Vastus. Vast. A growing family of tools that stay where they belong — on your device.
Vastiko is built on a simple architectural choice: every tool runs entirely in your browser, so your files never have to leave your device to be useful.
The problem
Every time you used an online PDF editor, image converter, or spreadsheet tool, you uploaded the file to a stranger's server. Then you trusted them to delete it. Then you trusted them not to read it. Then you trusted them not to get hacked.
That trust chain is the only thing standing between your file and someone else's curiosity. For an invoice, a passport scan, a contract, or a medical record, that's a lot of trust to place in an HTTPS handshake and a privacy policy.
The choice
Modern browsers can do everything those servers do — render PDFs, edit text, decrypt files, compress images, recognize faces, extract tables — using the device you already own. The only reason most tools still upload your files is that they were built before browser APIs caught up.
Vastiko is built around the modern reality. Every tool runs in your browser tab. We have no upload pipeline, no temporary storage, no servers that touch your files.
No upload
Files are processed inside the browser tab using JavaScript and WebAssembly.
No account
Use any tool without registering. Nothing tied to you across sessions.
No tracking of file content
We see anonymous page-view counts. Your file content is irrelevant to that.
The name
Vastiko comes from vastus — Latin for vast, immense, expansive. The plan is to build a vast family of tools that share one principle: your data should never have to leave your device to be useful.
Who runs Vastiko
Vastiko is operated by an independent developer registered as an OSVČ (self-employed sole trader) in the Czech Republic. There is no team page yet because there's no team yet — just careful engineering and an ambition to keep the user's data on the user's device.
If you'd like to contribute, partner, or report a bug, the most direct channel is email: info [at] vastiko [dot] com.