Flatten PDF
Flatten PDF is for completed forms you want to lock visually. Field widgets are flattened with pdf-lib. Not every annotation appearance is guaranteed.
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
0 observations in this page session · 0 need inspection
Resource timing is unavailable in this browser. Use the independent checks below.
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
Private by design. Document processing runs in this browser. PDFForge has no document upload API.
How it works
How Flatten PDF works
Flatten PDF is for completed forms you want to lock visually. Field widgets are flattened with pdf-lib. Not every annotation appearance is guaranteed.
Guided steps
How to use Flatten PDF
- 1Select a PDF that contains AcroForm fields.
- 2Review that you want values baked into the pages.
- 3Flatten the form locally.
- 4Download the flattened PDF.
In this tab
What stays in this browser
The file stays in this tab.
- What this tool reads
- AcroForm fields on one PDF.
- What the download contains
- A PDF with field values burned into the pages.
Questions
Flatten PDF FAQs
Can I edit fields after flattening?
Filled values become page content. Recipients generally cannot type into those widgets anymore.
Are comments and markup fully flattened?
This tool focuses on AcroForm fields. Remaining annotations may still exist.
Does flattening encrypt the file?
No. Use Password Protect PDF if the flattened file also needs a password.
Continue locally
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