Stirling
Stirling PDF is a PDF editor that can be run on user-provided infrastructure, according to its project description.
About Stirling
Stirling PDF is a PDF editor that can run on the user's own infrastructure. The homepage says the editor runs on the user's machine and describes it as free and private. It offers more than 60 tools for editing PDFs, including OCR for scanned pages, redaction, and compression.
The homepage also describes an API, pipelines for processing many files at once, connectors to other business tools, and an assistant that edits the open file from natural-language requests. The homepage does not state which of these are available on each plan, and it does not say how files are handled when connectors or external services are used. Pricing is described as free for individual use, but the homepage does not state terms for other use. Pricing is recorded as unknown.
Key features
- More than 60 tools for editing PDFs
- OCR for reading scanned pages
- Redaction of sensitive details in PDFs
- Compression of PDFs for archiving
- API access to PDF operations, with webhooks when processing finishes
- Assistant that makes edits in the open file from text requests
Best for: Individuals who want a free PDF editor, and teams that want to run PDF processing on their own infrastructure.
Good for
- Homepage says the editor runs on the user's machine
- Can be run on the user's own infrastructure
- Free for individual use, according to the homepage
Watch out for
- Homepage does not state pricing for uses other than individual use
- Homepage does not state which pipeline, API, or assistant features are available on each plan
Stirling at a glance
- Website
- stirling.com
- Category
- Online Tools › PDF & Document Tools
- Type
- Online tool
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for PDF & Document Tools
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Stirling FAQ
Is Stirling PDF free?
The homepage says it is free for individual use. It does not state terms for other use, and known pricing is unknown.
Can Stirling PDF run on my own servers?
The homepage says it can be run on any infrastructure. The directory description says it can be run on user-provided infrastructure.
Can it process scanned PDFs?
The homepage says it reads scanned pages and lists OCR among its tools.
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