PDF Master

How our tools work

PDF Master has three types of tools. Each handles your files differently. Here's exactly what happens — so you can make an informed choice.

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Private tools (22 tools)

Private

These tools process your files privately. Your files are never uploaded — they stay on your device, so nothing is ever transmitted to us.

How it works

  1. 1You select your file(s) — they stay on your device.
  2. 2The tool processes your file securely without uploading it.
  3. 3The result is offered for download straight away.
  4. 4No file data is transmitted to our servers at any point.
shieldMaximum privacy. No data leaves your device.

Examples

Merge PDFSplit PDFRotate PDFWatermark PDFCrop PDFAdd Page NumbersFill PDF FormCompress PDF (light)Edit Metadata
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Secure-upload tools

Secure upload

Some operations need extra processing power to complete — such as Office conversions, compression, encryption, and OCR. For these, your file is securely uploaded and processed.

How it works

  1. 1Your file is uploaded securely.
  2. 2Your file is processed securely.
  3. 3The output file is returned to you for download.
shieldYour files are handled securely and kept private.

Examples

PDF to WordWord to PDFPDF to ExcelCompress PDF (heavy)Protect PDFUnlock PDFOCR PDFRedact PDF
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AI tools (5 tools)

AI-powered

AI tools extract the text from your PDF and send it to the Anthropic Claude API. This means the text content (not the binary file) is transmitted to Anthropic for AI processing.

How it works

  1. 1Text is extracted from your PDF.
  2. 2The extracted text is sent to the Anthropic Claude API.
  3. 3Claude processes the text (summarise, translate, extract, etc.).
  4. 4The AI response is returned to you. We do not retain your text.
shieldText content is processed by Anthropic. Do not use with strictly confidential documents.

Examples

AI SummariserChat with PDFAI Translate PDFAI Extract DataAI Question Generator

Common questions

How do I know how a tool handles my file?expand_more
Every tool page tells you whether your file stays on your device or is uploaded securely, so you always know before you start.
Can I use the private tools offline?expand_more
Once the tool page has loaded, most private tools keep working without an active internet connection, since your file is processed without being uploaded.
What happens to my file when it's uploaded?expand_more
When a tool needs to upload your file, it is handled securely and kept private. We don't keep copies of your documents.
Does Anthropic train on my data?expand_more
PDF Master uses the Anthropic Claude API with data-processing terms that restrict training on API inputs. Anthropic's API usage policy prohibits using API inputs for model training without explicit consent.