8 min read
Best private PDF workflow: merge, compress, encrypt
A repeatable on-device pipeline: clean pages → merge → compress if needed → password-protect the outbound file.
Read guidePrivate · No account · Local processing
PDF tools that stay in your browser
Merge, compress, split, convert, and organize PDFs without accounts, uploads, or tracking.
Organize & Optimize
Merge, split, compress, reorder, and clean up PDFs.
Merge PDF
Combine multiple PDFs into one file in seconds.
Compress PDF
Shrink PDF file size while keeping it readable.
Split PDF
Extract pages or split a PDF into separate files.
Organize Pages
Reorder, rotate, and delete PDF pages visually.
Rotate PDF
Rotate pages 90°, 180°, or 270° in a click.
Crop & Resize
Crop margins or resize PDF page dimensions.
PDF to ZIP
Package PDF pages or files into a ZIP archive.
Repair PDF
Rebuild damaged or corrupted PDFs so they open again.
PDF to PDF/A
Best-effort PDF/A-1b stamp and cleanup — not a certified archive file.
Read & View
Open and read PDFs right in your browser.
Edit & Annotate
Watermarks, page numbers, redaction, signatures, and more.
Edit PDF & Signature
Add text and signatures to PDFs.
Redact PDF
Black out regions by rasterizing pages — text and forms are destroyed.
Add Watermark
Stamp text watermarks across pages.
Page Numbers
Insert customizable page numbers.
Headers & Footers
Add running headers and footers to every page.
Flatten PDF
Rasterize pages so forms and annotations become flat images.
Invert PDF Colours
Invert page colours by rasterizing — the result is image-only.
Convert to PDF
Turn images, documents, and markup into PDF files.
Word to PDF
Convert Word documents to PDF privately.
Images to PDF
Combine JPG, PNG, and WebP images into one PDF.
Excel to PDF
Export spreadsheets to PDF format.
HTML to PDF
Capture HTML as bitmap pages (html2canvas), not print CSS.
Create PDF
Write a document and export it as a PDF.
Markdown to PDF
Export Markdown notes to a polished PDF.
CSV ↔ PDF
Convert tables between CSV and PDF.
Scan to PDF
Turn camera photos into a clean PDF — auto-cropped and straightened.
Convert from PDF
Export PDFs to images, text, office formats, and more.
PDF to Word
Rebuild a .docx from extracted text — fine for notes, not a layout clone.
PDF to JPG
Export each PDF page as a high-quality JPG.
PDF to Excel
Export extracted text and simple gap-split tables to Excel.
OCR PDF
Turn scanned PDFs into searchable, selectable text.
PDF to HTML
Rebuild semantic HTML from extracted text — not a visual clone.
Security & Privacy
Encrypt, unlock, and inspect documents privately.
Why private PDF tools win for sensitive work
Cloud suites are fine for casual files. Contracts, IDs, and HR packets should never need a third-party upload just to merge or compress. StackPDF is built for that gap: full tooling, local processing, no account wall.
Private PDF guides
Long-tail how-tos for merge, compress, OCR, and encryption — without uploading sensitive files.
8 min read
PDF to Word alternative that stays private (and when it should not)
Most PDF to Word alternatives upload the file for a heavier layout engine. StackPDF rebuilds a .docx from extracted text so the document never leaves the tab.
Read guide7 min read
Best compress PDF alternative without a size cap or an upload
Cloud compressors see every page of the scan they shrink. StackPDF compresses on your device and will not hand back a larger file than you started with.
Read guideHow StackPDF stays private
Files are read into memory in your browser, processed with client libraries, and downloaded back to you. There is no upload API for your documents.
Need to compress, crop, or convert photos first? Use StackImage. stackimage.stacktools.studio