Home / Offline PDF editor
A PDF editor that works with no internet connection
Load the editor once and it keeps working with the network disconnected — on a plane, in a secure facility, or anywhere with no signal. You can also install it to your desktop or home screen, or save the page to your disk, and it runs with no installer and no internet at all.
"Offline" usually means one of two disappointing things: a desktop program you have to install and update, or a web app that shows you a spinner and a friendly apology. This is neither.
Because all the processing happens in your browser, there is nothing for a connection to be required for. Once the code has arrived, the network has no further role.
Use it with no connection
Two routes, depending on how offline you need to be.
Route one: load it, then disconnect
Visit the editor once while online. A service worker caches the application. Disconnect, close the tab, come back later — it still opens and still works.
Install it to your home screen
On desktop or mobile, use your browser's install option. It opens in its own window like a normal application and launches offline.
Route two: save the page itself
With the editor open, use your browser's Save Page As and choose the complete web page option. What lands on your disk is a working copy of the editor.
Open it from anywhere
Double-click the saved file. It opens in your browser from your own disk and works fully, with no internet, no installer, and no administrator rights.
Keep it or pass it on
Put it on a USB stick or a network share. Every copy is self-contained and cannot phone home, because there is nowhere for it to call.
Where this actually gets used
- On a flight — the classic case. Sign, stamp and reorganise a bundle at 35,000 feet with no wifi purchase involved.
- In air-gapped and restricted environments — facilities where machines have no internet access at all. A single HTML file on an internal share is often the only route to a PDF editor that clears review.
- Where the connection is unreliable — field sites, clinics, ships, remote offices. Uploading a 40 MB scan over a weak link is painful; doing the work locally is instant.
- Where IT will not approve installs — no installer, no service, no registry changes, no admin rights. It is a document your browser opens.
Keeping a copy
Two ways, and neither needs an installer.
Install it. Use your browser's install option and the editor gets a home-screen or Start-menu entry, opens in its own window, and launches with no connection. This is the route most people want.
Save the page. With the editor open, Save Page As with the complete-page option puts a working copy on your disk that you can carry on a USB stick.
Either way the point is the same: the tool becomes something you possess rather than something you visit. If this website disappears tomorrow, your copy keeps working exactly as it does today — a stronger guarantee than any uptime promise we could make.
A single self-contained HTML build, small enough to email, is on the roadmap. It is not published yet, and we would rather say that than link you to a file that does not exist.
For IT teams
A tool that makes no outbound connections is unusually easy to approve. Host the folder on an internal server and everyone in the building has a PDF editor with no data path out of the organisation. There is no licence server, no telemetry, no update mechanism to police, and no vendor account to administer. The Content Security Policy blocks cross-origin transmission at the browser level, so the property is verifiable rather than asserted. Your own team can verify the behaviour directly: check the response headers, watch the network tab during a real edit, or simply disconnect the machine and confirm it still works.
Try it — there is nothing to sign up for.
Open the editor and drop a PDF in. Your file stays on your device, and you can take the whole thing offline whenever you want.
Straight answers
How does it work offline if it is a website?
A service worker caches the application files in your browser the first time you visit. After that the browser serves them from your own disk. Since the PDF work was always happening locally, there is nothing else the network was needed for.
How big is the single file?
Around two megabytes — smaller than most PDFs you will open with it. That includes the entire interface and both PDF engines.
Will my stamps and workflows still be there offline?
Stamps are saved in your browser's local storage on your own device, so yes. Workflows are files you save wherever you like and import when you need them — they never depended on a connection either.
Does the offline version have fewer features?
No. It is the same application, built from the same source. The only difference is that everything is inlined into one file instead of being served as several.
Can I put it on a USB stick?
Yes. Copy the HTML file across and open it on any machine with a browser. Nothing is installed and nothing is left behind on the host computer.