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Dev.to
6/16/2026
Your PDF Tool Is Probably Uploading Your Files — Here's How to Check

Your PDF Tool Is Probably Uploading Your Files — Here's How to Check

Short summary

A security audit of 10 popular PDF tools found that 9 upload files to external servers, potentially exposing sensitive data like tax returns, medical records, and financial statements. Users can verify this vulnerability themselves using Chrome DevTools to monitor network POST requests during file uploads. Browser-based WebAssembly processing offers a secure alternative that performs compression, merging, and conversion entirely locally without server exposure.

  • •9 of 10 popular PDF tools upload files to external servers, exposing sensitive documents
  • •Users can inspect this using Chrome DevTools Network tab to verify their own tools
  • •WebAssembly-based processing keeps files entirely local with zero server exposure

Generated with AI, which can make mistakes.

#ai-tools#open-source
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