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Extract & Filter Reddit Posts & Comments with Keyword Search & Markdown Formatting

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Created by: Muhammad Asadullah || asadtech

Muhammad Asadullah

Last update

Last update 3 hours ago

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Reddit Posts & Comments Scraper

A powerful workflow to scrape Reddit posts and comments by keywords and/or subreddit, with intelligent filtering and formatting.

How it works

  1. Search Reddit - Accepts keywords and/or subreddit parameters via webhook to search for relevant posts
  2. Filter & Sort - Filters posts by date (last 60 days), minimum upvotes (20+), removes duplicates, and sorts by popularity
  3. Extract Comments - For each post, retrieves and extracts the top 20 most upvoted comments with their reply threads
  4. Format Results - Structures all posts and comments into a clean, readable markdown report
  5. Return Data - Sends the formatted report back as a webhook response, ready for use in AI tools or other applications

Set up steps

Time to set up: ~10 minutes

1. Create Reddit App (5 minutes)

  • Go to https://www.reddit.com/prefs/apps and create a new app
  • Add your n8n URL and callback URL in the "redirect uri" field (you'll find this in the Reddit OAuth2 credentials setup in n8n)
  • Copy your app's Client ID and Client Secret

2. Configure Reddit Credentials in n8n (2 minutes)

  • In n8n, create new Reddit OAuth2 API credentials
  • Paste your Client ID and Client Secret from step 1
  • Complete the OAuth2 authentication flow

3. Update Webhook URLs (2 minutes)

  • Update the webhook URLs in the example HTTP request nodes to match your n8n instance URL
  • The workflow has two webhooks:
    • /webhook/reddit-search-keyword - for searching by keywords only
    • /webhook/reddit-search-subreddit - for searching within a specific subreddit

4. Customize Filters (1 minute - optional)

  • Date filter: Line 6 in "Posted in Last x days" node (default: 60 days)
  • Upvote filter: "Upvotes Requirement Filtering" node (default: 20+ upvotes)
  • Post limit: "Limit" node (default: 10 posts)

5. Test the Workflow

  • Use the example HTTP request nodes to test both search methods:
    • Keywords only: ?keywords=your,keywords,here
    • Subreddit search: ?keywords=your,keywords&subreddit=SubredditName

Usage Examples

Search by keywords:

GET https://your-n8n.com/webhook/reddit-search-keyword?keywords=AI,machine learning

Search within subreddit:

GET https://your-n8n.com/webhook/reddit-search-subreddit?keywords=ChatGPT,GPT-4&subreddit=OpenAI

The workflow returns a formatted text report with all posts, their metadata, and top comments ready for analysis or AI processing.