Frequently Asked Questions

duckdodoc is a free online platform that lets you process PDF and image files directly in your browser. We offer 16 tools including merge, split, compress, convert, rotate, watermark, and more — no installation required.

Yes. All 16 tools are completely free. No account or registration required.

No. All tools are free and no account is required. Simply upload your file, run the tool, and download the result.

We offer: Merge PDF, Split PDF, Compress PDF, Rotate PDF, Reorder Pages, PDF to Image, Image to PDF, Add Watermark, Protect PDF, Unlock PDF, Compress Image, Resize Image, Crop Image, Convert Image Format, Word to PDF, and PDF to Word.

Yes. Files are transferred over an encrypted HTTPS connection and processed on our secure servers. We do not read, analyze, or share the contents of your files with anyone.

Uploaded files and processed results are automatically deleted within 1 hour. We do not keep permanent copies of your documents.

No. Your files are processed automatically by our software. No human ever reads your files, and we never share them with third parties.

Yes. All communication between your browser and our servers uses HTTPS (TLS encryption). Your files are never transmitted over an unencrypted connection.

PDF tools accept .pdf files. Image tools accept .jpg, .jpeg, .png, .webp, .gif, and .tiff. Word conversion tools accept .doc and .docx files. Each tool's upload area shows exactly which formats it accepts.

For best performance we recommend files under 50 MB. Very large files (100 MB+) may take longer to process or time out depending on server load.

Yes, for tools that support it. Merge PDF and Image to PDF both accept multiple files at once. All other tools process one file at a time.

Common reasons include: the file is corrupted or not a valid PDF/image, the PDF is password-protected (use the Unlock PDF tool first), or the file exceeds the size limit. If the problem persists, please contact us.

For Compress PDF and Compress Image, quality is reduced intentionally to achieve a smaller file size. You can adjust the quality level in the tool's settings before running. For other tools, try using a higher-resolution source file.

Ads allow us to keep all tools free for everyone. We use Google AdSense to display non-intrusive advertisements. Without ad revenue, we could not cover the server costs of running this service.

You can opt out of personalized advertising by visiting Google Ads Settings at google.com/settings/ads. You can also use our cookie consent option to limit tracking.