Bulk RSS Feed Duplicate Remover

WHAT IT DOES Bulk RSS Feed Duplicate Remover solves a common feed management challenge: duplicate RSS feeds accumulate over time as you subscribe to the same feed from different sources, via different URLs, or through multiple discovery methods. Duplicate feeds clutter your RSS reader and cause redundant content. This tool lets you enter a list of RSS feed URLs, fetches each feed to extract the title and site URL, then identifies duplicates by comparing normalized URLs, titles, and site URLs. All feeds are displayed in a scrollable checklist with duplicate group indicators (yellow for duplicates, green for unique). You can select which feeds to keep and which to remove, or use the "Keep First of Each" button to automatically keep the first instance of each duplicate group. You can filter by duplicate status and export the cleaned list as OPML for import into any RSS reader, or as CSV or JSON. WHERE IT RUNS This extension panel runs directly inside your browser as an overlay on any web page. It works independently of any specific site and requires no additional API keys or permissions beyond the BotGentz extension. The tool fetches feed content to extract metadata and identify duplicates, making it usable from any browser session. HOW TO USE After installing the BotGentz extension and activating Bulk RSS Feed Duplicate Remover, click the extension icon in your browser toolbar to open the panel. Enter your RSS feed URLs in the text area — you can separate them by commas or new lines. For example: "https://feeds.feedburner.com/example, https://example.com/feed, https://news.ycombinator.com/rss" or each on its own line. Click "Validate & Find Duplicates" to process the feeds. The tool fetches each feed, validates it, and extracts the title and site URL. Results appear with color-coded status: green for unique, yellow for duplicates, gray for invalid. Duplicate feeds are grouped together with a " [keep]" indicator on the first instance. Use the "Keep First of Each" button to automatically select the first instance of each duplicate group. Manually adjust selections using the checkboxes. Choose your export format: OPML (for RSS readers), CSV (for spreadsheets), or JSON (for structured data). Click "Export Cleaned" to copy the data to your clipboard. You can then import the OPML file into your RSS reader. TECHNICAL OPERATION — Duplicate Detection and Feed Cleaning This tool fetches each feed URL using GM_xmlhttpRequest and extracts the feed title from the tag and site URL from the tag. Duplicate detection uses three comparison criteria: feed URL (normalized by removing protocol and trailing slashes), feed title (case-insensitive), and site URL (normalized). Feeds are grouped into duplicate groups when any of these criteria match. The tool marks the first feed in each group as the "original" (with a "keep" indicator) and all others as duplicates. The "Keep First of Each" button automatically selects the original feeds and deselects duplicates. Users can also manually select which feeds to keep using checkboxes. The cleaned list can be exported as OPML (following OPML 1.1 specification), CSV, or JSON. The tool uses a 300ms delay between feed validations to prevent rate limiting. THE PANEL The extension panel is fully draggable and remembers its position per site session. It snaps to the nearest edge of the browser viewport when dragged within 50 pixels of any side. You can collapse the panel to a compact title bar using the minimize button, preserving your selection state. The panel resizes vertically by dragging the bottom edge. Press the Escape key to close the panel instantly. The preview updates in real-time as you select feeds. PLEASE NOTE This tool requires the free BotGentz extension to function. The script fetches each feed URL to extract metadata and identify duplicates. It does not store, transmit, or log any feed data, URLs, or user activity. All operations are performed locally in your browser session. Duplicate detection uses a combination of URL normalization, title comparison, and site URL comparison. Some feeds may have identical content but different metadata — the tool may not detect these as duplicates. Invalid feeds (non-RSS content or HTTP errors) are marked gray and cannot be selected for export. OPML export is compatible with most RSS readers including Feedly, Inoreader, NewsBlur, and others. The tool uses a 300ms delay between feed validations to prevent rate limiting. Always review the duplicate groups before exporting to ensure you're keeping the correct feeds.