# AI tools for “PDF annotator” 612 matching tools; showing 24, ranked by relevance. Related categories: [ai-pdf](https://openaitools.app/category/ai-pdf.md) | # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Why it matched | Profile (Markdown) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | 1 | [UPDF AI](https://openaitools.app/tool/updf-ai) | 1,050,387 | -7.2% | Freemium, Free Trial, Paid | Cross-platform PDF editing with GPT-powered AI for reading, translating, and signing documents | category: ai-pdf; keywords 100%; semantic match | [.md](https://openaitools.app/tool/updf-ai.md) | | 2 | [LightPDF](https://openaitools.app/tool/lightpdf-com) | 1,742,568 | -15.3% | Freemium | Free AI-powered PDF editor, converter and reader for every device | category: ai-pdf; keywords 100%; semantic match | [.md](https://openaitools.app/tool/lightpdf-com.md) | | 3 | [Goodnotes](https://openaitools.app/tool/goodnotes) | 3,227,341 | +10.8% | Freemium, Free Trial | Handwritten notes, PDF markup, and AI study tools on one canvas | keywords 100%; semantic match | [.md](https://openaitools.app/tool/goodnotes.md) | | 4 | [PDNob PDF Editor](https://openaitools.app/tool/pdnob-pdf-editor) | 2,376,518 | +1.2% | Freemium, Free Trial, Paid | AI-powered PDF editor for Windows, Mac and iOS | category: ai-pdf; keywords 100%; semantic match | [.md](https://openaitools.app/tool/pdnob-pdf-editor.md) | | 5 | [PDFgear](https://openaitools.app/tool/pdfgear) | 2,845,280 | -3.4% | Free | A free, AI-powered PDF editor for every device | category: ai-pdf; semantic match | [.md](https://openaitools.app/tool/pdfgear.md) | | 6 | [pdf.net](https://openaitools.app/tool/pdf-net) | 1,257,131 | -22.3% | Freemium, Free | All-in-one online PDF editor with AI helpers for reading, summarizing, and generating documents | keywords 100%; semantic match | [.md](https://openaitools.app/tool/pdf-net.md) | | 7 | [ChatPDF](https://openaitools.app/tool/chatpdf) | 1,044,477 | -3.7% | Freemium | Chat with any PDF, video, or website and get cited answers in seconds | category: ai-pdf; semantic match | [.md](https://openaitools.app/tool/chatpdf.md) | | 8 | [Adobe Firefly](https://openaitools.app/tool/adobe) | 396,998,213 | -8.6% | Freemium | Commercially safe generative AI workspace for images, video, audio, vectors, and multi-model creative production. | category: ai-pdf | [.md](https://openaitools.app/tool/adobe.md) | | 9 | [PDF.ai](https://openaitools.app/tool/pdf-ai) | 387,819 | -5.5% | Freemium, Free Trial | Chat with any PDF and get cited answers instantly | category: ai-pdf; semantic match | [.md](https://openaitools.app/tool/pdf-ai.md) | | 10 | [SciSpace](https://openaitools.app/tool/scispace) | 4,464,111 | +8.6% | Freemium | AI research platform for reading, understanding and writing scientific papers | category: ai-pdf; semantic match | [.md](https://openaitools.app/tool/scispace.md) | | 11 | [AskYourPDF](https://openaitools.app/tool/askyourpdf) | 127,733 | +14.1% | Freemium | Chat with any PDF and add an AI chatbot trained on your own content | category: ai-pdf; semantic match | [.md](https://openaitools.app/tool/askyourpdf.md) | | 12 | [Audeus: Text to Speech Reader](https://openaitools.app/tool/audeus-text-to-speech-reader) | 32,118 | -37.8% | Freemium, Free Trial | Turn PDFs, docs and web pages into natural-sounding audio you can listen to anywhere | category: ai-pdf; keywords 100%; semantic match | [.md](https://openaitools.app/tool/audeus-text-to-speech-reader.md) | | 13 | [Heptabase](https://openaitools.app/tool/heptabase) | 179,905 | -5.8% | Free Trial, Paid | A visual knowledge base that turns scattered sources into a worldview you can build on | keywords 100%; semantic match | [.md](https://openaitools.app/tool/heptabase.md) | | 14 | [Tenorshare AI Chat PDF Tool](https://openaitools.app/tool/tenorshare-ai-chat-pdf-tool) | 90,781 | +30.4% | Freemium | Chat with PDFs, summarize documents and draft content in one AI workspace | category: ai-pdf; semantic match | [.md](https://openaitools.app/tool/tenorshare-ai-chat-pdf-tool.md) | | 15 | [ToolKK](https://openaitools.app/tool/toolkk) | 376,133 | +100.6% | Freemium | A searchable online toolbox for PDF, media, SEO, and everyday tasks | category: ai-pdf; semantic match | [.md](https://openaitools.app/tool/toolkk.md) | | 16 | [DocTranslator](https://openaitools.app/tool/doctranslator-com) | 182,003 | -9.9% | Freemium, Free Trial | Translate documents of any format while keeping the original layout | category: ai-pdf; semantic match | [.md](https://openaitools.app/tool/doctranslator-com.md) | | 17 | [SyncSketch](https://openaitools.app/tool/syncsketch) | 1,284,451 | +17.3% | Free Trial, Paid | Frame-accurate video, 3D and image review that keeps creative teams in sync from one link. | keywords 64%; semantic match | [.md](https://openaitools.app/tool/syncsketch.md) | | 18 | [GoPDF](https://openaitools.app/tool/gopdf) | 32,069 | +0.3% | Freemium | An all-in-one online PDF editor with AI chat, quizzes and invoicing | category: ai-pdf; semantic match | [.md](https://openaitools.app/tool/gopdf.md) | | 19 | [BelinDoc](https://openaitools.app/tool/belindoc) | 262,525 | -1.4% | Freemium, Contact for Pricing | Free AI document translation that keeps your original layout intact | category: ai-pdf; semantic match | [.md](https://openaitools.app/tool/belindoc.md) | | 20 | [Codia AI](https://openaitools.app/tool/codia-ai) | 398,220 | -2.8% | Freemium, Contact for Pricing | Turn flat screenshots, PDFs and slides back into editable designs and code | category: ai-pdf; semantic match | [.md](https://openaitools.app/tool/codia-ai.md) | | 21 | [O.Translator](https://openaitools.app/tool/o-translator) | 187,449 | +6.8% | Freemium | AI document translation that keeps your original layout intact | category: ai-pdf; semantic match | [.md](https://openaitools.app/tool/o-translator.md) | | 22 | [Bookmarker](https://openaitools.app/tool/bookmarker) | 4,227 | -13.7% | Paid | Local-first Mac library for links, images and PDFs, sorted by on-device AI | category: ai-pdf; keywords 100%; semantic match | [.md](https://openaitools.app/tool/bookmarker.md) | | 23 | [PDF.co](https://openaitools.app/tool/pdf-co) | 78,590 | -8.2% | Free Trial, Paid | REST API to convert, edit and extract data from PDFs | category: ai-pdf; semantic match | [.md](https://openaitools.app/tool/pdf-co.md) | | 24 | [PopAi](https://openaitools.app/tool/popai-pro) | 177,487 | -5.4% | Freemium | Turn prompts and documents into editable presentations with AI | category: ai-pdf; semantic match | [.md](https://openaitools.app/tool/popai-pro.md) | Page 1 of 26 · [Next page →](https://openaitools.app/index.md?q=PDF+annotator&page=2) For programmatic access use `https://openaitools.app/api/tools?q=…` or MCP `https://openaitools.app/api/mcp`. --- Source: https://openaitools.app/?q=PDF%20annotator More Markdown: [Categories](https://openaitools.app/categories.md) · [Traffic rankings](https://openaitools.app/rankings.md) · [llms.txt](https://openaitools.app/llms.txt)