Frequently asked questions

Yes — every tool is free with no daily limit, no watermark, and no premium tier. The site is supported by ads, not subscriptions.

No. Every tool works immediately, with no sign-up, email, or login required.

Most tools process your file entirely in your browser, so we never see or store it. A few tools work differently by necessity — the URL Shortener, Image-to-Text's default cloud OCR mode, and the Translate feature (which sends only the text you're translating, not your file) — and each says so plainly on its own page. Nothing is stored longer than needed to complete the task.

Yes, every tool is fully responsive and works on phone, tablet, or desktop browsers.

No installation is needed — everything runs inside a normal browser tab.

No. ConvertKoro doesn't add watermarks to any file you download.

You need internet to load the page the first time. After that, most tools continue working offline since processing doesn't depend on a server.

For tools that process entirely in your browser, yes — your document never leaves your device. A small number of tools (URL Shortener, Image-to-Text's default mode, and the Translate feature) send data to a server, so for anything highly sensitive, check that specific tool's page first, or use the on-device alternatives where available.

For browser-based tools, nothing is retained — files exist only in memory while the tab is open. For the few tools that use a server, files are processed and not kept afterward.

We don't enforce a hard limit. In practice, very large files are limited by your own device's available memory, not by us.

The PDF Compressor — it works best on scanned or image-heavy PDFs, where re-encoding each page saves the most space.

Use PDF to Image to export every page as a PNG or JPG.

Image to PDF handles mixed formats; JPG to PDF is a faster path if everything is already a JPG.

Use the PDF Splitter and enter the page numbers or range you need.

They use standard, widely-used formulas and, for currency, live exchange-rate data. Treat every result as an estimate for planning purposes, not professional medical or financial advice — see our Terms of Service for details.

Yes, just to fetch current exchange rates when the page loads — that's the one tool on ConvertKoro that talks to an external service. No personal data is sent, just a request for today's rates.

Video tools download a real video-processing engine (about 25MB) to your browser the first time you use one — it's cached after that, so future visits are fast. Audio-only tools don't need this and work instantly.

No hard limit is enforced, but very large videos take longer to process and use more of your device's memory, since everything runs on your own hardware rather than a server.