Extract Domains Now
Step 1 — Choose input method
📁
Click to upload or drag & drop
TXT · CSV · HTML · JSON · XML · LOG · MD (Max 20MB)
Step 2 — Configure extraction
Step 3 — Extract
Why a Bulk Domain Extractor? 🚀 Extract now
Small extractions can be done manually. But when you have a 15MB access log, a scraped HTML dump, or a 200,000-line email list, you need something that:
- Handles the whole file in one shot (no chunking, no re-uploads)
- Deduplicates as it goes (you don't want 3,000 copies of
google.com) - Sorts intelligently so you can spot patterns
- Exports directly to CSV / JSON / TXT for downstream tools
- Runs locally so nothing sensitive leaves your machine
How to Use Bulk Mode 🚀 Extract now
- Click the Upload File tab above the input.
- Drag & drop your file, or click to browse. Max 20MB.
- Supported types:
.txt,.csv,.html,.json,.xml,.log,.md. - Pick the right Source Type (Plain text / URL list / Email addresses).
- Toggle Remove duplicates (default on) and any TLD or subdomain filter.
- Click 🚀 Start Calculate — the page auto-scrolls to the result set.
- Use batch operations to Google-index-check, WHOIS, or open dozens at once.
What "Bulk" Means Here 🚀 Extract now
| Metric | Limit |
|---|---|
| Max file size | 20 MB per upload |
| Typical domain yield | 3,000–15,000 unique domains per 20MB file |
| Batch open in browser | Up to 500 (with confirmation prompt above 10) |
| Batch Google Index / WHOIS check | Up to 500 tabs (confirmation above 10) |
| Processing time | < 2 s for 20MB on a modern laptop |
| Export size | Unlimited (blob download) |
Bulk Extraction Use Cases 🚀 Extract now
🛡️ SOC Log Triage
Turn hours of Nginx / firewall log lines into a unique-hosts list.
🔗 Backlink Reports
Ahrefs/SEMrush exports often top 100,000 rows — deduplicate to referring domains fast.
🌍 Web-Scraper Cleanup
Post-process crawler output to build a normalised host list.
📧 Mailing List Consolidation
Group thousands of leads by employer domain before an ABM campaign.
🕵️ Threat Intel Feeds
Pull IOCs from long-form STIX / OpenCTI text dumps.
📈 Analytics ETL
Pre-clean referer columns before loading into a warehouse.
Performance & Privacy Notes 🚀 Extract now
All processing runs in your browser using the file's local blob URL — the file is never uploaded to any server. For files above 20MB, split them locally and run multiple batches. The extractor is O(n) in input size for practical purposes, so a 20MB file typically finishes in about a second on modern hardware.
Related Tools 🚀 Extract now
FAQ 🚀 Extract now
split -b 20M input.txt part_ on macOS/Linux — and process each part.FileReader API — nothing is uploaded. You can verify by checking the Network tab in DevTools during extraction./js/domain-extractor.js and run it in Node.js for automation.