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AttachKit browser extension

Open the PDF in your current tab in AttachKit with one click. The extension fetches the bytes in your browser, opens AttachKit, and passes them via postMessage. No upload, no third-party server.

Install

The browser extension is in private beta — it isn't on the Chrome Web Store yet, and the source isn't public. Want early access? Request an invite and we'll send you the unpacked build plus load-it-yourself steps.

Once installed, open any PDF in a tab (Chrome's built-in viewer works), click the AttachKit toolbar icon, and pick Sign, Fill, Redact, or Make searchable.

What it can do

  • Sign this PDF — opens the PDF in the Sign tool with your signature library ready.
  • Fill this PDF — opens it in the Fill tool so you can auto-fill from your saved profile.
  • Redact PII — opens it in the Redact tool to scan + black out sensitive text.
  • Make searchable (OCR) — runs OCR on a scanned PDF and writes an invisible text layer underneath.

Privacy posture

The extension requests <all_urls> host permission so it can fetch PDFs from any origin (the popup, not the page you're visiting). The extension does not phone home, does not collect analytics, and does not send the PDF to any remote server. Bytes go from the source tab → the extension → the AttachKit tab, all within your browser process.