Every time you use an online PDF converter, your file travels to a server somewhere — processed by a company you don't know, stored temporarily on hardware you don't control.
For a random meme? Fine. For a payslip, a contract, or a medical document? That's a real privacy problem.
What I built
ConvertiZen is a document converter that runs 100% in the browser using WebAssembly and modern JS APIs. Your file never leaves your device. Ever.
Verify it yourself: open DevTools > Network tab > run a conversion. Zero outgoing requests containing your file data.
What it supports
40+ format pairs:
- PDF ↔ Word, JPG, PNG, Text, HTML, Markdown
- Excel ↔ CSV, JSON, HTML
- Images: JPG ↔ PNG ↔ WebP, GIF/BMP → PDF
- JSON ↔ CSV, Markdown ↔ HTML, XML → JSON
How it works
PDF.js for PDF parsing
docx library for Word generation
SheetJS for Excel/CSV
Canvas API for image conversions- Everything client-side — no server required
Pricing
3 free conversions/day, no account needed. Beyond that: €0.69/conversion, €4.99 for a pack of 10, or €4.99/month for unlimited Premium.
Feedback welcome
What formats are missing? What would make you trust a browser-based tool over a server-based one?
👉 https://convertizen.netlify.app
SOCIAL SHARE CARD GENERATOR