Comparison

Nitro Pro vs pdf-lib

No clear leader: Nitro Pro (63.3) and pdf-lib (59.4) are within the 5-point margin; treat as a tie. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.

Nitro Pro full profile →pdf-lib full profile →

Machine formatsJSON Markdown GraphQLor send Accept: application/json

Nitro Pro63

pdf-lib59

Attribute comparison across 2 tools
Attribute	Nitro Pro	pdf-lib
Vioscale score	63 / 100medium · 55%	59 / 100low · 20%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	freemium	commercial
Price levelpricing.price_level	low	free
Transparentpricing.transparent	✗	✓
Integrations
Countintegrations.count	20	-
Security
Disclosure policysecurity.disclosure_policy	✓	-
Gdprsecurity.gdpr	✓	-
Hipaasecurity.hipaa	✓	-
Iso27001security.iso27001	✓	-
Soc2security.soc2	✓	-
Vulnerabilitiessecurity.vulnerabilities	-	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=pdf-lib&per_page=100 · Last 12m: 0
Adoption
Dependent reposadoption.dependent_repos	-	2,364
Github starsadoption.github_stars	-	8,605
Activity
Commits last 30dactivity.commits_last_30d	-	0
Release
Cadence daysrelease.cadence_days	-	19
Historyrelease.history	-	20 items
License
Spdxlicense.spdx	-	MIT
Language
Primarylanguage.primary	-	TypeScript
Market
Availabilitymarket.availability	Available worldwide · Popular in US, GB, CA, AU · HQ IE	-

Score

Vioscale score

Nitro Pro63 / 100medium · 55%

pdf-lib59 / 100low · 20%

Pricing

Free tier

Nitro Pro✓

pdf-lib✓

Model

Nitro Profreemium

pdf-libcommercial

Price level

Nitro Prolow

pdf-libfree

Transparent

Nitro Pro✗

pdf-lib✓

Integrations

Count

Nitro Pro20

pdf-lib–

Security

Disclosure policy

Nitro Pro✓

pdf-lib–

Gdpr

Nitro Pro✓

pdf-lib–

Hipaa

Nitro Pro✓

pdf-lib–

Iso27001

Nitro Pro✓

pdf-lib–

Soc2

Nitro Pro✓

pdf-lib–

Vulnerabilities

Nitro Pro–

pdf-libCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=pdf-lib&per_page=100 · Last 12m: 0

Adoption

Dependent repos

Nitro Pro–

pdf-lib2,364

Github stars

Nitro Pro–

pdf-lib8,605

Activity

Commits last 30d

Nitro Pro–

pdf-lib0

Release

Cadence days

Nitro Pro–

pdf-lib19

History

Nitro Pro–

pdf-lib20 items

License

Spdx

Nitro Pro–

pdf-libMIT

Language

Primary

Nitro Pro–

pdf-libTypeScript

Market

Availability

Nitro ProAvailable worldwide · Popular in US, GB, CA, AU · HQ IE

pdf-lib–

Capabilities

Feature-by-feature on the axes that matter for pdf editors. “-” means undocumented, not absent.

Capability comparison for PDF Editors
Capability	Nitro Pro	pdf-lib
Capabilities
Deployment model	Cloud saas	-
Base text and image editing within PDF	✓	-
Page merging extraction and splitting	✓	-
OCR optical character recognition scanning	✓	-
Permanent blackout redaction engine	✓	-
Password protection and encryption	✓	-
Interactive form field creation	✓	-
Digital signature certification enforcement	✓	-
Microsoft office docx xlsx conversion	✓	-
File size compression engine	✓	-
SOC2 type ii	✓	-
ISO 27001	✓	-
Pricing model	Flat subscription	-

Capabilities

Deployment model

Nitro ProCloud saas

pdf-lib-

Base text and image editing within PDF

Nitro Pro✓

pdf-lib-

Page merging extraction and splitting

Nitro Pro✓

pdf-lib-

OCR optical character recognition scanning

Nitro Pro✓

pdf-lib-

Permanent blackout redaction engine

Nitro Pro✓

pdf-lib-

Password protection and encryption

Nitro Pro✓

pdf-lib-

Interactive form field creation

Nitro Pro✓

pdf-lib-

Digital signature certification enforcement

Nitro Pro✓

pdf-lib-

Microsoft office docx xlsx conversion

Nitro Pro✓

pdf-lib-

File size compression engine

Nitro Pro✓

pdf-lib-

SOC2 type ii

Nitro Pro✓

pdf-lib-

ISO 27001

Nitro Pro✓

pdf-lib-

Pricing model

Nitro ProFlat subscription

pdf-lib-

What each one is

The product in its own terms, so the numbers below have context.

Nitro Pro

Comprehensive software for creating, editing, and securing PDFs with integrated digital signature capabilities and intelligent document automation. Available across Windows, Mac, iOS, and web with enterprise-grade security and productivity features.

Independently observed

pdf-lib

A pure JavaScript PDF manipulation toolkit that runs across any JavaScript environment including web browsers, Node.js, Deno, and React Native. It enables creating new PDFs, editing existing documents, filling forms with various field types, embedding fonts, and merging or splitting pages.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Nitro Pro

SubscriptionFree tier14-day trial

Subscription-based with tiered plans; enterprise pricing by quote

Individual/Teams-
- Edit text and images
- OCR
- Digital signatures
- Form creation
- File compression
- +1 more
Plus-
- All standard features
- Nitro Analytics dashboard
- ROI tracking
- Sustainability metrics
EnterpriseContact sales
- API access
- SSO
- Azure Information Protection
- Domain control
- QTSP qualified electronic signatures
- +1 more

as of 2026-08-25verify ↗

pdf-lib

FreeFree tier

Free

as of 2026-08-19verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	Nitro Pro	pdf-lib
WebPlatforms	✓	✓
iOSPlatforms	✓	✗
macOSPlatforms	✓	✗
WindowsPlatforms	✓	✗
Cloud / SaaSDeployment	✓	-

Platforms

Web

Nitro Pro✓

pdf-lib✓

iOS

Nitro Pro✓

pdf-lib✗

macOS

Nitro Pro✓

pdf-lib✗

Windows

Nitro Pro✓

pdf-lib✗

Deployment

Cloud / SaaS

Nitro Pro✓

pdf-lib–

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Nitro Pro

20 total

Salesforce
Microsoft 365
Word
Excel
PowerPoint
SharePoint
OneDrive
Teams
Slack
Google Workspace
Zapier
iManage
M-Files
PDF Butler
Alfresco
TalentSoft
Aareon
Silverfin
AdminPulse
Sofico

Independently observed

pdf-lib

Not documented yet.

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.