| What it does | Browser-based viewers and converters for documents, 3D models, images and ebooks
| Read papers. Keep what you learn.
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| Stage | Startup
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| Founded | 2024
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| Based in | Not given
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| Pricing model | Free
| Freemium
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| Pricing | No pricing plans; all tools are completely free to use.
| Free: desktop app and self-hosted server. Lite: $2/month or $20/year. Plus: $5/month or $50/year. Pro: $20/month or $200/year.
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| Key features | - PDF viewer and editor
- Merge PDF files
- Split PDF documents
- Compress PDF
- Sign PDF
- PDF to Word conversion
- PDF to Excel conversion
- 3D model viewer for STL, OBJ, GLB, GLTF and PLY
- Ebook reader for EPUB, MOBI, AZW3 and CBZ
- Image viewer and converter
| - Highlight, draw, and annotate on PDFs with every mark becoming a note
- Outliner with live Markdown and LaTeX for mathematical notation
- AI chat to ask questions about papers with cited answers
- Full-library search across notes, highlights, and all PDFs
- Shared workspaces with live cursors and comments for collaboration
- Works offline on iPad, Android, and desktop with automatic sync
- Integrations with Zotero, Obsidian, Logseq, and Notion
- Browser extension for one-click saving papers with metadata
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| What makes it different | - No installation or account registration required
- Files processed locally in browser, never uploaded to servers
- Over 1 million monthly users with 99.9% uptime
- Privacy-first approach with automatic file deletion
- Works on all devices and browsers
| - Self-hosted option with one Docker image for full control over data
- Live math support with Markdown and LaTeX directly in outliner notes
- Works on any device: Windows, macOS, Linux, iPad, Android, and browsers
- No vendor lock-in with SQLite files and export at any time
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 1 ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 22 | 9 |
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| Referring domains (Majestic) | 7 | 1 |
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PDFLE
Gamma PDF