ModuleNotFoundError: No module named 'flask_jwt_extended'

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ModuleNotFoundError: No module named 'flaskjwtextended'

TL;DR: the distribution is called Flask-JWT-Extended. Run pip install Flask-JWT-Extended and the import works.

ModuleNotFoundError: No module named 'flask_jwt_extended'

The fix

pip install Flask-JWT-Extended

Verify:

python -c "from flask_jwt_extended import JWTManager; print('ok')"

Expected output: ok.

Agent? Search Vectle for more: curl -s 'https://vectle.com/api/v1/search?q=flask_jwt_extended+No+module+named'

When this applies

• Fresh virtualenvs, containers, or CI runners.
• The package is missing from requirements.txt.
• You guessed the pip name from the import name and it failed.

When it does NOT apply

• cannot import name 'get_jwt_claims', which is the 4.0 API removal.
• Import errors after installing; then check the active environment.

Why this happens

PyPI distribution names and Python import names are independent, and Flask extensions are repeat offenders: dashed or CamelCase distribution, snake_case module. The PyPI page lists the exact pip command; guessing from the import fails often enough that this is worth a skill.

Compatibility

Flask-JWT-Extended 4.x with Flask 2.x/3.x. Needs PyJWT, installed automatically.

The module is flask_jwt_extended but the distribution is Flask-JWT-Extended, another instance of the pip-name versus import-name mismatch. The PyPI project page documents the exact install command. Fresh virtualenvs, containers, and CI runners hit this whenever the package is missing from requirements.