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Private PDF & Document Tools

Manage, convert, split, or merge your PDF documents securely. Running 100% locally on your computer, your files are never uploaded, keeping confidential records safe.

Universal File Converter: Private & Fast

Convert images, videos, audio, and documents directly in your browser. Your files never leave your device, ensuring 100% privacy and security.

Merge & Convert PDFs

Combine multiple PDF files or convert a PDF page to an image entirely in your browser.

Or select multiple PDFs to merge at once:

100% In-Browser Isolation Verified

Your files are processed strictly in local device memory. Stored zero bytes, audited zero network egress.

Verify Audit Protocol

How to convert files with DuckConvert

1

Select Your File

Choose the file you want to convert from your device or drag and drop it into the converter.

2

Choose Output Format

Select your desired output format and any specific settings for your conversion.

3

Convert & Download

Click "Start Conversion" and wait for the local process to finish, then download your new file.

Why Cloud-Based PDF Converters Pose a Severe Security Threat

Uploading files like scanned passports, contracts, banking statements, and legal agreements to traditional online PDF websites is highly insecure. Many services log file content, index text, and store items on unsecured clouds, risking corporate data leaks and identity theft. By executing all document logic inside your browser's sandboxed environment, DuckConvert provides absolute client-side privacy.

How Safe Browser-Native PDF Merging and Splitting Works

A PDF (Portable Document Format) is essentially structured as a tree of objects containing page tables, media resources, layout streams, and structural cross-reference tables. DuckConvert uses high-performance JavaScript engines like pdf-lib to read this tree structure from your selected file's local ArrayBuffer memory:

  • Local Parsing: The browser reads the raw bytes directly, verifying document headers and locating structural offset pointers immediately in RAM.
  • Page Mapping: Instead of re-rendering, we dynamically extract or clone page directories. When merging, we copy content references and append them into a clean, new document catalog.
  • Instant Export: The browser recompiles the internal structural indices and triggers an instant local download. Your files remain completely secure because there are no servers involved in the loop.

Zero-Server Text Layer Extraction (PDF to Plain Text)

When converting a PDF document to plain text (.txt), our program imports a localized WebAssembly worker instance of Mozilla's pdfjs-dist. This engine processes the document page-by-page, rendering the text layers in a virtual layout grid, mapping typography coordinates, and joining character strings sequentially into an indexable text file. This process is secure, incredibly fast, and runs fully offline.

Private PDF Tools FAQs

Yes, 100%. Traditional online PDF utilities require you to upload files to remote servers where they are stored, parsed, and logged. DuckConvert uses pure client-side libraries (like pdf-lib and pdfjs-dist) running inside your web browser. No files or text layers ever leave your local computer. Your bank statements, IDs, and tax documents remain entirely private.
Yes! Our local PDF merger handles documents with mixed orientations (portrait and landscape), various page sizes (Letter, A4, legal, etc.), and different resolutions. It perfectly aggregates pages and compiles them into a single, cohesive PDF without rendering artifacts or layout distortion.
No. Because our tools operate 100% locally in your browser memory, there are no artificial limits on the number of pages or files you can combine, extract, or split. Performance depends on your device's processor and RAM, allowing you to manage heavy, complex multi-hundred-page corporate files comfortably offline.
Using our Split PDF tool, you can input specific page numbers or custom page ranges (e.g., '1, 3, 5-8'). The browser will parse the document structure locally, extract the requested page nodes, copy the respective media streams, and assemble a new individual file for you to download instantly.

Explore More PDF & Document Utilities

Discover our suite of fully secure offline document tools running locally in your browser.

Merge PDFs

Combine multiple PDF documents into a single file.

Open Tool

Split PDFs

Split PDF pages into standalone documents or files.

Open Tool

PDF to Images

Extract pages from PDF files as JPG/PNG images.

Open Tool