Page Capture

Page Capture is a Chrome Manifest V3 extension for capturing full pages or scrollable areas, then saving PNG, image PDF, or native selectable-text PDF output.

It supports scroll-stitch image captures, scrollable element captures, a minimal editor/export workflow for raster exports, and a native Chrome PDF mode for text-selectable page output.

Features

• Capture a full page by scrolling and stitching rendered slices.
• Capture a scrollable element by auto-detecting a container, dragging a rectangle, or selecting an element.
• Save a native full-page PDF through Chrome's print pipeline so text can remain selectable where Chrome prints it as text.
• Edit raster captures with crop, draw, shape, erase, and text tools.
• Export edited captures as PNG, paged PDF, continuous PDF, or detected document pages.
• Redact common sensitive fields and custom CSS selectors before capture.

Install Locally

1. Open chrome://extensions.
2. Enable Developer mode.
3. Click Load unpacked.
4. Select the extension/ folder.

If Chrome reports Manifest file is missing or unreadable, the repo root was probably selected by mistake. Load extension/, not the top-level project folder.

Development

Prerequisites:

• Node.js 22 or a compatible current Node.js version.
• npm.
• Google Chrome or Chromium.

Install dependencies:

npm ci

Run checks:

npm run test:syntax
npm run test:browser
npm audit --omit=optional

Run the same checks as CI:

npm run test:ci

Project Layout

Path	Purpose
extension/	Chrome extension source loaded by Chrome.
extension/manifest.json	Manifest V3 metadata, entry points, icons, and permissions.
extension/background.js	Service worker and capture orchestration.
extension/content.js	Page-side capture, scrolling, selection, and redaction logic.
extension/offscreen.js	Offscreen canvas/PDF export runtime.
extension/editor.*	Editor UI and interaction logic.
extension/popup.*	Popup UI and capture settings.
extension/lib/	Shared core and UI helpers plus vendored jsPDF.
extension/fonts/	Vendored Poppins font assets.
extension/tests/	Extension-internal browser test harness.
tests/browser/	Playwright tests that load the unpacked extension.
docs/	Technical documentation and release notes/checklists.

Permissions

The extension intentionally avoids broad host permissions and does not request <all_urls>.

Current permissions:

• activeTab: capture the active page after the user starts capture.
• debugger: required by Chrome for native PDF export through Page.printToPDF; this cannot be optional in Manifest V3.
• scripting: inject the content script when capture starts.
• storage: store local extension settings.
• downloads: save generated files.
• offscreen: render and export captures in an offscreen document.

Documentation

• Codebase documentation
• Release checklist
• Security policy
• Contributing guide
• Third-party notices

Publication Notes

• Do not commit packaged extension archives, private keys, certificates, local .env files, Playwright reports, or generated test results.
• Choose and add a project license before accepting outside contributions.
• Review the manifest description, permissions, icons, and screenshots before creating a GitHub release or Chrome Web Store submission.

License

No open-source license has been selected yet. Until a license is added, the default copyright restrictions apply.