ToolHero
Fast & Minimal
Lightweight tools, instant results, zero fluff.
Privacy-first
No tracking. Local-first when possible.
AI-powered
LLM utilities and knowledge to accelerate work.
Multilingual
English and Chinese content available.
Many Utilities
Images, code, math, PDF, markdown, and more.
Playful
Mini-games and interactive demos to learn by doing.
Tools Gallery
Popular online tools and demos. Click a card to start.
Image Converter
Convert, resize, compress images.
Remove Image BG
Remove background with AI.
Code to Image
Pretty code snapshots.
Image Generator
Generate images from prompts.
Photo Gallery
Masonry gallery & viewer.
Markdown to PDF
Export MD to styled PDF.
PDF to Markdown
Extract PDF to MD.
Link Preview
Generate social link cards.
Byte Translator
Binary/hex/base enc/dec.
IP Geolocation
Find IP location info.
Translator
Translate between languages.
AI Math
Solve math with steps.
Web Sketch
Draw and annotate online.
Snake
Classic snake game.
Gobang
Five in a row.
Maze
Generate and play mazes.
Latest Knowledge Docs
Curated from R&D Skills and Code Sharing
Design Patterns
Common patterns with practical tips.
Data Structures Guide
Core DS with intuition and use cases.
Golang Interview 50 Q&A
Handpicked interview questions with answers.
Build RPC Server
From scratch to working RPC in Go.
Golang HTTP Guide
HTTP client/server essentials in Go.
Golang Channel
Patterns and pitfalls.
Golang IO
IO basics and practical recipes.
LeetCode Patterns
Solve problems by pattern.
Backend Roadmap
From fundamentals to production.
Ollama Guide
Local LLMs with Ollama.
Agent Workflow
Designing LLM agent pipelines.
Agno Agents
Composable agents for tasks.
Doc/x to Markdown
Convert office docs into Markdown.
Build faster with smart tools
Free, privacy-friendly utilities for devs, creators, and learners.