One processor.
Every PDF.
From individual editing to org-wide processing, Stirling unifies all of your PDF work.
Used by 75% of the Fortune 500
Bring your whole team. Everything you need to scale from editing one PDF to processing millions.
PDF Editor
60+ tools for lightning-fast reading, editing and signing.
PDF Processor
Classify, standardize and route thousands at once. Fully automated.
PDF Server
Stirling Cloud, your own servers, or air-gapped. Files never leave.
PDF Editor
Private, open-source, and audit-ready.
Protect your sensitive files from landing in websites you can't trust. Stirling's editor runs on your machine, and the source is public so you can verify that instead of trusting it.
PDF Processor
Work on thousands of PDFs at a time.
Set up a pipeline once and it runs on every PDF that arrives. Stirling makes recommendations based on your unique PDF workflows and industry standards.
Reads scans, not just digital files
Rule changes need approval
Every action logged
Scale with Stirling
Call it from your own code, connect the tools your team already uses, or just ask.
Redact all of the account numbers.
Done. I made 14 redactions across 9 pages. Please review them in the canvas.
Assistant
For the file you have open, just ask. The assistant makes the edit in place - redact, translate, summarize, convert - while you watch.
stirling-api
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POST /api/v1/pipelines/intake
Process contracts-0729.zip · 412 PDFs
APIs & MCP
Every PDF operation, callable from your own systems. One request in, processed files out, webhooks when it's done.
Pipelines
Chain operations into one run. Process file batches programmatically.
Policies
Your rules, applied the moment a file arrives.
Connectors
Integrate with the tools your team already uses every day.
PDF Servers
Run Stirling on any infrastructure
Validated by security experts worldwide
“Stirling PDF is the ultimate tool for manipulating your PDFs. For those worried about their privacy, don't panic. Your files stay safe and sound on your machine."
Manuel Dorne
Cybersecurity Expert, Korben
“Stirling PDF has become an essential part of my document processing pipeline....It creates a powerful automated workflow that handles my documents securely and efficiently”
Akash Rajpurohit
Sr Software Engineer, Levels.fyi
"The best part is Stirling's features can be used either from the platform or via API, ideal if you are working on a project requiring document processing or PDF generation."
Wassim Samad
Developer, 3D AI Studio
"This is the one PDF Editor to rule them all! My quest for the perfect PDF editor finally paid off. Meet Stirling PDF, the only PDF editor you will ever need."
Vikash Jhagroe
Sr Technical Adoption Mgr, VMware
"Stirling PDF is the ultimate PDF editor. DO NOT use Adobe Acrobat Pro. Use Stirling PDF."
Carlos Melantuche
Sr Infrastructure Engineer, Aramark
“Stirling is the best open-source PDF manipulation tool. The interface is designed to be clear and simple, making it easy for anyone to use.”
Senthilkumar Palani
Editor, OSTechNix
“For those who don’t want to pony up for Adobe’s software or upload their files to sketchy-looking file conversion websites, Stirling PDF is the Swiss Army knife for PDF documents."
Zack Whittaker
Security Editor, TechCrunch
“Every feature in Stirling is designed to maximize your productivity while remaining intuitive to use."
Clement Mondary
Agency Director, Groupe Luminess
“Stirling PDF has its rightful place in business environments. It meets many user needs and costs nothing to start.”
Florian Burnel
System Engineer, IT-Connect