How It Works

Every tool on DocuKaro follows the same three steps. There is nothing to install and no account is needed.

1. Choose a tool

Search for the task — “compress pdf”, “resize photo” — or browse PDF Tools and Photo & Image Tools. Each category is grouped by what you want to do, such as Convert PDF or Compress & Resize.

2. Add your file

Drop the file onto the page or tap to choose it from your phone or computer. The tool opens the file in your browser. Adjust the options if you wish — page ranges, target size, output format and so on.

3. Download the result

Press the action button. When the result is ready, a download button appears. Your original file is never changed.

Where your files are processed

The PDF and image tools do their work on your own device, using JavaScript and WebAssembly libraries that are loaded with the page. Your files are not uploaded to our server for these tools. In practice this means:

• Processing starts immediately, without an upload wait.
• Speed depends on your device. Large files are faster on a computer than on an older phone.
• If you close or reload the page, the file is gone from the tool — nothing is kept.

The one exception: the Office conversion tools (PDF to Word, Excel and PowerPoint, and the reverse) work in the browser by default. The site owner can enable an optional cloud conversion engine for higher-fidelity results; when it is enabled, files submitted to those tools are sent to that provider for conversion. Our Privacy Policy explains this.

What the tools need

• A current version of Chrome, Edge, Safari or Firefox.
• JavaScript switched on.
• An internet connection to load the page. Some tools download an extra component the first time you use them — for example the text-recognition data for PDF OCR or the model for Background Remover.

Limits to be aware of

• Very large files may run out of memory on a phone.
• Browser-based conversion of complex Word, Excel and PowerPoint layouts is approximate.
• Password-protected PDFs must be unlocked (with the password) before most tools can read them.

More questions? See the FAQs or contact us.