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Home/Categories/Business & Productivity/Stirling PDF
icon of Stirling PDF

Stirling PDF

Open source alternative to Adobe Acrobat Pro, and

Foxit PDF Editor
Nitro PDF

A self-hosted, open-source PDF editor offering over 50 tools for secure, local PDF manipulation and automation.

78.7K starsTypeScriptMITActive this month
Visit websiteGitHub repo
image of Stirling PDF
Contents
  1. 01Who Stirling PDF is for
  2. 02The problem it solves
  3. 03How it solves it
  4. 04Strengths and trade-offs
  5. 05Stirling PDF vs alternatives
  6. 06Install and self-host
  7. 07Tech stack
  8. 08FAQ
  9. 09Similar open-source tools
TL;DR

Stirling PDF is a self-hosted PDF platform replacing Adobe Acrobat Pro for editing, signing, redaction, OCR, and conversion while keeping processing, files, and metadata under your control.MIT · TypeScript · 78.7K stars · Active this month

who it's for

Who Stirling PDF is for#

Operations teams processing contracts and approvals

Use Stirling PDF to centralize document preparation, add signatures, and apply redaction or conversion rules before records move into internal systems.

Skip if:

You need a prebuilt signature policy engine with built-in legal audit trails as a managed enterprise product and cannot run or maintain open-source infrastructure.

Product teams building document workflows

Connect Stirling PDF API calls to form pipelines and automation triggers to reduce manual document cleanup and keep conversion quality consistent across teams.

Skip if:

Your team needs deep machine learning extraction features that are only available through a specialized API-focused platform.

Developers requiring local testing for PDFs

tech stack · detected from GitHub

What it's built on#

Languages
JavaPythonRustTypeScript
Frameworks
FastAPIReact
Infrastructure
Docker
frequently asked

FAQ#

Does Stirling PDF run without a remote SaaS subscription?
Can I automate PDF tasks with APIs?
What is the canonical install command?
also worth a look

Similar open-source tools#

Okular

Okular

Multi-platform document viewer supporting PDF, EPUB, and more

1.4KC++

Repository

Stars
78.7K
Forks
6.9K
License
MIT
Latest
v2.10.1
Last commit
22 days ago
Last verified
May 13, 2026
Repo
Stirling-Tools/Stirling-PDF ↗

Additional details

Language
TypeScript
Open issues
394
Contributors
294
First release
2023

Categories

Business & ProductivityIT ManagementDeveloper Tools

Tags

Self HostedWorkflow AutomationDocumentationDeveloper ToolsDocker ManagementSecurityOpen Core

Use local instances for repeatable testing of PDF transformations and UI automation around signing, compressing, or splitting documents before publishing to production services.

Skip if:

You only need a basic viewer with no editing, signing, or workflow automation requirements.

the problem

The problem it solves#

Teams that process PDFs in growth systems often move sensitive files through external SaaS tools and lose control over retention, access, and routing. That creates risk, unpredictable pricing, and extra admin overhead when simple operations like merge, redaction, OCR, or e-signing need to run across multiple apps. Stirling PDF addresses that gap by combining editing tools, conversion features, and automation hooks in one self-hosted stack.

how Stirling PDF solves it

How it solves it#

Full PDF tool set in one interface

Stirling PDF groups edit, split, merge, rotate, convert, sign, redact, and compress workflows behind one web UI, so teams avoid juggling separate tools for core document handling tasks.

No-code automation for document pipelines

Workflows in Stirling PDF let operators build repeatable document jobs and route files through chained actions, reducing manual handoffs and enabling repeatable operations for onboarding, QA, and compliance checks.

REST APIs for system integration

A REST API layer covers the same operations as the UI, which helps teams embed PDF actions into existing services without custom screen automation.

Multi-form factor deployment

The README shows desktop, browser, and server deployment options with a private API path, useful for teams that need local workstations for some staff and centralized deployment for others.

Multi-language and enterprise controls

The platform advertises global language coverage and enterprise-grade controls including SSO and auditing, which supports distributed teams using standardized operating procedures.

strengths · trade-offs

Strengths and trade-offs#

Strengths

  • Privacy-first processing pathFiles can be processed in your private environment instead of being sent to a separate commercial PDF SaaS, which aligns with teams that need tighter privacy posture and predictable storage governance.
  • Open-core code base with MIT baseThe project is open source with a mixed license model; core areas are MIT licensed while some optional directories may carry stricter terms. This lets teams build and extend without being locked to a single binary.
  • Broad use case coverageCore PDF editing and automation features are broad enough for operations teams, legal workflows, and product teams that do both manual edits and scripted document jobs.
  • Self-hosted API pathThe private API and container-first install path simplify secure integration into internal infrastructure and reduce reliance on per-document API metering.

Trade-offs

  • -Mixed licensing surfaceThe repository marks some directories as non-MIT, so teams that depend on those optional modules should review included components and confirm license fit before shipping internal commercial offerings.
  • -OCR and heavy transformations need resourcesPDF rendering, OCR, and large conversion jobs can add CPU and memory load. Under-provisioned hosts can slow large batches, so sizing matters more than a standard office add-on tool.
  • -Community support versus paid support modelFaster issue response depends on community and maintainer activity, which may lag enterprise support contracts if your team requires strict SLA coverage for every production use.
versus alternatives

Stirling PDF vs alternatives#

Stirling PDF vs Adobe Acrobat Pro and PDF-XChange Editor

Adobe Acrobat Pro and PDF-XChange Editor are strong desktop-first PDF choices when teams want long-standing enterprise UI polish and mature support channels. Acrobat Pro has a commercial model with built-in service reliability and premium signing and review features. PDF-XChange is also polished for annotating and desktop workflows with a broad plugin history in many regulated environments.

Stirling PDF is the better fit when you need to keep PDF processing inside your own perimeter and combine document editing with self-hosted automation through a private API. If your team already routes high-volume filings through internal systems, this control model lowers recurring SaaS cost and avoids sending every file to a third-party processor.

Adobe Acrobat Pro can still win in teams that prioritize a single packaged commercial support path and feature parity across niche desktop-only edge cases. Choose PDF-XChange when your workflow depends on legacy templates and desktop ergonomics with stable IT approval patterns. For teams moving toward API-driven operations and stronger data residency controls, Stirling PDF usually gives a cleaner path.

install · self-host

Install and self-host#

bash
# Run Stirling PDF locally
docker run -p 8080:8080 docker.stirlingpdf.com/stirlingtools/stirling-pdf

You can start a local container with the published Docker image using docker run -p 8080:8080 docker.stirlingpdf.com/stirlingtools/stirling-pdf, then open http://localhost:8080.

Does Stirling PDF replace Adobe Acrobat Pro workflows?

It covers core editing, signing, redaction, OCR, and conversion workflows for many teams, especially those prioritizing self-hosting. Acrobat Pro may still fit better if you need specific legacy enterprise plugins, advanced template-heavy forms, or a long-established compliance product line.

PDF4QT

PDF4QT

Open source PDF editor and viewer for Windows and Linux

1.4KC++MIT
PDFsam Basic

PDFsam Basic

Split, merge, rotate, and extract PDF pages for free

4.4KJavaAGPL-3.0
Huginn

Huginn

Self-hosted agents that watch the web and trigger automations

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Joplin

Joplin

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54.8KTypeScript
Trilium.cc

Trilium.cc

Self-hosted hierarchical notes with backlinks and encrypted sync

36.3KTypeScriptAGPL-3.0

Yes, Stirling PDF can run as a self-hosted service in your own environment and process files through a local web UI or private API. If you need zero third-party PDF handling for regulated workflows, this deployment path is the key advantage.

Yes. Stirling PDF exposes API support for core PDF operations, which enables scripted batch jobs for merge, split, convert, and related actions. You can pair it with your own queue and monitoring stack for repeatable workflows.