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Skip to contentHigh-contrast black & white conversion.
PDF tools in the browser save you from installing desktop software or uploading sensitive documents to unknown servers. Drag a file in, apply the change, and download the result in seconds.
Use this free PDF Black & White whenever you need a reliable result without creating an account or installing software. It loads in one click and works on desktop and mobile browsers.
Tentaco runs this tool in your browser whenever possible. Files you select are processed in memory on your device and are not uploaded to Tentaco servers for standard modes. Close the tab or clear the page after use on shared computers. Features that call external APIs (such as URL fetchers) only send the data required for that request.
High-contrast black & white conversion. Open the tool in your browser — no account or install required.
Yes — runs locally in browser.
No — processing runs locally in your browser. Your files and inputs do not leave your device unless the tool explicitly uses the network.