iTool - Your All-in-One Online Toolkit.
iTool (itool.tech) is a free browser toolkit. No download, no install. Format JSON, compare diffs, compress images, split PDFs, and more.
json-formatter
Input
Output
Spotlight / 03
Four places to start
Two playable AI tables, a personality test, and a practical library of agent skills.
A♥10♦8♠A♣Q♥
AI Game
Token Hold’em
Use AI tokens as chips and play a local browser hand against a model
Take a seat一萬九萬
定缺 · 万胡 AI Game
AI Sichuan Mahjong
Play Dingque and Bloody Battle Sichuan Mahjong against GPT-5, Claude, and DeepSeek
Start the battle 21Q · 12D
DISS Personality Index
21 scenario questions, 4 models with 12 dimensions of cross-analysis. Find out your internet alter ego.
Start Test+frontend-design01
+api-architect02
+testing-agent03
Agent Skills
Skills Hub
Browse, search, and install Agent Skills to make your AI coding assistant more powerful
View DetailsTools
Open and use. Most run locally in the browser.
Dev Tools
- JSON FormatterFormat, validate, and minify JSON with syntax highlighting and error hintsOpen
- Diff EditorCompare two pieces of text or code line-by-line, highlighting additions, deletions, and changesOpen
- URL Encoder / DecoderEncode or decode any URL or string using encodeURIComponent / decodeURIComponentOpen
- Regex TesterNEWTest regular expressions in real-time with match and replace highlightingOpen
- Timestamp ConverterNEWConvert Unix timestamps to dates and vice versa, with seconds/milliseconds and UTC/local supportOpen
- JWT DecoderNEWQuickly parse JWT Header and Payload (signature not verified)Open
- Hash GeneratorNEWGenerate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any textOpen
- Base64 CodecNEWEncode and decode text to/from Base64 format with URL-safe optionsOpen
- SQL FormatterNEWFormat and beautify SQL queries for multiple dialects (PostgreSQL, MySQL, etc.)Open
- Cron GeneratorNEWGenerate and parse cron expressions with human-readable descriptions and next execution datesOpen
- JSON to TypesNEWConvert JSON objects to TypeScript interfaces, Go structs, Rust structs, and moreOpen
- cURL to CodeNEWParse curl commands and generate type definitions for TypeScript, Go, Rust, Python, JavaOpen
Design Tools
- Image CompressorNEWBatch compress images in-browser with WebP/JPEG/PNG output, quality control, and ZIP downloadOpen
- Color ConverterNEWConvert colors between HEX, RGB, HSL, HWB, CMYK, and LCH formatsOpen
- CSS GeneratorNEWGenerate CSS for box-shadow, gradients, border-radius, and more with visual previewsOpen
- Code to ImageNEWCreate beautiful, customizable images from your source code snippetsOpen
- SVG OptimizerNEWOptimize and minify SVG files to reduce file size while maintaining qualityOpen
- Image ConverterNEWConvert images between PNG, JPEG, WebP, GIF, and AVIF formatsOpen
Productivity
Text Tools
AI Tools
- MCP DebuggerNEWConnect to a remote MCP Server and debug Tools, Resources, and PromptsOpen
- AI Regex GeneratorNEWGenerate regular expressions from natural language descriptions using AIOpen
- AI Mock APINEWProvide an interface definition and AI generates a callable mock endpoint that returns realistic, spec-compliant dataOpen
- AI Mermaid GeneratorNEWGenerate Mermaid diagrams from natural language descriptions using AIOpen
- AI Token CounterNEWEstimate token counts and reference costs for GPT, Claude, Gemini, and DeepSeekOpen
- AI Background RemoverNEWRemove image backgrounds with Doubao AI and export transparent PNGsOpen
- AI ID Photo GeneratorNEWGenerate standard ID photos with Doubao AI, including 1-inch/2-inch/passport sizes and white/blue/red backgroundsOpen
Pro
¥9.9/ mo
or ¥99 / yr
- All premium tools
- Unlimited tabs
- Priority support
- Early access to new features
- LinkShell Official Gateway access
Free ¥0 · Basic tools access / Limited tabs / Community support