Substack Archive Search - Offline Post Indexer
Overview
Search any Substack archive instantly. Build a private, offline index to find posts by title or full-text
Substack Archive Search is the ultimate discovery tool for power users. It builds a local, searchable index of any publication, allowing you to bypass Substack's limited native search and find exactly what you need in seconds. Note: This extension is a search and discovery tool. It indexes archives to help you find posts; clicking a result will take you to the post on Substack.com to read. 🔍 Advanced Substack Search Engine. Native search can be slow and often misses older content. This extension creates a high-speed local database of a publication’s history. Instant Filtering: Sort by date, title, or relevance. Deep Indexing (Pro): Search the full-text content of every article, not just the headlines. 📂 Build a Personal Research Knowledge Base Perfect for journalists, academics, and researchers who need to track a writer’s specific mentions of topics over time. Metadata Indexing: Automatically captures author names, tweet-IDs, and publication dates. Offline Access: Browse your indexed search results even when you don’t have an internet connection. 🔒 Privacy-First Indexing Unlike web-based search tools, all indexing happens locally. No data is sent to a backend. Your search history stays on your machine. Compatible with custom Substack domains. ⚡ Optimized for Performance Built using IndexedDB, this extension can handle archives with thousands of posts without slowing down your browser. It’s the fastest way to turn a newsletter archive into a searchable library.
Details
- Version1.0.1
- UpdatedFebruary 10, 2026
- Size4.56MiB
- Languages51 languages
- DeveloperNeo Cortex LLCWebsite
30 N Gould St Ste. N Sheridan, WY 82801-6317 USEmail
neocrtxai@gmail.comPhone
+1 212-565-2853 - TraderThis developer has identified itself as a trader per the definition from the European Union and committed to only offer products or services that comply with EU laws.
- D-U-N-S141149254
Privacy
Substack Archive Search - Offline Post Indexer has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.
Substack Archive Search - Offline Post Indexer handles the following:
This developer declares that your data is
- Not being sold to third parties, outside of the approved use cases
- Not being used or transferred for purposes that are unrelated to the item's core functionality
- Not being used or transferred to determine creditworthiness or for lending purposes
