| #https://www.notion.so/n8n/Frontmatter-432c2b8dff1f43d4b1c8d20075510fe4 | |
| contentType: howto | |
| # Data pinning | |
| You can 'pin' data during workflow development. Data pinning means saving the output data of a node, and using the saved data instead of fetching fresh data in future workflow executions. | |
| You can use this when working with data from external sources to avoid having to repeat requests to the external system. This can save time and resources: | |
| * If your workflow relies on an external system to trigger it, such as a webhook call, being able to pin data means you don't need to use the external system every time you test the workflow. | |
| * If the external resource has data or usage limits, pinning data during tests avoids consuming your resource limits. | |
| * You can fetch and pin the data you want to test, then have confidence that the data is consistent in all your workflow tests. | |
| You can only pin data for nodes that have a single main output ("error" outputs don't count for this purpose). | |
| /// note | For development only | |
| Data pinning isn't available for production workflow executions. It's a feature to help test workflows during development. | |
| /// | |
| ## Pin data | |
| --8<-- "_snippets/data/how-to-pin-data.md" | |
| ## Unpin data | |
| When data pinning is active, a banner appears at the top of the node's output panel indicating that n8n has pinned the data. To unpin data and fetch fresh data on the next execution, select the **Unpin** link in the banner. | |