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with a Built-in AI Brain

Edit, convert, merge, split, and chat with any PDF — all in one place. No registration. No watermark. No limits on your workflow.

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PDFKro — AI PDF RAG · Knowledge Graph

Graph built · 8 nodes

node-001

Introduction & Scope

node-002

Core Architecture

node-003

Results & Analysis

💬 What are the main conclusions?

Based on the document, the main conclusions are… the architecture achieves 94% accuracy…

node-003

Flagship AI Features

Two Powerful AI Engines.
One Platform.

PDFKro packs an AI command editor and a full vector-free RAG chatbot — built for real document workflows.

AI PDF Editor

Edit PDFs with Natural Language Commands

Describe what you want in plain English — PDFKro's AI translates your words into precise PDF operations. Rotate, watermark, compress, merge, split, annotate, add page numbers and more — no manual steps.

Rotate Watermark Merge PDFs Split Compress Annotate Page Numbers Delete Pages Remove Metadata

Type commands like "rotate all pages 90°" or "add watermark saying CONFIDENTIAL"
AI auto-detects operations from ambiguous phrasing
Process multiple PDFs simultaneously
Download edited files instantly as ZIP

Try AI PDF Editor

AI PDF Chatbot

Chat With Any PDF — Instant Answers from Your Documents

Upload any PDF and our AI builds a hierarchical knowledge graph. Then ask questions — and get precise answers grounded only in your document's content, with source citations.

Vector-free graph-tree RAG — no hallucinations from external data
Live SSE streaming — watch each node build in real time
Every answer cites the exact document section
Export graph + PDF as ZIP · Save session to browser cache
Re-upload ZIP anywhere to resume without rebuilding

Chat with Your PDF

Complete Toolkit

Every PDF Tool You'll Ever Need

From merging to converting to AI-powered editing — all 25+ tools, free, in your browser, no installation.

🤖 AI Powered

📁 Organize PDF

🔄 Convert PDF

✨ Create PDF

Simple Process

From Upload to Answer in 3 Steps

No account, no setup, no learning curve. Upload your PDF and get results in seconds.

Upload Your PDF

Drag-and-drop or click to select your PDF file. Supports any standard PDF — text, scanned (for compatible ops), multi-page, large files up to 50 MB.

Choose a Tool or Give an AI Command

Pick any tool from the dashboard, or type a natural language command for AI Edit. For the RAG chatbot, our AI builds your document's knowledge graph live.

Download or Get Your Answer

Instantly download your processed PDF, converted file, or ZIP export. For the chatbot, ask unlimited questions and get cited answers — all from your document.

Why PDFKro

Built Different. Genuinely Free.

No freemium tricks. No page limits. No watermarks on free tier. Just powerful tools that work.

Vectorless RAG — No Embedding Costs

Our PDF chatbot uses a graph-tree architecture instead of vector databases. No expensive embeddings, no API quota for storage — just AI that reads your document.

Privacy First — Files Never Stored

All PDF processing happens in-memory and is discarded after your session. Your documents are never saved to disk or shared with third parties.

Real-time Streaming with SSE

The RAG knowledge graph builds node-by-node in your browser via Server-Sent Events. Watch your document come alive as the AI processes each section.

Export & Restore Anywhere

Download your knowledge graph + original PDF as a ZIP. Upload it back anytime to instantly restore your AI session — zero rebuild time, on any device.

Source-Cited Answers Every Time

Every chatbot answer references the exact node ID and section title from your document. No black-box responses — full transparency on where each fact came from.

Natural Language PDF Commands

"Rotate all pages 90°", "add a DRAFT watermark", "merge these PDFs then split at page 5" — the AI editor understands complex, multi-step instructions in plain English.

Browser Cache — Resume Without Re-uploading

Save your RAG session to Chrome's localStorage with one click. Return later and restore the full knowledge graph instantly — no file, no rebuild needed.

Fully Responsive, No Installation

Works on desktop, tablet, and mobile. No app download, no browser plugin. Open the URL and start working — it's that simple.

The Only PDF Platform with a Built-in AI Brain

Two Powerful AI Engines.One Platform.