Clamp

About

Clamp is an open-source OSINT capture tool for investigators, researchers, and analysts who need verifiable records of web pages.

Three capture modes:

Screenshot: Full-page JPEG screenshot with optional capture header showing URL, timestamp, and domain
HTML: Self-contained HTML snapshot with all resources inlined for offline viewing
Package: Complete evidence bundle with screenshot, HTML snapshot, PDF, HTTP headers, DNS records, TLS certificate data, WHOIS/RDAP, and page metadata — all integrity-hashed and timestamped
Evidence packages include:

SHA-256 hashes for every captured file, recorded in a signed manifest
RFC 3161 timestamp proof from FreeTSA to establish when the capture was made
Full capture log with timestamps for each operation
Browser and environment metadata for chain-of-custody documentation
Additional features:

Wayback Machine submission to archive the page alongside your local capture
Built-in package verification tool that re-hashes every file and validates the timestamp proof
Adjustable scroll settings for capturing lazy-loaded content on slow connections (e.g. Instagram, Twitter feeds)
Investigator name, case reference, and role fields for professional use
Works on any publicly accessible web page
No data is collected, stored remotely, or transmitted to any server other than FreeTSA (for timestamping, opt-in per capture) and the Wayback Machine (opt-in per capture). All processing happens locally in your browser.