Less typing,
more discovery.

Open-source tools for analysts who need to understand their data before they query it.

Get StartedBrowse Types

Open a fresh CSV and every column is a string. Is that number a price or a postal code? Are those dates ISO 8601 or DD/MM/YYYY? Guess wrong and you find out three hours later, when a join returns nonsense. FineType reads the file, tells you what each column really is, then loads it into DuckDB with the types already right.

Terminal
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What you get

Every type prediction is a guarantee, not a guess.

240 Semantic Types
Dates, emails, IPs, UUIDs, coordinates, phone numbers, and financial identifiers — across 7 domains and 65+ locales.
Agent Ready
Ships with Claude Code skills that guide AI agents through the full pipeline — profile, validate, and load without stopping early.
Fast and Local
Pure Rust, no Python. 600+ classifications per second, 8.5 MB memory. Runs on your laptop — no cloud required.

Get started

FineType is free, open source (MIT), and ready to use.

curl -fsSL https://install.meridian.online/finetype | bash
brew install meridian-online/tap/finetype
cargo install finetype-cli
irm https://install.meridian.online/finetype/win | iex

Pairs with DuckDB — FineType reads and writes your data through it, so install both: brew install duckdb. Full steps →

Quick Start Guide
Install FineType and DuckDB, profile your first dataset in five minutes.
FineType Reference
Full CLI, DuckDB extension, taxonomy, and performance benchmarks.