What is WebAssembly?
WebAssembly (abbreviated WASM) is a binary instruction format that runs in modern browsers at near-native speed. Originally developed by major browser vendors (Google, Mozilla, Apple, Microsoft), it's now a W3C standard supported by over 95% of browsers. ConvertiZen compiles professional-grade conversion libraries (like LibreOffice components, FFmpeg, and Sharp) to WASM, making them run locally in your browser tab.
Why this matters for privacy
Traditional cloud converters send your file to a server for processing. With WebAssembly, ConvertiZen processes your file client-side — there's no server involved in the actual conversion. Your PDF, Word, or image file never leaves your device. This makes ConvertiZen ideal for converting sensitive documents: medical records, legal contracts, financial statements, or any private data.
FAQ
Is ConvertiZen really free?
Yes, 3 conversions per day with no account. Premium (€4.99/month) gives unlimited conversions.
Are my files uploaded to any server?
No. All conversions run locally in your browser via WebAssembly.
Does it work on mobile?
Yes, compatible with iPhone and Android.
Is there a file size limit?
10 MB free, 100 MB with Premium.
Do I need to install any software?
No, ConvertiZen runs in any modern browser.