# pdf-lib vs Sejda

| Attribute | pdf-lib | Sejda |
|---|---|---|
| **Vioscale score** | 59.4 (20% (low)) | 37.4 (26% (low)) |
| activity.commits_last_30d | 0 | - |
| adoption.dependent_repos | 2,364 | - |
| adoption.github_stars | 8,605 | - |
| deployment.options | - | `{"cloud":true,"hybrid":true}` |
| description.long | 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. | A PDF editor available as both web-based and desktop applications, offering document editing, form creation, and file conversion tools with offline and cloud options. |
| integrations.count | - | 1 |
| integrations.list | - | `[{"name":"Google Drive"}]` |
| language.primary | TypeScript | - |
| license.spdx | MIT | - |
| platform.support | `{"web":true}` | `{"mac":true,"web":true,"linux":true,"windows":true}` |
| pricing | `{"type":"free","summary":"Free","freeTier":true,"sourceUrl":"https://pdf-lib.js.org/","retrievedAt":"2026-08-19T16:04:48.894Z"}` | `{"type":"hybrid","summary":"Free tier available; paid plans available but specific pricing not disclosed","freeTier":true,"sourceUrl":"https://www.sejda.com/","retrievedAt":"2026-08-20T12:46:26.308Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | freemium |
| pricing.price_level | free | low |
| pricing.transparent | yes | no |
| release.cadence_days | 19 | - |
| release.history | `[{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.17.1","date":"2021-11-06T22:31:59Z","type":"stable","version":"v1.17.1"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.17.0","date":"2021-10-16T21:23:39Z","type":"stable","version":"v1.17.0"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.16.0","date":"2021-01-27T01:11:42Z","type":"stable","version":"v1.16.0"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.15.0","date":"2021-01-09T23:04:56Z","type":"stable","version":"v1.15.0"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.14.1","date":"2020-12-30T00:07:00Z","type":"stable","version":"v1.14.1"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.14.0","date":"2020-12-21T17:46:03Z","type":"stable","version":"v1.14.0"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.13.0","date":"2020-12-06T20:09:41Z","type":"stable","version":"v1.13.0"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.12.0","date":"2020-11-15T15:49:05Z","type":"stable","version":"v1.12.0"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.11.2","date":"2020-10-09T22:10:18Z","type":"stable","version":"v1.11.2"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.11.1","date":"2020-09-15T23:54:00Z","type":"stable","version":"v1.11.1"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.11.0","date":"2020-09-13T20:29:46Z","type":"stable","version":"v1.11.0"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.10.0","date":"2020-08-08T16:26:20Z","type":"stable","version":"v1.10.0"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.9.0","date":"2020-06-26T23:26:28Z","type":"stable","version":"v1.9.0"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.8.0","date":"2020-06-20T18:26:25Z","type":"stable","version":"v1.8.0"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.7.0","date":"2020-05-30T16:20:25Z","type":"stable","version":"v1.7.0"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.6.1","date":"2020-05-25T15:57:14Z","type":"stable","version":"v1.6.1"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.6.0","date":"2020-05-16T15:55:44Z","type":"stable","version":"v1.6.0"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.5.0","date":"2020-04-26T20:26:56Z","type":"stable","version":"v1.5.0"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.4.1","date":"2020-03-07T16:59:52Z","type":"stable","version":"v1.4.1"},{"url":"https://github.com/Hopding/pdf-lib/releases/tag/v1.4.0","date":"2020-02-29T16:39:41Z","type":"stable","version":"v1.4.0"}]` | - |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=pdf-lib&per_page=100","last_12m":0,"max_severity":null}` | - |

## Capabilities (PDF Editors)

| Capability | pdf-lib | Sejda |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Deployment model | - | - |
| 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 | - | - |

*Source: Vioscale. Generated 2026-09-01T17:05:45.211Z. "-" = undocumented, not absent.*