Last updated on May 28, 2026
Thai Law Library · ห้องสมุดกฎหมายไทย
Thailand’s codified law, made readable.
Five core Thai legal codes and the leading Supreme Court decisions, annotated bilingually and powered by AI. Built by a Canadian-Thai law firm with 30+ years in legal practice and 20+ years on Thai law. Free to read.
The Five Codes
Pick a code. Read the article. See the case law.
Each article is paired with its Thai original, English translation, plain-language commentary, and the Supreme Court decisions (Dika) that have shaped how it’s actually applied.
Civil & Commercial Code
ประมวลกฎหมายแพ่งและพาณิชย์
The backbone of Thai private law — contracts, family, succession, property, juristic acts. 1,755 articles, annotated.
1,755 articles · Books 1–6 · Annotated Open the Code →Criminal Code (Bilingual)
ประมวลกฎหมายอาญา
The first free, fully bilingual annotated Thai Criminal Code. 429 sections side-by-side with 65 Supreme Court decisions.
429 sections · 65 Dika rulings · EN·TH Open the Code →Land Code
ประมวลกฎหมายที่ดิน
Title deeds, foreign ownership restrictions, leasehold, condominium quotas, usufruct, expropriation. Chapters 1–12.
Chapters 1–12 · Annotated Open the Code →Foreign Business Act
พ.ร.บ. การประกอบธุรกิจของคนต่างด้าว
Schedules 1–3, the 49% rule, Treaty of Amity, BOI carve-outs, nominee shareholdings — with the case law that defines the line.
Schedules 1–3 + Supreme Court case law Open the Code →Supreme Court Decisions
คำพิพากษาฎีกา (คัดสรร)
Curated Dika rulings from 1936 to today, organised by topic — usufruct, defamation, child custody, FBA, criminal procedure.
Curated · 1936–present Browse cases →AI Legal Assistant
ผู้ช่วยกฎหมาย AI
Ask a question in plain English or Thai. Get an answer drawn from the same annotated codes a Thai lawyer would consult.
Trained on the library · Free to try Ask the assistant →How people use this
Three concrete examples.
01
A foreign investor before signing a JV
Checks Foreign Business Act Schedule 3 to confirm the target activity isn’t restricted, then reads the Supreme Court rulings on nominee structures before agreeing on capital terms.
02
An expat family handling an inheritance
Reads Book V of the Civil & Commercial Code on succession side-by-side in Thai and English, then asks the AI assistant whether a will drafted abroad is enforceable in Thailand.
03
A lawyer doing diligence on a condo block
Uses the Land Code annotated edition to verify the 49% foreign-ownership cap on the building, and pulls the relevant Dika decisions from the curated Supreme Court collection.
Don’t want to read 1,755 articles? Just ask.
Our AI Legal Assistant is trained on this exact library — the annotated codes, the Supreme Court rulings, our case notes from twenty years of expat practice. Free to try, in English, French and Thai.
Ask the AI Assistant →Built by Sebastien H. Brousseau, LL.B., B.Sc.
Managing Director of ThaiLawOnline since 2006. 30+ years in legal practice. 20+ years on Thai law and expat matters — family, property, immigration, business. The library is updated against the Royal Gazette every month.
Need help applying this to your case?
Reading the code is one thing. Acting on it — with the right structure, the right paperwork, the right Thai partners — is what we do every day.
Book a Consultation → Contact the firm