Breach Browser
February 19, 2026
Python Flask Elasticsearch security
Breach Browser is a self-hosted search engine designed for fast, full-text lookup over large plaintext datasets.
Full write-up coming soon.
Key features
- Advanced search syntax (exact, wildcard, boolean operators)
- Handles datasets in the hundreds of GB
- REST API + browser UI via Flask
- Powered by Elasticsearch under the hood
Stack
Python + Flask web layer, Elasticsearch for indexing and querying.