# Substack Archive Search - Substack Post Indexer

> Search any Substack archive instantly. Build a private, offline index to find posts by title or full-text

Canonical page: [https://chrome-stats.com/d/substack-archive-search](https://chrome-stats.com/d/substack-archive-search)

## Overview

- **ID:** `substack-archive-search`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Neo Cortex
- **Category:** feeds-news-blogging,download-management,search-tools
- **Daily users:** 1
- **Rating:** 5.00 / 5 (3 ratings)
- **Version:** 1.0.6
- **Last updated:** 2026-08-29
- **First published:** 2026-05-17
- **Size:** 6.51 MB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/substack-archive-search/)
- **Website:** [https://www.neocortexai.in/#contact](https://www.neocortexai.in/#contact)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/substack-archive-search/privacy/](https://addons.mozilla.org/firefox/addon/substack-archive-search/privacy/)

## Description

Substack Archive Search lets you index, search, and browse entire Substack publications locally — with no backend and full privacy. Build your own offline, searchable archive of Substack posts and instantly find what you’re looking for.

Whether you’re a researcher, writer, journalist, or power reader, this extension turns any Substack into a fast, personal knowledge base.

🔍 Powerful Local Search
- Instantly search posts by title.
- Sort and filter large archives with pagination
- Jump directly to any post in the publication’s history
Pro users can unlock full-text search across entire articles.

📂 Local Archive Indexing
- Index thousands of Substack posts directly in your browser
- Data is stored locally using IndexedDB
Once indexed, your archive is available even offline.

💎 Deep Search (Pro)
Upgrade to Pro to enable deep indexing, which downloads and indexes the full text of every post.
- Search inside article content
- Find exact phrases, topics, and references
- Ideal for long-running newsletters and research-heavy publications

🔒 Privacy-First by Design
- All data stays on your device
- No cloud storage
-No tracking
- No data resale
Your reading history and indexed content are never uploaded anywhere.

⚡ Fast & Efficient
- Optimized local indexing and search
- Built for large archives
- Faster than Substack’s built-in search

🎯 Perfect For
- Researchers exploring long-running Substack archives
- Writers collecting references and inspiration
- Newsletter readers managing multiple subscriptions
- Anyone who wants fast, offline access to Substack content

🛠️ How It Works
- Visit any Substack publication (including custom domains)
- Open Substack Archive Search
- Index the archive (shallow or deep)
- Search and browse instantly

🆓 Free vs Pro
Free includes:
- Shallow indexing (titles)
- Local archive browsing
- Basic search and sorting

Pro unlocks:
- Deep indexing with full-text search
- Unlimited indexing
- Advanced controls

Stop scrolling endlessly through old posts.
Explore Substack archives the smart way: locally, privately, and fast.

Extension contains links to other useful free tools from the developer.

## Rankings

- #71,872 — Overall
- #207 — post

## Permissions and access

### Permissions

- `storage`
- `unlimitedStorage`
- `identity`

### Host permissions

- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension was recently updated in the past month. New updates may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/substack-archive-search)