Use case
How to process confidential documents safely online
You need to merge a contract, compress a financial report, or resize an ID scan. But you cannot upload it to a random website. Here is how to process sensitive files without any of them leaving your device.
This is not a policy — it is the architecture.
The problem
Most online file tools work by uploading your document to their server, processing it there, and sending back the result. They promise to delete the original afterward.
For everyday files this may be acceptable. But for contracts, payroll, medical records, financial reports, or any document with personal data — you are handing sensitive content to a third party and relying on their deletion policy. If their server is compromised, your document is exposed.
The solution: process locally in your browser
Filecraft processes files entirely in your browser. Your document never reaches Filecraft's servers.
- 1
Open any Filecraft tool — for example, Merge PDF or Compress PDF.
- 2
Drop your confidential file. It is read into your browser's memory.
- 3
Configure settings if needed (compression level, page selection).
- 4
Click the action button. Processing runs in your browser.
- 5
Download the result. Close the tab — the file is gone from memory.
Want proof? Open your browser's Network tab while processing. You will see zero file uploads. See the full verification steps