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Fiverr Pro
English
$
USD
I will develop a custom chatgpt chatbot to chat with your PDF documents using langchain
Marvis
About this gig
Tired of scrolling through long PDFs to find one answer? Ill build you an AI chatbot that reads your documents and answers your questions instantly.
I build custom chat with PDF apps powered by OpenAI GPT (3.5 / 4), RAG (Retrieval-Augmented Generation) and LangChain. You upload a document, ask a question in plain language, and get a clear answer taken directly from your file.
Perfect for:
- Businesses with contracts, manuals, reports or policies
- Students and researchers working through papers and textbooks
- Support teams who need fast answers from documentation
- Startups launching their own ChatPDF-style product
What I can build:
- PDF upload and instant document Q&A
- Answers based only on your document, with source references
- Saved chat history
- Multi-language support
- User login and a database (Premium)
- A clean, responsive web interface
What you get:
- A fully working chatbot tested before delivery
- Clean, well-commented code (Standard and Premium)
- Setup instructions so you can run it yourself
- Fast replies and clear communication
Message me before ordering and tell me what kind of documents you want to chat with, and Ill recommend the best package.
Get to know Marvis
Marvis
AI Chatbot Developer and Graphic Designer
- FromUnited Kingdom
- Member sinceSep 2026
- Avg. response time1 hour
Languages
English, French, German
I help businesses save time and look professional. I build custom ChatGPT chatbots that answer questions from your own PDF documents, and I design product brochures, catalogs, flyers, logos, Canva designs, editable ebooks, and HTML email signatures. I also create and redesign clean, modern Squarespace websites for brands. You get clear communication, honest advice, regular updates, and on-time delivery, with revisions until you’re happy. Message me before ordering and we’ll make sure it’s the right fit.
My Portfolio
FAQ
Which AI model does the chatbot use?
OpenAI GPT 3.5 or GPT 4, your choice. I can discuss other models if you have a different need.
Who pays for the OpenAI API usage?
You do. You’ll provide your own OpenAI API key, so you only pay OpenAI for what the chatbot actually uses.
Will the chatbot answer only from my documents?
Yes. RAG makes it search your PDF and answer from what it finds, which keeps answers accurate and reduces made-up information
Can it handle large or multiple PDFs?
Yes. Send me the typical size and number of files before ordering so I can pick the right setup.
Do I get the source code and help deploying it?
Source code is included in Standard and Premium. Message me if you need help putting it online, and I’ll quote that as an extra.
