as your baseline. Search Console data comes from Google’s side, not from cookies on your site, so it isn’t affected by your consent banner. For SEO trends in Thailand, it’s the most consistent source you have.

For Lanna Bean Co., the hypothetical change was simple: a bilingual consent banner, GA4 set to respect consent, and a monthly report that leads with Search Console clicks and impressions for Thailand rather than GA4 sessions.

Measuring SEO in Thailand means measuring in two languages and, increasingly, in two kinds of search: classic results and AI answers. A single “rank for keyword X” number tells you very little.

Search Console, filtered to Thailand. In the Performance report, filter by country to Thailand and compare Thai and English queries separately. Google says traffic from AI features such as AI Overviews and AI Mode is included in the Performance report under the Web search type (Google Search Central), so it’s in your numbers even if it isn’t broken out.

Rankings by city and language. Results in Bangkok can differ from results in Chiang Mai or Phuket, and Thai-interface results can differ from English-interface results. Track your main keywords in the locations and languages that matter to you. Our tool GrixTrack tracks Google rankings by country, city and language, and has a free plan with 10 keywords, 5 prompts, 1 project and 2 competitors.

Conversions that fit Thailand. A lot of Thai buying happens in LINE. Track clicks on your LINE Official Account button, phone taps, map direction requests and orders as conversions, not just form submissions.

AI mentions and citations. Pick 20 to 50 real questions in Thai and English, run them in ChatGPT, Gemini and Google AI Mode, and record whether your brand is named and your pages are cited. Answers vary from run to run, which is why GrixTrack runs each prompt 3 times. Our hub guide on measuring AI visibility explains the full method.

For Lanna Bean Co., the hypothetical monthly report fits on one page: Search Console clicks for Thailand split by Thai and English queries, rankings for 30 core keywords in Chiang Mai and Bangkok, LINE clicks and online orders from organic, and a short table of how often it’s named in AI answers in each language.

Most SEO problems we see on sites that target Thailand come from a short list of avoidable mistakes. If you fix these, you’re ahead of a large share of competitors.

Launching in English only. With Thailand ranked 116th of 123 in the EF English Proficiency Index 2025, an English-only site speaks to a small slice of the market. Unless your audience is truly expats, tourists or international buyers, Thai has to come first.

Machine-translated Thai. Translated text uses the wrong words, the wrong tone and the wrong spellings. It rarely ranks for the queries Thai people actually type, and it doesn’t convince the ones who do land on it.

Automatic redirects. Redirecting visitors by IP address or browser language is against Google’s advice, and it can stop Googlebot, which mostly crawls from US IP addresses, from ever seeing your Thai pages.

Broken hreflang. One-way links, region-only codes such as TH, and tags that point to redirected or noindexed URLs. Any of these can make Google ignore the whole set.

Bought link packages. Cheap links from unrelated sites break Google’s spam policies and waste budget that could earn real coverage.

Ignoring consent. Firing analytics and advertising tags before consent creates PDPA risk, and it makes your data look more complete than it legally should be.

Not checking AI answers. Many brands still have no idea what ChatGPT or Google AI Mode says about them in Thai. Run your top questions once a month in both languages and write down what you see.

None of these fixes needs a big budget. Start with the mistakes that cost the most, usually language and structure, and work down the list.

1. StatCounter: Search engine market share in Thailand (October 2026)
2. StatCounter: Desktop vs mobile vs tablet market share in Thailand (September 2026)
3. StatCounter: AI chatbot market share in Thailand (September 2026)
4. DataReportal (Kepios): Digital 2027: Thailand (4 Nov 2026)
5. DataReportal (Kepios): Digital 2026: Thailand (8 Nov 2025)
6. Google Thailand blog: AI Mode now supports Thai (8 Oct 2025)
7. Google: AI Mode expands to more than 35 new languages and 40 new countries (7 Oct 2025)
8. Search Engine Roundtable: Google AI Mode expands to 35 new languages and 40 countries (9 Oct 2025)
9. Google Search Help: Where AI Overviews are available (countries and languages)
10. Google Search Central: AI features and your website (updated 10 Dec 2025)
11. Google Search Central: Managing multi-regional and multilingual sites (updated 10 Dec 2025)
12. Google Search Central: Tell Google about localized versions of your page (hreflang, updated 21 Sep 2026)
13. Google Search Central: Locale-adaptive pages (updated 10 Dec 2025)
14. Google Search Central: URL structure best practices (updated 21 Oct 2026)
15. Google Search Central: Do you need an SEO? (updated 5 Jun 2026)
16. Google Business Profile Help: Tips to improve your local ranking on Google
17. web.dev: Web Vitals (good thresholds for LCP, INP and CLS)
18. Search Engine Journal: Google's Martin Splitt shares 3 SEO tips for multilingual sites (15 Oct 2024)
19. Search Engine Roundtable: Google questions the need for ccTLDs for some international websites (29 Dec 2025)
20. Search Engine Roundtable: Google says hreflang doesn't guarantee indexing (13 May 2025)
21. T.H.NIC: Registration guidelines for .co.th, .in.th, .or.th and other .th domains
22. W3C Internationalization: Thai script resources
23. Damrongkamoltip et al.: Comparing Thai word segmentation methods in the LST20 dataset (Journal of Computer and Creative Technology, Aug 2024)
24. The Thaiger: Thailand ranks 116th of 123 in the EF English Proficiency Index 2025 (18 Dec 2025)
25. Google, Temasek and Bain: e-Conomy SEA 2025, Thailand report
26. The Reporter Asia: Telenor Asia Digital Lives Decoded, Thailand (21 Jan 2025)
27. Ahrefs: Top websites in Thailand by organic search traffic (October 2026)
28. LawPlus: Enforcement of Thailand's PDPA from 1 June 2022 (29 Apr 2022)
29. Chambers Practice Guides: Data Protection and Privacy 2025, Thailand (Chandler Mori Hamada, 11 Mar 2025)
30. Tilleke and Gibbins: Eight serious fines imposed in Thai data protection cases (1 Aug 2025)
31. Google Search Central on YouTube: 3 Tips for International Websites
32. Rajan Patel (Google) on X: AI Mode rolls out to new languages and countries (7 Oct 2025)

Keep reading

• Measurement & localHow to Measure AI Visibility and Track AI Citations
• Measurement & localAEO for Local Business: Get Cited by AI Near You
• AEO basicsAI Search Statistics 2026 (Global and Thailand)
• AEO basicsWhat Is AEO? Answer Engine Optimization Explained