File conversion that stays with you.
Convertify is a free, browser-based file converter. PDFs, images, audio, video, documents, JSON, YAML, CSV — all transformed locally on your device. We can't see what you converted because we never receive your files.
Why we built it
Search "HEIC to JPG online" and you get a dozen sites that all want your photo on their server. Half of them inject ads or watermarks. Most don't tell you what they keep. None of them work offline.
Browsers have shipped WebAssembly for years now. The same image, audio, and document libraries that power Photoshop, FFmpeg, and Pandoc can run in a tab. So we put them there — and built the only converter you actually need to bookmark.
How it works
1. Drop a file
Browser reads it into memory. Never sent to a server.
2. WASM converts
ImageMagick, FFmpeg, pdfjs all run in your tab via WebAssembly.
3. You download
File goes straight to your downloads folder. Nothing logged.
What we collect
- Account emailwhen you sign in (Supabase magic link). That's it.
- Conversion counts — the type (e.g.
md_pdf) and the input/output size in bytes. Never the file content. - Page views via Vercel Analytics (no cookies, no fingerprinting).
See the full privacy policy.
Built with
- Next.js 16 + React 19
- Tailwind v4 + shadcn/ui
- ImageMagick WASM (30+ image formats)
- FFmpeg WASM (audio + video)
- pdfjs (PDF parsing)
- marked + DOMPurify (Markdown)
- Supabase (auth + DB)
- LemonSqueezy (Pro subscriptions)
A solo project
Convertify is built by Asnari Pacalna. Free tier supported by ads + occasional Pro subscribers. If you want to support the project: tell a friend, write a review, or go Pro.