FernPDF
Your files never leave your device

Every PDF tool you need, nothing leaves your device.

Merge, compress, convert, sign and edit PDFs in seconds. Everything runs privately in your browser: no uploads, no waiting, no trace.

Drop a PDF to get started
Choose a tool next, or just drop and we’ll suggest one
No upload · processed locally · auto-deleted
No account neededEnd-to-end encrypted100% browser-basedPrivate by design
01 · Most used

The tools people reach for daily

Eight of our most popular tools. Every one runs locally: open it, drop a file, done.

02 · Every category

A complete PDF toolkit

From everyday organizing to AI-powered intelligence: 30+ tools, one private workspace.

03 · Why FernPDF

Privacy that doesn’t cost you speed

Most PDF sites upload your files to their servers. We never do, and it’s actually faster.

Your files never leave your device

Every operation runs locally with WebAssembly. We can’t see your documents, store them, or leak them, because they never touch a server. Close the tab and they’re gone.

0 bytes uploaded

Instant results, no upload wait

Because there’s no round-trip to a server, conversions start the moment you drop a file. A 200-page merge finishes before a typical uploader would even finish uploading.

~0.4s avg start

Privacy you can verify, not just trust

Processed entirely in your browser, so there's no server copy to breach and nothing to leak. No account required for the core tools, and you can confirm it yourself in the network tab.

No server copy

Chat, summarize & translate, on demand

Ask questions across hundreds of pages, pull tables into a spreadsheet, or translate a contract. AI features run on encrypted, ephemeral sessions you control.

12 languages
100%
In your browser
0
Bytes uploaded
10+
Free PDF tools
$0
No account needed
04 · Who it's for

Built for documents that can't leave the building

Legal & compliance

Nothing a server could leak

NDAs, contracts, and privileged files are processed in your browser and never uploaded, so there's nothing on a third-party server to breach, subpoena, or hand over.

NDAsContractsFilings
Finance & deals

Board decks that stay in the room

Merge, split, and compress diligence packs and financials in-tab. Close the page and the file is gone from memory: no account, no upload, no trail left behind.

Board decksDiligenceStatements
Healthcare & HR

Records that never cross a border

Patient and employee documents stay on the device, which keeps the data clear of cross-border transfer rules, because it simply never moves off your machine.

Patient recordsPayrollOnboarding
05 · Questions

Everything you might ask

Still curious? Read how local processing works, or reach our team (humans, not bots).

Correct. FernPDF processes PDFs entirely in your browser using WebAssembly. Your documents are never transmitted to or stored on our servers. You can verify this in your browser’s network tab: you’ll see zero file uploads.

There is no hard cap. Because processing is local, the practical limit is your device’s memory, and most laptops comfortably handle 500+ page documents.

No. Every tool works without signing up, and there is nothing to sign up for: your files, preferences, and history stay in your browser, on your device.

Today the assistant reads and indexes documents entirely on your device; nothing is sent anywhere. Cloud-powered summaries and chat are labeled “coming soon” and will be strictly opt-in when they ship. You can disable AI features entirely in settings.

Yes. Once loaded, most tools work without a connection. Install FernPDF as a desktop app (PWA) and merge, split, and compress on a plane.

Start working on your PDFs privately

Free for core tools. No account, no upload, no catch.