Privacy
Your files stay on your device.
Deckle processes your PDFs in your browser. The files are not uploaded to a server, and you do not need an account.
Where your files are processed
When you add a file, your browser reads it from your device. Merging, splitting, converting, compressing, OCR and every other tool run as code inside the browser tab, in background workers on your own processor.
The bytes of your document are not sent to Deckle or to any other service to be processed. That is the main difference from most online PDF tools, which upload the file, process it on their servers and send it back.
What does use the network
Deckle is a website, so your browser still downloads the site itself: pages, scripts, fonts, and the processing engines a tool needs, such as the OCR engine or the image decoders. Some of these load the first time you open a tool.
Like any website, the servers that deliver Deckle receive ordinary web requests, which include details such as your IP address, browser and the page you asked for. Those requests do not contain your documents, their contents or your passwords.
What is stored on your device
Documents you open, and the results you create, are kept in your browser's private storage for this site. This lets a reload or a closed tab come back to the same work. Other websites cannot read that storage.
Close a document to remove it. Clearing this site's data in your browser settings removes everything Deckle has stored. Downloads are separate files in your own folders and are not affected.
Browser storage is not a backup. The browser may clear it when space runs low, so download anything you want to keep.
Passwords and sensitive details
Passwords you type into Protect PDF or Unlock PDF are used to encrypt or open the file on your device. They are not saved and are not sent anywhere.
Values found by Redact PDF, such as account or card numbers, stay in the tab. The record of changes Deckle keeps for each document notes which tool ran and what it measured, not the content of your pages or your passwords.
Why it matters for PDFs
PDFs are often the documents people least want to hand over: contracts, payslips, bank statements, scanned passports, medical letters. With an upload service you rely on its promise to delete the file after an hour or a day. With Deckle there is no server copy to delete, because none is made.
It also means the file does not have to travel. A large scan does not wait on an upload before work starts, and the result does not wait on a download from a server.
No account
You can use every tool without signing up or giving an email address. There is nothing to log in to, so there is no profile of the files you have worked on.
What this does not cover
Local processing keeps the file away from a server. It does not remove private information inside the file. A PDF can carry an author name, editing history, attachments or hidden text. Use Remove PDF metadata for document properties, and Redact PDF to remove visible details for good.
Anyone with access to your device and browser profile can reach what is stored for this site. On a shared computer, close your documents and clear the site's data when you finish.
Browser extensions you install can read pages you visit, including this one. That is outside Deckle's control.