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PureKit
Zero-install · Fully offline · Privacy-first comprehensive toolkit
Converters
JSON Formatter
Format, minify, and validate JSON data
Timestamp Converter
Convert between Unix timestamps and readable dates with timezone support
Regex Tester
Real-time regex matching with capture groups and preset patterns
SQL Formatter
Format, minify, and beautify SQL queries with multiple dialect support
chmod Calculator
Visual Linux/Unix file permission calculator, convert between octal and symbolic notation
YAML Formatter
Format, minify, validate YAML, and convert between YAML and JSON
Base Converter
Convert between binary, octal, decimal, hexadecimal, and ASCII
JWT Decoder
Decode and inspect JSON Web Tokens, view Header, Payload and expiration
HTTP Status Codes
Look up HTTP status code meanings with search and category filtering
URL Parser
Parse URL components: protocol, host, path, query params, hash
Cron Parser
Parse cron expressions with human-readable descriptions and next execution times
Diff Checker
Compare two texts side by side with highlighted differences
Generators
QR Code Generator
Generate QR codes from text/URL with custom size, color, and error correction
Password Generator
Generate secure passwords with custom length, charset, and entropy display
Color Converter
Convert between HEX, RGB, HSL with color picker and contrast checker
UUID Generator
Batch generate UUID v4 with format options: uppercase, hyphens, braces
API Key Generator
Generate random API keys with custom prefix, length, and charset
Lorem Ipsum
Generate placeholder text in Chinese and English, paragraphs, sentences, or words
Encoders
Base64 Codec
Encode/decode text and files to Base64 with URL-safe mode
URL Encoder/Decoder
Encode/decode URLs, parse query params, convert Query ↔ JSON
Hash Calculator
Compute MD5/SHA-1/SHA-256/SHA-512 hashes for text and files
Documents
Markdown Editor
Live Markdown preview + PDF export with GFM support
PDF
PDF Merge
Merge multiple PDF files into one
PDF Split
Extract specific pages from a PDF
Image to PDF
Combine multiple images into a single PDF
Image
Image Converter
Convert images between PNG, JPEG and WebP with quality and size controls
SVG Optimizer
Clean and optimize SVG code by removing redundant attributes and comments
Image Compress
Compress images in the browser to reduce file size
Social Image Resize
Resize images to social media platform presets
Recommended Tools
Editor / IDE
VS Code
Open-source code editor by Microsoft
Cursor
AI-first code editor
Windsurf
AI editor by Codeium
Zed
High-performance editor built in Rust
JetBrains
Professional IDE suite
Neovim
Modern Vim-based editor
Terminal / Shell
Ghostty
Fast, GPU-accelerated open-source terminal
Warp
AI-powered modern terminal
iTerm2
Terminal replacement for macOS
Windows Terminal
Official modern terminal for Windows
AI Tools
Claude Code
AI coding assistant CLI by Anthropic
ZCode
Agentic dev environment powered by GLM
OpenCode
Open-source terminal AI coding agent
DeepSeek Harness
Open-source agent framework, everything is a plugin
pi
Minimal, extensible terminal agent harness
Hermes Agent
Self-improving AI agent framework
OpenClaw
Open-source personal AI assistant
GitHub Copilot
AI code completion
ChatGPT
Conversational AI by OpenAI
API & Debug
Bruno
Open-source local-first API client
Postman
API development and testing platform
Insomnia
Lightweight REST client
Hoppscotch
Open-source API debugging tool
Regex101
Build and debug regular expressions
Version Control
GitHub
Code hosting and collaboration
lazygit
Simple terminal UI for git commands
GitKraken
Visual Git client
Design / Screenshot
Figma
Collaborative design tool
Excalidraw
Hand-drawn style whiteboard
Carbon
Beautiful code screenshots
Docs / Reference
MDN Web Docs
Authoritative web development documentation
Can I use
Browser support tables
quicktype
Generate typed code from JSON