Khanh Duy

Bui Trong Khanh Duy / Full-stack developer / Vietnam

Software engineer simplifying ideas with technology.

I'm Khanh Duy, a full-stack developer in Ho Chi Minh City. For 5+ years, I've shipped web and mobile products that turn complex ideas into fast, simple, reliable experiences with JavaScript, React, TypeScript, and Next.js.

Experience

5+ years

Stack

JS / TS / React

Free tools

20 tools

AI agents

8 agents

Khanh Duy

Currently

Vietnam / GMT+7

Building useful AI systems that people can actually operate.

Products

Two serious products, one compact story.

AI research platform2,000+ researchers
ChatAcademia
A research workspace for searching papers, talking with frontier models, finding gaps, and moving from idea to citation-backed draft.
ChatAcademia product preview
Next.jsAI agentsAcademic searchSubscriptions
Document intelligence APIstructured extraction
PDF Vector
A scalable PDF processing API for extracting structured data from complex documents and powering document automation systems.
PDF Vector product preview
API designPDF parsingRAG pipelinesSchema extraction
Workflow bankn8n live / Make and Zapier mapped

Open source automation library

Ready-to-import document workflows for real operations.

A public bank of PDF Vector powered automations for teams that need documents to become structured actions: invoices, contracts, statements, resumes, medical records, and more.

Open repository
workflow files

76

format

JSON imports

coverage

PDF automation

Recipes inside

Invoice, receipt, PO, bank statement, and AP approval automation
Healthcare, insurance, KYC, compliance, lease, and shipping document flows
Research, resume, transcript, grant, and knowledge-work extraction recipes

Free AI agents

Use small agents for real work.

Show all
Email Digest Agent
Turn long email threads into decisions, blockers, and replies.
Run
AutoHybrid

Input

email, text

Workflows

Support triage, Executive digest, Reply draft

File to Data Agent
Upload text, CSV, JSON, or logs and get structured data back.
Run
HF modelLocal first

Input

file, text

Workflows

Extract rows, Data dictionary, Import package

Private Summarizer
Summarize pasted content locally before anything touches a server.
Run
Chrome AILocal first

Input

text

Workflows

Meeting recap, Research brief, Decision log

Day Planner Agent
Turn a messy life-admin brain dump into a realistic day plan.
Run
AutoLocal first

Input

text

Workflows

Daily reset, Life admin sprint, Busy week triage

Data Cleaner Agent
Normalize messy lists, copied tables, and exported CSV content.
Run
HF modelLocal first

Input

file, text

Workflows

Clean contacts, Spreadsheet prep, QA report

Subscription Audit Agent
Find recurring charges, renewal risks, and realistic cancellation targets.
Run
AutoLocal first

Input

text, file

Workflows

Subscription cleanup, Monthly bill map, Renewal watchlist

Free tools

The useful links, without the maze.

Show all
Palette From Image
Extract a usable color palette from a product or brand image.
Open tool
Image Compressor
Shrink large screenshots and product images before uploading.
Open tool
Images to PDF
Combine receipts, screenshots, and scans into a single PDF file.
Open tool
JSON Formatter
Format, validate, and inspect JSON payloads without uploading data.
Open tool
QR Code Generator
Create QR codes for URLs, Wi-Fi credentials, contacts, and short text.
Open tool
Timestamp Converter
Convert Unix timestamps into readable local and UTC dates.
Open tool

Showing 1-6 of 20 free tools