What is 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.
pdf-lib pricing
We don't have pdf-lib's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
Platform & deployment
Independently observed- Web
Security & compliance
Known vulnerabilities: 0 (0 in the last 12 months) sourcea count reflects scale & disclosure, not quality
pdf-lib alternatives
Other pdf editors we track, ranked by the same independent score.
- Foxit PDF EditorDesktop and cloud-based PDF editor with AI-powered document analysis and enterprise-grade compliancemedium · 55%
- Nitro ProA unified platform that combines PDF editing, digital signatures, and document automation to streamline document workflowsmedium · 55%
- iLovePDFOnline tools for editing, converting, and managing PDF documents through a browser interfacemedium · 62%
- Stirling-PDFlow · 16%
- PyMuPDFlow · 24%
- SmallpdfComprehensive suite of PDF tools for converting, editing, compressing, and managing documents online and offline.medium · 55%
Compare pdf-lib
Side by side against other pdf editors, attribute by attribute, with a source on every value.
The Vioscale score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for pdf-lib, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Pricing transparency | 80 | 0.08 | 6.7 | ✓ |
| Price level | 100 | 0.05 | 5.2 | ✓ |
| Release cadence | 89 | 0.05 | 4.7 | ✓ |
| Dependent projects | 56 | 0.06 | 3.5 | ✓ |
| Stars | 74 | 0.03 | 1.9 | ✓ |
| Reliability | 0 | 0.07 | 0.0 | - |
| Capabilities | 0 | 0.08 | 0.0 | - |
| Integrations | 0 | 0.09 | 0.0 | - |
| Development activity | 0 | 0.09 | 0.0 | ✓ |
| Security posture | 0 | 0.07 | 0.0 | - |
| Package downloads | 0 | 0.14 | 0.0 | - |
| Security score | 0 | 0.04 | 0.0 | - |
| Developer Q&A activity | 0 | 0.06 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 0 | mediumsource · 2026-08-26 · 65% |
Adoption
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | TypeScript | highsource · 2026-08-26 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | MIT | highsource · 2026-08-26 · 95% |
Pricing
Release
Security
| Attribute | Value | Evidence |
|---|---|---|
| Vulnerabilities | Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=pdf-lib&per_page=100 · Last 12m: 0 | highsource · 2026-08-26 · 90% |