Developer Micro-Tools Collection
A suite of essential tools for developers, Fast, reliable, and easy to use.
Popular Tools
JSON Editor
View, edit, format, and validate JSON data.
Format Converter
Convert between JSON, YAML, TOML, and XML formats.
Regex Tester
Test regular expressions with flags and see matches and groups.
JWT Decode
解码JWT头与负载，查看标准声明与时间。
API Debugger
Test and debug HTTP requests with ease. Support for GET, POST, PUT, DELETE.
Cron & Quartz
编写/校验 Cron 与 Quartz，预览下次运行与配置。
Date & Time Tools
时间戳转换、格式化、区间差值、相对时间。
QR Code Generator
Generate QR codes for URLs, text, and more. Customizable size and color.
Password Generator
Generate strong passwords with customizable character sets and length.
Base64 编解码
UTF-8 安全的 Base64 编码与解码，支持标准与 URL-safe 变体。
URL 编码
URL 组件编码与完整 URL 编码互转，支持解码与错误提示。
UUID 生成器
生成 RFC 4122 v4 UUID，支持批量、大写、去除连字符。
SQL 格式化
格式化、压缩 SQL，支持多方言（MySQL/PG/Hive/Spark/SQLite）。
Token 计数器
使用 js-tiktoken 估算文本 token 数，支持多种编码。
Prompt 构建器
模板化组装 Prompt，支持保存草稿到本地。
Margin Calculator
Calculate profit margin and markup from cost and selling price instantly.
Discount Calculator
Calculate discounted prices and savings instantly. Works both ways: percent off or final price.
Tip Calculator
Calculate tip amount and split bills between multiple people. Works for restaurants, deliveries, and services.
Size Converter
Convert shoe and clothing sizes between US, EU, UK and Asian sizing systems instantly.
Seller Profit Calculator
Calculate net profit from selling online including all platform fees, shipping and ad costs.
VAT Calculator
Calculate VAT/PPN/GST for any country. Add or remove VAT from prices instantly.
Currency Calculator
Convert between USD, EUR, GBP, IDR, VND, PHP, SAR, AED, BRL and more currencies.
AI Customer Reply
AI-powered customer service reply generator in 9 languages with tone control.
AI Product Description
AI generates ecommerce product titles, descriptions and SEO tags. Multi-language.
Recently Added
Base64 编解码
UTF-8 安全的 Base64 编码与解码，支持标准与 URL-safe 变体。
URL 编码
URL 组件编码与完整 URL 编码互转，支持解码与错误提示。
UUID 生成器
生成 RFC 4122 v4 UUID，支持批量、大写、去除连字符。
SQL 格式化
格式化、压缩 SQL，支持多方言（MySQL/PG/Hive/Spark/SQLite）。
SQL 表提取
从 SQL 中提取涉及的表名，按类型（查询/写入/结构）分类。
SQL 列提取
从 SQL SELECT 语句提取列名，支持表前缀与别名。
SQL → Mermaid
解析 CREATE TABLE DDL 生成 Mermaid ER 图代码。
SQL Review
规则式 SQL 静态检查，发现潜在性能与安全问题。
JSON Schema 生成器
从 JSON 样本推断 JSON Schema (draft-07)。
Data Faker
批量生成测试假数据，支持 JSON/CSV/SQL 格式。
Docker Run 构建器
表单生成 docker run 命令，支持端口/卷/环境变量/网络。
Docker Compose 生成器
表单生成 docker-compose.yml，支持多服务与环境变量。
K8s YAML 生成器
表单生成 Kubernetes Deployment / Service YAML。
K8s 资源计算器
估算 Pod 资源需求与集群容量，判断是否超量。
Systemd 生成器
表单生成 systemd .service unit 文件。
Token 计数器
使用 js-tiktoken 估算文本 token 数，支持多种编码。
Prompt 构建器
模板化组装 Prompt，支持保存草稿到本地。
Prompt 对比
两版 Prompt 差异高亮，直观对比变化。
RAG 分块计算器
估算 chunk 数量与 token 分布。
AI 成本计算器
主流模型价格 × token 数 → 成本估算。
LLM 请求构建器
表单生成 OpenAI 兼容请求 JSON / curl 命令。
钱包地址解析
验证以太坊地址格式，解析 EIP-55 checksum 状态。
ENS 查询
正向/反向解析 ENS 域名与以太坊地址。
Gas Tracker
查询当前以太坊 Gas 价格（低/中/高建议）。
哈希识别
识别哈希类型（ETH/BTC TXID、ENS Namehash、IPFS CID、UUID）。
Token 授权查询
查询地址的 Token 授权额度，识别无限授权。
Token 风险扫描
分析 ERC-20 合约风险：Mint 函数、Owner 权限、交易税等指标。
交易解码器
输入交易哈希，解码交易详情：from/to/value/input data/logs。
代币持有者分析
分析 ERC-20 代币 Top 持有者分布，基于转账记录估算。
钱包资产查询
查询以太坊钱包的 ETH 余额和 ERC-20 代币持有情况。
巨鲸追踪
追踪链上大额 ERC-20 转账，发现巨鲸动向。
Developer19
JSON Editor
View, edit, format, and validate JSON data.
JSON Diff
Compare two JSON objects structurally and pretty print changes.
Format Converter
Convert between JSON, YAML, TOML, and XML formats.
Code Formatter
Format your code to standard styles. Supports JS, TS, HTML, CSS, JSON, etc.
Regex Tester
Test regular expressions with flags and see matches and groups.
Markdown ↔ HTML
Convert Markdown to HTML and HTML back to Markdown.
Markdown → Email
Render Markdown into email-safe HTML (Gmail, Outlook, Apple Mail).
JWT Decode
解码JWT头与负载，查看标准声明与时间。
HTML to Text
Extract text content from HTML, removing tags and scripts.
API Debugger
Test and debug HTTP requests with ease. Support for GET, POST, PUT, DELETE.
Text Diff
Compare two texts using characters, words, or lines diff.
Base Converter
进制转换：二/八/十/十六，支持 2-36 进制。
Programmer Naming
根据关键词生成变量/函数/类/文件/包命名建议。
Commit Message
Generate conventional git commit messages.
.gitignore Generator
Generate .gitignore files for your stack.
Mermaid Renderer
Render Mermaid diagrams as beautiful SVGs or ASCII art.
Drawing Board
Infinite-canvas whiteboard with pen, shapes, arrows, images.
Base64 编解码
UTF-8 安全的 Base64 编码与解码，支持标准与 URL-safe 变体。
URL 编码
URL 组件编码与完整 URL 编码互转，支持解码与错误提示。
Data9
Mr. Data Converter
Convert CSV/Excel to JSON, XML, MySQL, PHP, Python, Ruby, and more.
CSV ↔ JSON
解析CSV为JSON数组，支持分隔符/引号、数字识别。
SQL 格式化
格式化、压缩 SQL，支持多方言（MySQL/PG/Hive/Spark/SQLite）。
SQL 表提取
从 SQL 中提取涉及的表名，按类型（查询/写入/结构）分类。
SQL 列提取
从 SQL SELECT 语句提取列名，支持表前缀与别名。
SQL → Mermaid
解析 CREATE TABLE DDL 生成 Mermaid ER 图代码。
SQL Review
规则式 SQL 静态检查，发现潜在性能与安全问题。
JSON Schema 生成器
从 JSON 样本推断 JSON Schema (draft-07)。
Data Faker
批量生成测试假数据，支持 JSON/CSV/SQL 格式。
Linux5
DevOps8
Nginx Config Generator
Generate Nginx configuration files online with HTTPS, proxy, Gzip support.
Apache Config Generator
Generate Apache VirtualHost configuration files online with HTTPS, redirects, logs.
HAProxy Config Generator
Generate HAProxy load balancer configuration files with algorithms, health checks.
Docker Run 构建器
表单生成 docker run 命令，支持端口/卷/环境变量/网络。
Docker Compose 生成器
表单生成 docker-compose.yml，支持多服务与环境变量。
K8s YAML 生成器
表单生成 Kubernetes Deployment / Service YAML。
K8s 资源计算器
估算 Pod 资源需求与集群容量，判断是否超量。
Systemd 生成器
表单生成 systemd .service unit 文件。
AI11
Token 计数器
使用 js-tiktoken 估算文本 token 数，支持多种编码。
Prompt 构建器
模板化组装 Prompt，支持保存草稿到本地。
Prompt 对比
两版 Prompt 差异高亮，直观对比变化。
RAG 分块计算器
估算 chunk 数量与 token 分布。
AI 成本计算器
主流模型价格 × token 数 → 成本估算。
LLM 请求构建器
表单生成 OpenAI 兼容请求 JSON / curl 命令。
AI Customer Reply
AI-powered customer service reply generator in 9 languages with tone control.
AI Product Description
AI generates ecommerce product titles, descriptions and SEO tags. Multi-language.
AI Review Responder
Generate empathetic, professional replies to negative customer reviews.
AI SEO Optimizer
Optimize product titles, descriptions and tags for Shopee, Amazon and others.
AI WhatsApp Reply
Generate 3 WhatsApp auto-reply templates for common customer scenarios.
Text17
Text Suite
文本工具合集：大小写、替换、排序、去重、统计等。
Text Stats
统计文本字符数、字数、行数、字节大小与频率。
Text Deduper
文本去重：按行/分隔符，大小写、排序、统计。
Dedup & Sort Diff
文本去重后排序 DIFF：对比差异高亮。
Text Cipher
使用 AES/TripleDES/Rabbit/RC4 加密/解密文本。
Text Case Converter
转换文本大小写：大写/小写/驼峰/下划线等。
Text Replacer
批量查找替换文本，支持正则。
Text Sorter
按行排序文本：字母/长度/数字。
Line Numbers
为文本添加/移除行号。
Text to HTML
将纯文本转换为 HTML（段落/换行/转义）。
Symbol Picker
常用符号/特殊字符速查复制。
Emoji Picker
Emoji 表情速查与复制。
Fancy Text Generator
生成花式/装饰文本样式。
Text Typesetter
文本排版：中英文间距、标点规范化。
Text Similarity
计算两段文本的相似度。
Text Workflow
组合多个文本处理步骤为流水线。
Random Text Generator
生成随机文本/字符串。
Image9
QR Code Generator
Generate QR codes for URLs, text, and more. Customizable size and color.
WiFi QR Code Generator
Generate and download QR codes for quick WiFi connection.
Image Compressor
Compress and resize JPG, PNG, WebP images locally.
Image Resizer & Cropper
Resize, crop, and convert images. Batch processing support.
Image Format Converter
Convert images between JPG, PNG, and WebP formats.
Image Watermark Tool
Add text watermarks to images. Custom position, opacity, and rotation.
Image Joiner
Join multiple images vertically or horizontally. Supports drag sorting and auto alignment.
Image to ASCII Art
Convert images to ASCII art with customizable options.
Color Hunt
Explore palettes, copy colors, CSS vars, and gradients.
Crypto & Security10
Hash Tools
计算 SHA-1/256/512、HMAC、CRC32。
HMAC Generator
使用密钥与哈希函数计算 HMAC。
Bcrypt
使用bcrypt进行哈希与比较，支持轮次设置。
RSA Keygen
生成随机 RSA 私钥/公钥（PEM）。
Password Generator
Generate strong passwords with customizable character sets and length.
OTP Generator
Generate and verify Time-based One-Time Passwords (TOTP) for Multi-Factor Authentication.
BIP39 Generator
随机或指定生成助记符，助记符+短语派生种子。
ULID Generator
生成词典可排序的通用唯一标识符（ULID）。
Token Generator
Generate random tokens with custom alphabets and length.
UUID 生成器
生成 RFC 4122 v4 UUID，支持批量、大写、去除连字符。
Network & Chat7
Finance33
Mortgage Calculator
Calculate monthly payments for Commercial, Provident Fund, and Combination loans.
Investment Return Calculator
Calculate compound interest with regular contributions and frequency settings.
ROI Calculator
Calculate Return on Investment (ROI) and Annualized ROI.
Domain Valuation
Estimate domain market value based on length, TLD, and keywords.
Margin Calculator
Calculate profit margin and markup from cost and selling price instantly.
Discount Calculator
Calculate discounted prices and savings instantly. Works both ways: percent off or final price.
Break-even Calculator
Calculate break-even units and revenue. Find how many units you need to sell to cover all costs.
Tip Calculator
Calculate tip amount and split bills between multiple people. Works for restaurants, deliveries, and services.
Size Converter
Convert shoe and clothing sizes between US, EU, UK and Asian sizing systems instantly.
Seller Profit Calculator
Calculate net profit from selling online including all platform fees, shipping and ad costs.
Marketplace Fee Calculator
Calculate platform commissions, payment fees and net payout for Shopee, TikTok Shop, Lazada, Amazon.
VAT Calculator
Calculate VAT/PPN/GST for any country. Add or remove VAT from prices instantly.
Currency Calculator
Convert between USD, EUR, GBP, IDR, VND, PHP, SAR, AED, BRL and more currencies.
Time Zone Converter
Convert times between major world cities. Find overlapping meeting times across time zones.
Import Duty Calculator
Estimate customs duty and import tax for cross-border shipments worldwide.
Invoice Generator
Create professional invoices instantly. Add line items, tax and discount. Download or copy.
Freelancer Rate Calculator
Calculate how much to charge as a freelancer. Set your target income and we work backwards.
Shipping Box Optimizer
Find the cheapest box size that fits your items. Saves money on ecommerce shipping.
Product Cost Breakdown
Break down your product cost into materials, labor, packaging, shipping, fees and more.
Business Name Checker
Check if your store name fits the rules of Shopee, TikTok Shop, Tokopedia, Lazada, Amazon.
HS Code Lookup
Search harmonized tariff codes (HS codes) and see duty rates for major destinations.
Contract Template Generator
Generate a professional service agreement template for freelancers and SMBs.
Time Tracker
Track billable hours with project names and hourly rates. Export to text.
Zakat Calculator
Calculate Zakat (Islamic alms) on wealth, gold, cash, investments. Gold or silver nisab.
Holiday Calendar
Public, religious and national holidays for Indonesia, Saudi, Philippines, Brazil and more.
PPh 21 Calculator (Indonesia)
Calculate Indonesian personal income tax (PPh 21) with progressive brackets and PTKP.
SSS / PhilHealth / Pag-IBIG Calculator
Calculate mandatory SSS, PhilHealth, and Pag-IBIG contributions for Philippine employees.
VAT Reverse Calculator
Extract base price from VAT-inclusive total. Supports Saudi Arabia, UAE, Indonesia, Vietnam, UK.
Packing List Generator
Generate cross-border packing lists with HS codes, quantities and values. Export to text.
Repricing Tool
Calculate optimal selling price based on competitor pricing, your costs and pricing strategy.
FX Spread Calculator
Compare exchange rates and fees across PayPal, Wise, banks, Stripe and others.
Keyword Generator
Generate long-tail keywords for ecommerce SEO. Covers fashion, electronics, beauty and home.
Business Registration Guide
Step-by-step guides for registering a business in Indonesia, Saudi, Philippines, UAE, Vietnam, Brazil.
Life7
Perpetual Calendar
Comprehensive calendar with Chinese Lunar date, Solar terms, and festivals.
Date Diff
计算两个日期的差值：多少天与多少周。
Chinese Kinship Calculator
Calculate Chinese relative titles and relations.
福利彩票 · 双色球
随机生成6红球(1-33)和1蓝球(1-16)。
English Name Generator
Generate English names based on your Chinese name.
Calculator
基础/科学计算器：四则运算、函数、角度/弧度。
I18n Manager
管理与对比多语言翻译文案。
Games1
Web310
钱包地址解析
验证以太坊地址格式，解析 EIP-55 checksum 状态。
ENS 查询
正向/反向解析 ENS 域名与以太坊地址。
Gas Tracker
查询当前以太坊 Gas 价格（低/中/高建议）。
哈希识别
识别哈希类型（ETH/BTC TXID、ENS Namehash、IPFS CID、UUID）。
Token 授权查询
查询地址的 Token 授权额度，识别无限授权。
Token 风险扫描
分析 ERC-20 合约风险：Mint 函数、Owner 权限、交易税等指标。
交易解码器
输入交易哈希，解码交易详情：from/to/value/input data/logs。
代币持有者分析
分析 ERC-20 代币 Top 持有者分布，基于转账记录估算。
钱包资产查询
查询以太坊钱包的 ETH 余额和 ERC-20 代币持有情况。
巨鲸追踪
追踪链上大额 ERC-20 转账，发现巨鲸动向。