# pdf-lib vs Sejda

| Attribute | pdf-lib | Sejda |
|---|---|---|
| **vioscaleAI score** | 47.6 (44% (low)) | 47.6 (53% (medium)) |
| activity.commits_last_30d | 0 | - |
| adoption.dependent_repos | 2,364 | - |
| adoption.github_stars | 8,660 | - |
| content.faq | `[{"answer":"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. It is indexed under PDF Editors.","source":"https://pdf-lib.js.org/","question":"What is pdf-lib?","confidence":0.6},{"answer":"pdf-lib offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://pdf-lib.js.org/","question":"Is pdf-lib free?","confidence":0.6},{"answer":"We have confirmed browser-based access to pdf-lib. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://pdf-lib.js.org/","question":"What platforms does pdf-lib support?","confidence":0.6},{"answer":"Yes. pdf-lib is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/hopding/pdf-lib","question":"Is pdf-lib open source?","confidence":0.95}]` | `[{"answer":"An online and desktop PDF editor that allows users to edit text and images, combine and split PDFs, fill forms, add signatures, convert file formats, and apply security protections to PDF files. It is indexed under PDF Editors.","source":"https://www.sejda.com/","question":"What is Sejda?","confidence":0.6},{"answer":"Sejda offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://www.sejda.com/","question":"Is Sejda free?","confidence":0.6},{"answer":"Sejda supports the web, Windows, macOS and Linux. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://www.sejda.com/","question":"What platforms does Sejda support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Sejda, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://www.sejda.com/","question":"Can Sejda be self-hosted?","confidence":0.6}]` |
| deployment.options | - | `{"cloud":true}` |
| description.long | A programming library that enables developers to create, edit, and manipulate PDF files with support for embedded fonts, form field creation, page embedding, and text drawing. | Sejda is a cloud-based and desktop PDF editing platform that supports text and image editing, form creation and filling, signature addition, page arrangement, optical character recognition on scanned documents, password protection, and conversion to and from various file formats. |
| features.capabilities | `{"interactive_form_field_creation":true,"page_merging_extraction_and_splitting":true,"base_text_and_image_editing_within_pdf":true,"ocr_optical_character_recognition_scanning":false}` | `{"pricing_model":"freemium","deployment_model":"cloud_saas","file_size_compression_engine":true,"interactive_form_field_creation":true,"password_protection_and_encryption":true,"permanent_blackout_redaction_engine":true,"microsoft_office_docx_xlsx_conversion":true,"page_merging_extraction_and_splitting":true,"base_text_and_image_editing_within_pdf":true,"ocr_optical_character_recognition_scanning":true,"digital_signature_certification_enforcement":true}` |
| 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":"freemium","summary":"Free tier available with paid plans option","freeTier":true,"sourceUrl":"https://www.sejda.com/","retrievedAt":"2026-10-02T10:54:08.210Z"}` |
| 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 | - | 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 | - | Freemium |

*Source: vioscaleAI. Generated 2026-10-16T20:38:39.890Z. "-" = undocumented, not absent.*