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Tracking since Apr 27, 2026.

Changelog

• May 4, 2026
  description

  Casebook is a browser extension for investigative journalists, fact-checkers, OSINT practitioners, and researchers. Build named casebooks for each investigation. Right-click to capture pages, images, links, and selected text into the active casebook. Every item is automatically archived to the Wayback Machine. Export the casebook as an xlsx spreadsheet, a csv, or a signed zip bundle when you are ready.
  
  The extension itself contains no telemetry, no analytics, no remote code. Source code is available for review.
  
  WHAT IT DOES
  
  Open any web page that has evidence relevant to an investigation. Right-click. The browser's context menu now includes an Add to Casebook submenu. Choose:
  
  The active casebook. The item is added to the investigation you are currently working on.
  
  Any other recent casebook. The item is captured into a different investigation without you having to switch.
  
  A new casebook. Name it on the spot. The item becomes the first entry.
  
  Casebook detects what you right-clicked on automatically. Right-click on a page captures the page. Right-click on an image captures the image. Right-click on a link captures the link target. Right-click on selected text captures the selection alongside the source URL.
  
  Each captured item is queued for archiving in the background. The extension submits the URL to the Wayback Machine, polls until a permanent archive URL is returned, and records that URL in the casebook alongside the original. If the original source is later deleted or edited, the archived version remains.
  
  Click the toolbar icon to see the active casebook. Switch between casebooks from the dropdown. View every item with platform badge, archive status, source URL, and capture timestamp. Rename casebooks. Delete or re-archive individual items.
  
  THREE EXPORT FORMATS
  
  Export .xlsx for analysis. Eleven structured columns including #, date added, title, platform, type, URL, archive status, archive URL, selected text, source page, and URL hash. The xlsx is generated without external libraries; it opens in Excel, Google Sheets, and Numbers immediately.
  
  Export .csv for any tool. Same eleven columns, UTF-8 with BOM, properly escaped. Pipe into Python, R, Datasette, jq, or any other analysis tool.
  
  Export bundle for chain of custody. A signed zip containing manifest.json, items.json, and a SHA256SUMS sidecar. Verifiable offline with the standard sha256sum tool. Same provenance format as the rest of the Signal & Shadow suite. Aligned with the Berkeley Protocol on Digital Open Source Investigations.
  
  ARCHITECTURE
  
  Casebook uses Chrome's contextMenus API with the page, image, link, and selection contexts. No content script. No <all_urls> matchers. No continuous DOM monitoring. The extension's manifest declares four permissions (contextMenus, activeTab, storage, downloads) and one host permission (web.archive.org), which is required for the auto-archive feature to submit URLs to the Wayback Machine.
  
  The web.archive.org host permission is the only outbound contact the extension makes, and it is solely for Wayback Machine save submissions. No other domain is contacted by the extension.
  
  WHY THIS EXISTS
  
  Working investigations are slow and messy. Tweets that matter today are deleted next week. Evidence pages get edited or paywalled. Researchers end up with bookmarks pointing to dead URLs and screenshots whose source they cannot reconstruct.
  
  Casebook collapses two parts of the investigation workflow into one click: capturing the source URL with context, and preserving it in the Wayback Machine before it changes. The result is a chain-of-custody record per investigation that can be exported in whatever shape the next step needs.
  
  Built and maintained by Signal & Shadow, an independent investigative-journalism and OSINT practice. More at signalandshadow.io.

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• May 4, 2026
  short_description

  Build investigative and fact-check stories from social posts with auto-archiving and chain-of-custody export.

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• May 4, 2026
  name

  Casebook by Signal & Shadow

  Unknown

• May 4, 2026
  category

  productivity/workflow

  (empty)

• May 4, 2026
  host_permissions

  https://web.archive.org/*

  (empty)

• May 4, 2026
  permissions

  contextMenus, activeTab, storage, downloads

  (empty)

Permissions & access

Permissions

None declared

Host access

None declared