Merge PDF
Use Merge PDF when you need a single packet from separate documents. Files stay in this tab, keep their original page sizes, and download as one PDF.
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 PDF files here, or browse
Supports standard PDF documents • Up to 100 MB
Arrange the files in the order shown, then combine them into a single PDF.
Private by design. Document processing runs in this browser. PDFForge has no document upload API.
How it works
How Merge PDF works
Use Merge PDF when you need a single packet from separate documents. Files stay in this tab, keep their original page sizes, and download as one PDF.
Guided steps
How to use Merge PDF
- 1Add two or more PDF files from your device.
- 2Reorder them with the move buttons if the sequence is wrong.
- 3Choose Merge PDFs and wait for local processing to finish.
- 4Download the combined PDF, then clear the session if you are done.
In this tab
What stays in this browser
The file stays in this tab.
- What this tool reads
- The PDF files you drop, in the order shown.
- What the download contains
- One combined PDF.
Questions
Merge PDF FAQs
Does merging upload my PDFs?
No. Merge PDF reads files with the browser File API and builds the result in a same-origin worker on this device.
Can I mix page sizes in one merged file?
Yes. Each source page keeps its own dimensions. Letter, A4, and custom sizes can sit in the same output.
What happens if a file is password-protected?
Merge PDF rejects encrypted files with a clear error. Unlock that file first if you know the password.
Continue locally
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