Every time I needed to convert an iPhone .HEIC photo, merge PDFs, or convert a CSV to Excel, online tools forced me to upload private files to their cloud servers and hit me with a "Max 3 files per day" paywall.
With modern browser APIs, uploading files to a backend server just to convert formats isn't necessary anymore. So I built ZeroConvert:
🔗 Live Tool: https://getzeroconvert.com
How It Works Under the Hood
- Images (HEIC, WebP, AVIF, PNG, JPG): Processed locally using HTML5 Canvas and client-side decoding buffers.
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Documents & PDFs: Merged and converted in local RAM via
pdf-libandpdfjs-dist. - Spreadsheets & Data (XLSX, CSV, JSON, XML): Parsed instantaneously in the browser using SheetJS.
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Audio & Video (MP4, MP3, WAV, WebM): Powered by
FFmpeg.wasmrunning inside Web Workers.
Because there are zero server uploads, conversions happen at native memory speed with 100% privacy and zero daily caps.
Would love for you to test it out and let me know what formats or features I should add next!
