---
id: itsdangerous
version: "2.2.0"
license: unclear
license_treatment: permissive
maintenance: aging
---

# itsdangerous — Safely pass data to untrusted environments and back.

License: permissive · Maintenance: aging · Popularity: top 1,000 on PyPI

## Install

pip install itsdangerous
uv add itsdangerous
poetry add itsdangerous

## Description

# ItsDangerous

... so better sign this

Various helpers to pass data to untrusted environments and to get it
back safe and sound. Data is cryptographically signed to ensure that a
token has not been tampered with.

It's possible to customize how data is serialized. Data is compressed as
needed. A timestamp can be added and verified automatically while
loading a token.


## A Simple Example

Here's how you could generate a token for transmitting a user's id and
name between web requests.

```python
from itsdangerous import URLSafeSerializer
auth_s = URLSafeSerializer("secret key", "auth")
token = auth_s.dumps({"id": 5, "name": "itsdangerous"})

print(token)
# eyJpZCI6NSwibmFtZSI6Iml0c2Rhbmdlcm91cyJ9.6YP6T0BaO67XP--9UzTrmurXSmg

data = auth_s.loads(token)
print(data["name"])
# itsdangerous
```


## Donate

The Pallets organization develops and supports ItsDangerous and other
popular packages. In order to grow the community of contributors and
users, and allow the maintainers to devote more time to the projects,
[please donate today][].

[please donate today]: https://palletsprojects.com/donate

## AI interpretation — verify before relying

ItsDangerous cryptographically signs data to create tamper-proof tokens for passing information to untrusted environments and verifying it hasn't been altered on return.

Verdict: Mature, well-maintained library from Pallets with zero known vulnerabilities and broad adoption (top 1000 PyPI). No runtime dependencies and permissive licensing make it a low-risk choice for token signing and data integrity. Aging release cadence is normal for stable, feature-complete projects.

[View on SkillFed](https://skillfed.io/packages/itsdangerous) · [View on PyPI](https://pypi.org/project/itsdangerous/)