What is DataExtract?
DataExtract is a free, 100% client-side data extraction tool that pulls structured information out of any unstructured text — emails, phone numbers, URLs, IP addresses, hashes, CVE IDs, JWT tokens and more. Just paste your text, tick the extractors you want, and get clean, downloadable JSON instantly. Everything runs in your browser using JavaScript and regular expressions: no server, no upload, no signup, and no API costs. Your data never leaves your device, which makes it safe for sensitive logs, contracts, and customer records.
What can you extract?
📧 Contact & Web Data
Bulk email extractor, phone number extractor (international and local formats with extensions), and a URL / link extractor for harvesting web addresses, subdomains, and deep links from any page or document.
💰 Business & Finance
Pull invoice numbers, order IDs, purchase orders, reference codes,
and currency amounts ($2,500, 150.00 BGN, €99)
out of receipts, statements, and emails for quick bookkeeping and data entry.
🖥️ IT & DevOps
An IP address extractor (IPv4, IPv6, CIDR), MAC address finder,
port and service detector, hostname / FQDN parser, and a
log line extractor that isolates ERROR, WARN, and
INFO entries — perfect for triaging logs and network captures.
🛡️ Security & Forensics
Extract MD5 / SHA-1 / SHA-256 / SHA-512 hashes, CVE identifiers, UUIDs, JWT tokens, and file paths — useful for threat-intel reports, IOC (indicator of compromise) collection, and incident response.
✅ Notes & Productivity
Heuristic modules surface action items, to-dos and deadlines and pull out every question asked in meeting notes, email threads, and transcripts — turning messy conversations into a clean task list.
⚡ Custom Patterns
Define your own custom keywords or run a custom regular expression (with ReDoS protection) to match anything the built-in modules don't cover — SKUs, tracking numbers, ticket IDs, or any domain-specific pattern.
Common use cases
- Lead generation & sales: scrape emails and phone numbers from copied web pages or directories.
- Log analysis: extract IPs, hostnames, ports, and error lines from server and firewall logs.
- Security research: collect hashes, CVEs, and IOCs from threat reports and pastes.
- Data cleaning & migration: convert unstructured text into structured JSON for import.
- Accounting: grab invoice numbers and amounts from emailed receipts and statements.
- Meeting follow-ups: turn notes into action items and a list of open questions.
- Developer tooling: pull UUIDs, JWTs, and file paths out of code, configs, and stack traces.
Frequently asked questions
Is DataExtract really free and private?
Yes. The tool is completely free and runs entirely in your browser. No text you paste is ever sent to a server, stored, or logged — there is no backend at all. This makes it safe to use with confidential or regulated data.
Does it use AI or an LLM?
No. DataExtract uses fast, deterministic regular expressions and keyword heuristics. That means zero API costs, instant results, and predictable, repeatable output — even on large inputs up to 100,000+ characters.
How do I export the results?
Every extractor card has a Copy button for its values, and the top bar offers Copy JSON and Download JSON for the full consolidated result set, including metadata about which extractors ran.
Can I extract data from very large documents?
Yes. Extraction runs on a background Web Worker so the interface stays responsive even with large pastes. Input is debounced so results update smoothly as you type or paste.
Can I use my own regex pattern?
Absolutely. Enable the Custom Regex module and enter a pattern in
/pattern/flags form. Patterns are validated and screened for catastrophic backtracking
(ReDoS) before they run, so a bad expression won't freeze the page.
What data types can it extract?
Emails, URLs, phone numbers, currency amounts, invoice/order identifiers, IPv4/IPv6 addresses, MAC addresses, network ports, hostnames and FQDNs, log lines, file paths, MD5/SHA hashes, UUIDs, CVE IDs, JWT tokens, plus your own custom keywords and regular expressions.