Stirling PDF is unclaimed —

Stirling PDF

Your PDFs. Your control.·stirlingpdf.com

Stirling PDF is an open-source, locally hosted web application with native desktop apps (Windows, macOS, Linux) offering 60+ PDF tools for editing, converting, merging, signing, and processing documents. It supports self-hosted deployment for individuals and teams, plus pay-as-you-go and enterprise-scale automated PDF pipelines for larger organizations. Files are processed locally with automatic deletion after each task, and it includes enterprise features such as SSO, user management, and API integration.

What it's for

Editing and converting PDFsMerging PDF filesSigning PDFsBatch processing thousands of documents through PDF pipelinesAutomating PDF security and compliance without opening filesClassifying, protecting, and routing PDFs automaticallyProcessing classified intelligence in air-gapped environmentsSecuring citizen data for public recordsHIPAA-compliant PDF processing for health systemsProtecting intellectual property, schematics, and blueprintsAutomating loan processing and KYCAccelerating e-discovery and contract reviewSpeeding up claims adjudication with automated data extractionManaging critical infrastructure documents in remote, offline environments

Features 15

60+ PDF tools (signing, converting, merging, etc.)
Advanced customization with themes and environment variables
API integration for automation and external workflows
Batch processing with Docker and Kubernetes support
Enterprise features: SSO, user management, permission controls
In-app settings configuration via UI
Local file processing with automatic deletion post-task
Multi-language support (40+ languages)
Native desktop apps with fast startup and 'Open with' integration, offline capable
Open-source, community-driven development
PDF pipelines for automated classification, protection, and routing
Spend limits / monthly budget caps
Stateful processing: upload once, use across multiple tools
Undo & redo with full version history for page editing
Volume discounts for high-usage customers

At a glance

free tieropen sourceself-hostableAPI

TypeWeb app

DeploymentHybrid

PlatformsWeb, Windows, macOS, Linux

Forindividuals, organizations, teams of all sizes, developers, IT teams, enterprises

CompanyStirling PDF Inc.

Integrations

Google DriveDockerKubernetes

Complianceself-reported

HIPAA

Resources

Pricing

Pay As You Go pricing starts at $0.01 per document processed with 500 free documents at sign-up (no credit card required). Higher-volume tiers (10,000-1,000,000 PDFs and over 1,000,000 PDFs) require contacting sales; no explicit price given.

FreeFree

Self-hosted, open-source version for teams processing under 10,000 PDFs.

Under 10,000 PDFs

Pay As You GoQuote

Spend limits can be set to cap monthly costs.

500 free documents at sign up, no credit card required

10,000-1,000,000 PDFsQuote

No price stated; contact via 'Get started'.

For organizations processing 10,000 to 1,000,000 PDFs

Over 1,000,000 PDFsQuote

No price stated; contact via 'Get started'.

For organizations processing over 1,000,000 PDFs

Commit to annual volume and save up to 25%; rates scale down as usage scales up.