Question 1

Is Thundocs completely free?

Accepted Answer

Yes. All PDF tools on Thundocs are 100% free with no hidden fees, no subscriptions, and no file size limits enforced by uploads. There are no watermarks added to your documents.

Question 2

Does Thundocs upload my files to a server?

Accepted Answer

No. Thundocs processes all files entirely in your browser using WebAssembly and JavaScript. Your PDF files never leave your device and are never uploaded to any server.

Question 3

Do I need to create an account to use Thundocs?

Accepted Answer

No account is needed. All PDF tools on Thundocs work instantly without signing in, creating an account, or providing any personal information.

Question 4

What PDF tools does Thundocs offer?

Accepted Answer

Thundocs offers 20+ PDF tools including: Merge PDF, Split PDF, Compress PDF, PDF to Word, PDF to Excel, PDF to PowerPoint, PDF to JPG, JPG to PDF, Word to PDF, Excel to PDF, PowerPoint to PDF, OCR PDF (text extraction from scanned documents), Protect PDF, Unlock PDF, Rotate PDF, and Watermark PDF.

Question 5

How does Thundocs compress PDFs?

Accepted Answer

Thundocs compresses PDFs by re-encoding images within the PDF at optimized quality settings and removing redundant metadata, all processed locally in your browser using pdf-lib and custom compression algorithms. No data is sent to any server.

Question 6

Can Thundocs extract text from scanned PDFs?

Accepted Answer

Yes. Thundocs includes a free OCR (Optical Character Recognition) tool powered by Tesseract.js that runs entirely in your browser. It can extract text from scanned PDFs and images without uploading any files.

Question 7

Is Thundocs available in multiple languages?

Accepted Answer

Yes. Thundocs is available in 24 languages including English, Spanish, French, German, Italian, Portuguese, Japanese, Hindi, Russian, Korean, Chinese, Arabic, and more.