Developer Builds Browser-Only File Converter That Never Uploads Your Data

A developer has launched Easy2Convert.xyz, a file conversion tool built with Next.js 14 that processes all files locally within the browser, sending zero data to external servers. The project was motivated by privacy concerns around free online converters, which often retain uploaded files beyond their stated deletion policies. It uses pdf.js, the HTML5 Canvas API, Web Workers, and WebAssembly to handle formats including HEIC and WebP entirely on the client side. Memory management was a key engineering challenge, with object URL cleanup and efficient Blob handling required to support files above 50MB. Service Workers enable the tool to function fully offline once assets are cached, making conversions possible even without an active internet connection.