The world’s fastest GTFS validator. Catch errors instantly before they reach Google Maps. Runs entirely on your device-your data never leaves your computer.
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Inspired by the official standards, rebuilt for the modern era.
The easiest way to validate feeds on your machine.
Integrate ultra-fast validation into your ETL pipelines.
pip install gtfs-guru
import gtfs_guru
report = gtfs_guru.validate("data.zip")
if not report.is_valid:
print(f"Found {report.error_count} errors")
report.save_html("report.html")cargo install gtfs-guru-cli
gtfs-guru -i ./feed.zip -o ./dist
# Output JSON for CI/CD
gtfs-guru --json -i feed.zip | jq .Everything you need to know about GTFS Guru.
Think of it as a spell-checker for transit data. A validator catches errors in your feed before you submit it to apps like Google Maps or Apple Maps. GTFS Guru finds these issues instantly, saving you from a lot of debugging headaches.
Absolutely. GTFS Guru is completely free and open source (Apache 2.0 license). Whether you're using the web validator, the desktop app, or our libraries, there are no costs, no usage limits, and no hidden "premium" versions.
Your data never leaves your computer. We use WebAssembly (WASM) to run the validator directly in your browser. Our desktop and CLI tools also process everything locally. We don't upload, store, or even see your files.
GTFS Guru is built for speed. It's written in Rust, which means it can be up to 100x faster and use 10x less memory than the standard Java-based validator. It's also much easier to use in modern environments like web browsers or Python scripts.
It's a three-step process: Create a GTFS feed, use GTFS Guru to make sure it's error-free, and then submit it through the Google Transit Partner Dashboard. Having a clean, validated file is the best way to speed up publication.
The browser validator handles most feeds, but very large files (over 50MB) can hit browser memory limits. For those feeds, we recommend our desktop app or CLI tools—they can handle any size without breaking a sweat.
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