Local PDF tool - browser processing

Merge contract PDFs without uploading

Build one contract packet from multiple PDFs while keeping the documents in your browser.

Merge contract PDFs locally See the proof

0 bytes sent proof

What the widget measures

The panel counts what leaves your browser after you choose a file. The site's own scripts and fonts load like any web page — what you will never see is a request carrying your PDF. Check it here, or open your browser's Network tab and see for yourself.

0 bytes of your document sentStarts measuring when you choose a file on a tool page

Document request bodies: 0 bytes
App network after file open: 0 bytes
Processing engine: Browser WASM worker

The number is scoped to request bodies after you choose a document. App assets such as JavaScript, WASM, and fonts can still load; those are not your PDF bytes.

Verify it yourself

Open DevTools, then the Network tab.
Choose a PDF in the tool and complete the action.
Filter for fetch or XHR requests; document processing should not create a request carrying your file.

Stronger check: load the tool page first, then disconnect from the network before choosing the file. Already-loaded tool code can continue processing locally, but a first visit still needs the site assets.

Steps

How to do it in Lemmafour

Choose Merge contract PDFs locally.
Select the agreement, exhibits, schedules, and signed pages.
Put the cards in the final packet order.
Use page ranges to exclude cover emails or blank separator pages.
Optionally add section dividers, then merge and download the packet.

Expert note

Contract packet order

For contracts, the merge order can change meaning. Keep executed signature pages with the agreement they belong to, preserve exhibit labels, and check page numbering after export. If the source documents have digital signatures, merging may invalidate or visually preserve them without preserving certificate validity.

FAQ

Questions people ask before using this tool

Can I add section dividers?

Yes. The merge options include section divider pages and print-shop cover sheet settings.

Can I merge a signed PDF?

You can merge the visible PDF pages, but certificate signature validity may not be preserved after modification.

Should I keep originals?

Yes. Keep original contract PDFs separate from the merged packet.

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