Annotate and Sign PDF
Add visible content to PDF pages while keeping the original page content. Place overlays in the preview, adjust their position, and download the annotated copy.
Privacy and offline checks
Document processing runs locally in supported PDFForge workflows. This panel is a diagnostic view; it cannot prove that no data left the device.
Observed resource activity
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Page timing and the active service worker report different surfaces and may observe the same request. Worker activity can be incomplete; WebSockets, request bodies and extensions are outside this view. The latest 60 sanitized observations stay in memory only. URLs, filenames, query strings, document content and byte counts are not recorded here.
Verify independently in DevTools
- Use a clean browser profile and synthetic documents. Open Network in DevTools and enable Preserve log.
- Prepare offline below. Switch Network to Offline, then reload the saved workspace and select a new file.
- Inspect, redact, run output checks and download. Inspect failed requests and request payloads, including worker requests. A same-site request can still transmit data.
- Inspect Application or Storage. Cache Storage should contain public app assets and setup records only. Document recovery and content telemetry are disabled; recipe settings are saved only after opt-in.
Offline readiness
Full workspace not prepared for offline use
English OCR not prepared for offline use
Prepare while connected to save the workspace, tools, fonts and workers. English OCR is optional. Only public app assets are saved; documents, outputs and passwords are excluded. Browser storage can be cleared or evicted. Check saved assets before disconnecting and prepare again after an app update.
Checking saved app assets…
Open saved workspaceReady for local work · One heavy job at a time in this tab
Drop your PDF file here, or browse
Supports standard PDF documents • Up to 100 MB
Annotate and sign
Overlays add content; they do not remove hidden text. Visual signatures do not use certificates or establish identity. Editing may invalidate existing digital signatures.
Latin characters. For other scripts, upload an image. Export fits text inside its box.
0 / 200 overlays · Up to 300 pages · Original content stays in the PDF.
How it works
How Annotate and Sign PDF works
Add visible content to PDF pages while keeping the original page content. Place overlays in the preview, adjust their position, and download the annotated copy.
Guided steps
How to use Annotate and Sign PDF
- 1Choose a PDF from your device.
- 2Select a page and an annotation or visual signature type.
- 3Place the overlay in the preview and adjust its size or position.
- 4Review your additions and export the annotated PDF.
In this tab
What stays in this browser
The file stays in this tab.
- What this tool reads
- One PDF, text and placement settings you enter, and optional PNG/JPEG images or drawn, typed, or uploaded signatures.
- What the download contains
- A PDF with visible overlays added to page content. Existing content remains underneath. Overlays do not redact information or create certificate-based digital signatures. Existing digital signatures may be invalidated.
Questions
Annotate and Sign PDF FAQs
Is a drawn signature a digital certificate signature?
No. Drawn, typed, and uploaded signatures add a visible mark. They do not verify identity or provide certificate-based digital signing.
Can a highlight or text box hide sensitive information?
No. The original content stays underneath. Use PDFForge’s redaction tool when information must be removed.
Can I edit existing text or preserve a digital signature?
This tool adds overlays; it does not replace existing PDF text. Saving an edited PDF can invalidate existing digital signatures.
Continue locally
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