About
Built for files you'd rather not upload.
Contracts, passports, tax records, family photos. Uploading them to unknown servers just to change a format has quietly become normal. TeraConvert exists so it doesn't have to be: every conversion runs on your device, start to finish.
Last updated:
The problem
Why file conversion deserves more trust.
Most online converters work the same way: you pick a file, it uploads to a server you know nothing about, and a download link comes back. Where the file goes, who can read it, and how long it sits on that server is rarely explained anywhere, and almost nobody stops to check before clicking. People convert signed contracts and passport scans this way every day, because the page looks clean and the button says Convert.
TeraConvert takes the opposite approach. There is no conversion server. The web app converts files inside your browser tab, and the desktop app runs native engines on your Mac, so nothing gets uploaded and there is nothing to leak or quietly keep. That is not a policy promise; it is how the software is built.
Principles
Rules that will not change.
Everything else about the product can change. These can't.
Local first
Conversions run in native engines on your Mac, or in your browser tab. Files never leave your device.
Pay once
TeraConvert is a one-time purchase, not a subscription. Buy Pro once and every future update is included.
Nothing leaves your device
Every conversion runs on your machine, so your files stay with you. Your first conversion is free to try before you buy Pro.
Honest about limits
A browser can't do everything a desktop can. When it hits a wall, TeraConvert says so instead of failing quietly.
Privacy over growth
A converter has no business reading your documents. There is no server that could; nothing about your files is collected or kept.
Technology
How TeraConvert is built.
None of the engines were invented here. TeraConvert wraps tools that have done this work for decades and keeps them on your device.
2026
The web app
TeraConvert started in the browser. Canvas, WebCodecs, and WebAssembly handle 200+ conversions inside the tab, with nothing uploaded.
Then
The desktop app
For heavier work, the macOS app drives native engines: FFmpeg, ImageMagick, Ghostscript, Pandoc, LibreOffice, Calibre, Tesseract, and the tools built into macOS itself. 800+ conversions run offline.
Now
Steady updates
Releases ship signed and notarized, and every future update is included for the lifetime of the app. The roadmap is boring on purpose: keep it working, keep it local.
The developer
Built by someone who cares where your files go.
Hi, I'm Yogendra.
I built TeraConvert because I was tired of sending personal files to online converters I didn't trust.
So I created a simpler alternative: privacy-first, local whenever possible, and focused on doing one job well.
If something isn't working or could be better, I'd genuinely like to hear from you.
Thanks for using TeraConvert.
Looking ahead
Software people trust with their files.
The goal is not to be the biggest converter on the internet. It is to be the one people trust with files that matter. That means more formats, limits stated plainly before you hit them, pricing that stays fair, and a product that keeps working for years because it is small enough to maintain and independent enough to keep its promises.
Questions, bugs, format requests.
One inbox, read by a person. If TeraConvert is missing a format you need, that is exactly the kind of email that shapes the next release.