An open source multi-tool for exploring and publishing data https://datasette.io
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Simon Willison 5138e95d69 Migrate homepage to use bulk allowed_resources() and fix NULL handling in SQL JOINs
- Updated IndexView in datasette/views/index.py to fetch all allowed databases and tables
  in bulk upfront using allowed_resources() instead of calling check_visibility() for each
  database, table, and view individually
- Fixed SQL bug in build_allowed_resources_sql() where USING (parent, child) clauses failed
  for database resources because NULL = NULL evaluates to NULL in SQL, not TRUE
- Changed all INNER JOINs to use explicit ON conditions with NULL-safe comparisons:
  ON b.parent = x.parent AND (b.child = x.child OR (b.child IS NULL AND x.child IS NULL))

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Co-Authored-By: Claude <noreply@anthropic.com>
2025-10-24 10:32:18 -07:00
.github models: read permission for tmate 2025-10-22 16:16:49 -07:00
datasette Migrate homepage to use bulk allowed_resources() and fix NULL handling in SQL JOINs 2025-10-24 10:32:18 -07:00
demos Fixed an unnecessary f-string 2024-02-04 10:15:21 -08:00
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.gitattributes New explicit versioning mechanism 2020-10-28 20:38:15 -07:00
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.isort.cfg Used isort to re-order my imports 2018-05-14 00:04:23 -03:00
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ruff.toml Fixed a bunch of unused imports spotted with ruff 2024-02-06 17:27:20 -08:00
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setup.py Fix for asyncio.iscoroutinefunction deprecation warnings 2025-10-08 20:32:16 -07:00
test-in-pyodide-with-shot-scraper.sh Introduce new /$DB/-/query endpoint, soft replaces /$DB?sql=... (#2363) 2024-07-15 10:33:51 -07:00

Datasette

PyPI Changelog Python 3.x Tests Documentation Status License docker: datasette discord

An open source multi-tool for exploring and publishing data

Datasette is a tool for exploring and publishing data. It helps people take data of any shape or size and publish that as an interactive, explorable website and accompanying API.

Datasette is aimed at data journalists, museum curators, archivists, local governments, scientists, researchers and anyone else who has data that they wish to share with the world.

Explore a demo, watch a video about the project or try it out on GitHub Codespaces.

Want to stay up-to-date with the project? Subscribe to the Datasette newsletter for tips, tricks and news on what's new in the Datasette ecosystem.

Installation

If you are on a Mac, Homebrew is the easiest way to install Datasette:

brew install datasette

You can also install it using pip or pipx:

pip install datasette

Datasette requires Python 3.8 or higher. We also have detailed installation instructions covering other options such as Docker.

Basic usage

datasette serve path/to/database.db

This will start a web server on port 8001 - visit http://localhost:8001/ to access the web interface.

serve is the default subcommand, you can omit it if you like.

Use Chrome on OS X? You can run datasette against your browser history like so:

 datasette ~/Library/Application\ Support/Google/Chrome/Default/History --nolock

Now visiting http://localhost:8001/History/downloads will show you a web interface to browse your downloads data:

Downloads table rendered by datasette

metadata.json

If you want to include licensing and source information in the generated datasette website you can do so using a JSON file that looks something like this:

{
    "title": "Five Thirty Eight",
    "license": "CC Attribution 4.0 License",
    "license_url": "http://creativecommons.org/licenses/by/4.0/",
    "source": "fivethirtyeight/data on GitHub",
    "source_url": "https://github.com/fivethirtyeight/data"
}

Save this in metadata.json and run Datasette like so:

datasette serve fivethirtyeight.db -m metadata.json

The license and source information will be displayed on the index page and in the footer. They will also be included in the JSON produced by the API.

datasette publish

If you have Heroku or Google Cloud Run configured, Datasette can deploy one or more SQLite databases to the internet with a single command:

datasette publish heroku database.db

Or:

datasette publish cloudrun database.db

This will create a docker image containing both the datasette application and the specified SQLite database files. It will then deploy that image to Heroku or Cloud Run and give you a URL to access the resulting website and API.

See Publishing data in the documentation for more details.

Datasette Lite

Datasette Lite is Datasette packaged using WebAssembly so that it runs entirely in your browser, no Python web application server required. Read more about that in the Datasette Lite documentation.