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Stirling-PDF

Edit PDFs Without Adobe Acrobat — Stirling-PDF

Want to edit, merge, split or convert PDFs without Adobe Acrobat? Stirling-PDF has 50+ PDF tools that run locally — no cloud upload, no subscription, complete privacy.

v2.10.1
May 2026
WindowsmacOSLinuxFreeOpen Source

Edit PDFs Without Adobe Acrobat — 50+ Tools, No Cloud Upload

Adobe Acrobat costs $180 a year. Smallpdf charges $18 a month and uploads your files to their servers. Stirling-PDF gives you 50+ PDF tools completely free — running locally in your browser with no file upload, no subscription, and no limit on file size or number of operations.

Need to merge several PDFs into one? Split a 200-page document into chapters? Compress a 50MB file before emailing it? Convert a scanned document to searchable text with OCR? Stirling-PDF handles all of it through a clean web interface that runs on your own machine.

Other operations include: rotate pages, extract images, add watermarks, remove watermarks, sign PDFs digitally, redact sensitive content, convert PDF to Word or PowerPoint, convert Word or images to PDF, edit metadata, reorder pages, and more.

Install via Docker (one command) or download the desktop app directly. All processing happens locally — files never leave your computer. No login required, no API key, no usage limits. Supports 40+ languages in the interface.

Ideal for anyone who occasionally needs to manipulate PDFs but can't justify Adobe Acrobat's subscription price, or who handles sensitive documents and doesn't want to upload them to external servers.

Key Features

  • 50+ PDF operations — merge, split, compress, rotate, extract, convert, OCR, and more
  • Runs locally — no cloud upload, files never leave your machine
  • Digital signatures and redaction — sign and redact sensitive content
  • Convert in both directions — PDF to Word/PPTX and Word/images to PDF
  • Batch processing — handle multiple files at once
  • Self-hosted — deploy with Docker for team or enterprise use

Who Is It For?

Anyone who needs to manipulate PDFs occasionally or regularly without paying Adobe Acrobat or uploading confidential documents to Smallpdf, iLovePDF, or similar cloud services.

Related Tools

  • NanaZip — Extract ZIP and other archives you download alongside PDFs — both run locally with no cloud dependency
  • Vert — Convert documents between formats locally when you need to go beyond PDF to DOCX, image, or other conversions

FAQ

Is Stirling-PDF free?+
Yes, Stirling-PDF is completely free and open source under the GPL-3.0 license. There are no usage limits, no subscription fees, and no feature locks.
How to edit a PDF without Adobe Acrobat for free?+
Download Stirling-PDF or run it via Docker. Open it in your browser, select your operation (merge, split, compress, OCR, etc.), upload your file, and download the result. Everything runs locally.
Best free alternative to Adobe Acrobat or Smallpdf?+
Stirling-PDF is the most complete free self-hosted alternative. Unlike Smallpdf or iLovePDF, it doesn't upload your files to external servers — all processing is local.
Stirling-PDF vs Smallpdf — which is better?+
Stirling-PDF wins on privacy (no upload), cost (free), and features (50+ tools). Smallpdf is more convenient for one-off use but charges $18/month and processes files in the cloud.