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Dev.to
6/30/2026
The original title is 11 words: "I Tested 10 Online File Converters — None of Them Were Actually Private"

The original title is 11 words: "I Tested 10 Online File Converters — None of Them Were Actually Private"

Original: I Tested 10 Online File Converters — None of Them Were Actually Private

Short summary

Author tested 10 popular online file converters and discovered all upload files to remote servers—buried in privacy policies. They built browser-based alternatives (formlyapp.org, svg2png.org, webp2png.io) using Canvas API and FileReader that process locally. Existing web standards make privacy-first conversion practical today.

  • •All 10 tested file converters secretly upload files to remote servers
  • •Author built privacy-first browser-based alternatives using Canvas API
  • •Existing web standards make local-only processing practical today

Generated with AI, which can make mistakes.

#ai-tools#open-source
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