LLMSchema review
A focused open-source CLI for turning relational schemas into Markdown.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
LLMSchema is an open-source command-line tool and Go library for turning relational database schemas into Markdown documentation for LLMs and AI coding agents. It is aimed at developers and teams working with development databases who want schema context in a format that can sit alongside code. The tool runs on macOS and Linux and connects to PostgreSQL, MySQL, and SQLite.
Its strongest feature is the level of schema detail in a compact output format. LLMSchema documents tables, columns, types, indexes, constraints, and relationships, then lets teams choose between a single Markdown schema document or an overview with one file per table. Table inclusion and exclusion filters, along with database schema selection, help keep generated documentation focused. CI and migration-script integration also make it suitable for workflows where schema documentation should be regenerated as database structure changes.
The trade-off is a deliberately narrow scope. LLMSchema focuses on relational schemas across three database engines and is delivered as a local CLI rather than a hosted documentation service. It does not provide a data dictionary, so teams that need broader cataloging or business glossary capabilities should consider another tool. LLMSchema is a good fit for CLI-oriented developers who want portable Markdown for AI-assisted coding, repositories, or migrations; it is less suitable for organizations seeking a broad, browser-based database documentation platform.
LLMSchema pros and cons
- Where it wins
- Documents tables, columns, types, indexes, constraints, and relationships
- Outputs one Markdown file or an overview plus per-table files
- Supports table filtering, CI, and migration-script integration
- Where it doesn't
- Supports only PostgreSQL, MySQL, and SQLite
- Runs on macOS and Linux as a local CLI and Go library
- Does not provide a data dictionary
LLMSchema fact sheet, pricing and score →
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