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BunkerPDF

Nothing is uploaded. Ever.

PDF tools that never upload your files

Every one of the 21 tools runs inside your own browser. Free, no account, no watermark, and no file size limit beyond what your device can hold.

All 21 PDF tools

Merge PDFCombine several PDFs into one, in exactly the order you choose.Split PDFPull out single pages, custom ranges, or break a file into separate documents.Compress PDFShrink file size for email and uploads, with control over the quality trade-off.Organize PDFReorder, rotate and delete pages on a visual board.Rotate PDFTurn sideways or upside-down pages the right way up.Add Page NumbersStamp numbers onto your pages with control over position, format and starting value.Watermark PDFStamp text across your pages with adjustable angle, size and transparency.JPG to PDFTurn JPG and PNG images into a single PDF document.PDF to JPGTurn every page into a JPG or PNG image at the resolution you choose.Protect PDFEncrypt a PDF with AES-256 and control what readers are allowed to do.Unlock PDFStrip password protection from a PDF you have the password for.Crop PDFTrim margins or cut pages down to the part you actually need.Repair PDFRebuild a PDF that will not open, and recover what can be recovered.Sign PDFDraw, type or upload a signature and place it anywhere on the page.Redact PDFPermanently remove sensitive text and images, not just cover them.Compare PDFSee exactly what text changed between two versions of a document.PDF to MarkdownTurn a PDF into clean Markdown text for notes, docs and AI tools.Scan to PDFUse your phone or webcam camera to scan paper straight into a PDF.OCR PDFRecognise the text in a scanned PDF so it can be searched and copied.Fill PDF FormsDetect form fields and fill them in, then save the completed document.Edit PDFAdd text, images, shapes and freehand drawing to any page.

21

tools, all free

0

files uploaded

0

accounts needed

∞

files per day

Why processing locally matters

The usual trade-off — convenience for privacy — stopped being necessary years ago.

Your file never leaves your device

Other PDF sites upload your document to their servers, process it there, and promise to delete it later. Here there is nothing to delete, because nothing is ever sent. Check the Network tab while you use it.

No queue, no upload wait

Nothing travels over the wire, so there is no upload bar and no server queue. A large file is as fast as your own machine can read it — usually a second or two.

Keeps working offline

Once a tool page has loaded, the processing itself needs no connection at all. Pull the plug on your Wi-Fi and it still works.

How it works

Every tool here is a program that runs inside the browser tab you already have open. When you pick a file, the browser hands the page a reference to it on your own disk. The page reads the bytes into memory, rewrites them, and hands you back a new file — all on your machine, using your processor.

That is possible because of WebAssembly, which lets mature document libraries run at close to native speed inside a browser tab. It is the same software a desktop PDF editor would use, compiled to run on your machine without being installed on it.

The practical upshot is that the usual question disappears. You do not have to decide whether a contract, a medical record or a bank statement is sensitive enough to avoid a free web tool, because the question of who else can see it never comes up.

Do not trust us. Check.

Most privacy promises ask you to believe a company. This one is something you can verify in about thirty seconds, from your own browser.

Watch the Network tab

Open your browser's developer tools before running any tool. You will see the page and its code load — and after that, nothing carrying your document.

Pull the plug

Load a tool page, switch your Wi-Fi off entirely, then use it. It still works, because there was never a server involved.

Read the source

Every engine above is open source and linked. Nothing about how your file is handled depends on taking our word for it.

Built on open source

Four mature, openly licensed engines do the work — in your browser, not on a server.

No account. No file retention policy to read, because there are no files to retain.

Common questions

Is it really free?
Yes, and there is no account, no trial and no watermark on anything you produce. Every one of the 21 tools is fully functional. Because nothing runs on a server, the tools cost nothing to operate no matter how many people use them.
What is the file size limit?
There is no limit imposed by the site, because there is no server to impose one. The real ceiling is your device's memory — a browser tab can typically handle files of a few hundred megabytes. Very large documents work best on a desktop rather than a phone.
How can I verify nothing is uploaded?
Open your browser's developer tools before running a tool and watch the Network tab. You will see the page and its code load, and after that nothing carrying your document. For a stronger test, load the page, switch off your network entirely, and run the tool — it still works.
Which browsers are supported?
Any current version of Chrome, Edge, Firefox or Safari, on desktop or mobile. The tools rely on WebAssembly and the Canvas API, which all of them have supported for years.