The hidden privacy risk of free online file converters

We've all been there: you have two PDF pages of a bank statement or a signed contract that you need to merge before sending an email. You Google "merge PDF free," click the first result, upload your files, and download the merged result.

But what happens to the files you uploaded?

The Data Broker Business Model

Providing fast, cloud-based file processing costs money. Server time isn't free. If a website is offering to process your files for free without asking for a subscription or showing an overwhelming amount of ads, you have to ask how they are making money.

In many cases, the files themselves (or the data extracted from them) are the product.

• Legal contracts contain names, addresses, and signatures.
• Bank statements contain financial histories and account numbers.
• Invoices contain customer lists and pricing data.

Even if a service claims "we delete your files after 2 hours," they rarely promise that they didn't run OCR (Optical Character Recognition) to scrape text from the document before deleting the original file.

The Solution: Local Processing

The only way to guarantee a remote server isn't reading your files is to never send them to a remote server.

This is why SAMAST's document tools are engineered to run entirely within your web browser using WebAssembly.