Combine contracts, exhibits, statements and scans into one file — without handing any of them to a server. Pages are copied byte-for-byte, so text stays selectable and nothing is re-compressed.
Think about what you actually merge: case exhibits, client financials, signed agreements, medical records. The most sensitive paperwork you handle — and every "free merge tool" wants you to upload all of it to their server first.
BlackoutPDF assembles the combined file inside your browser tab. Pages are copied directly from the source PDFs — original fonts, vectors, and text layers intact — into a brand-new document. Nothing is rasterized, nothing is uploaded, nothing is "deleted after 2 hours."
Turn off your Wi-Fi after the page loads. It still merges. That's the whole proof — your documents never leave the room.
Each PDF is parsed in your browser's memory. No bytes go out.
Pages you selected are copied losslessly into a new document, in your order.
The merged file downloads straight from memory. Text stays selectable.
Adobe Acrobat Pro $19.99 / month · Smallpdf Pro $9 / month · iLovePDF Premium $6.61 / month
BlackoutPDF Pro $19 / year (everything) · Team $99 / year — still a fraction of Acrobat, and your documents never leave the room.
Yes. Pages are copied directly from your source files into the new document — no re-rendering, no image conversion, no quality loss. Fonts, vector graphics, links within a page, and the text layer all survive, so the merged file is just as selectable and searchable as the originals.
Yes — each file row has an optional page-range field. Type something like 1-3,5 to take pages 1 through 3 plus page 5, in that order. Leave it blank to include every page. Invalid ranges are flagged in red before you export, naming exactly what's wrong.
Encrypted PDFs can't be read without their password, so we'll tell you — by filename — which file is locked and skip it. Unlock it in your PDF viewer first (open it, enter the password, save a copy), then drop it back in. We never ask for, see, or transmit your passwords.
The only limit is your device's memory, because that's where all the work happens. Hundreds of pages across a dozen files is routine on a normal laptop. The free tier caps the merged output at 10 pages; Pro — $19/year — removes every limit on every tool AND unlocks every feature, including Bates stamping, on all your devices. Team — $99/year — covers your whole team with one license key. Prefer not to subscribe? A one-time $49 Pro Lifetime license unlocks everything forever — no recurring charge.
Bates stamping — a Pro feature — prints a sequential identifier (BATES-000001, BATES-000002, …) on the bottom-right corner of every page of the merged file, the way legal and records teams label exhibits and discovery sets. You choose the prefix and the starting number, and the count runs continuously across the whole merged document. The stamps are drawn by the same in-browser engine that does the merging, so nothing changes about privacy: your documents still never leave your machine.
Where your browser supports the new WebMCP standard (navigator.modelContext — Chrome and Edge today), an AI agent can drive this page: read the queued files, merge them, and download the result — calling the same in-tab actions the buttons do. You add the files yourself, and they never leave the tab. On browsers without WebMCP the feature isn't present. There is no agent API that uploads your documents, by design.
The free tier covers merged output up to 10 pages. Pro unlocks unlimited everything for less than one month of any competitor's subscription.
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