16款免费工具

免费开发者工具

SEO审计、代码转换器、政策生成器和AI计算器——专为独立开发者打造。无需注册。

SEO & Meta

Meta Tag / OG Preview

Preview how your site looks when shared on social media.

See exactly how your webpage will appear when shared on Twitter, Facebook, LinkedIn, and other platforms. Paste any URL to preview the title, description, and image that social networks will display. Catch missing or broken meta tags before you share.

Website SEO Checker

Run a 30-point SEO audit on any webpage.

JSON-LD Schema Generator

Generate structured data markup for better search results.

robots.txt Generator

Build a robots.txt file with a visual editor.

Sitemap XML Generator

Create a valid sitemap.xml from a list of URLs.

Developer

HTML to JSX Converter

Convert HTML to valid React JSX instantly.

Paste HTML and get valid React JSX output instantly. Automatically converts class to className, style strings to objects, self-closing tags, SVG attributes, and event handlers. Saves time when migrating HTML templates to React components.

Regex Tester

Test regular expressions with live highlighting.

JWT Decoder

Decode and inspect JWT tokens in your browser.

Timestamp Converter

Convert between Unix timestamps and human dates.

Tailwind Color Generator

Generate a full Tailwind color palette from one color.

Favicon Generator

Create favicons from custom text or initials.

Text Diff

Compare two texts and highlight the differences.

JSON Formatter & Validator

Format, minify, and validate JSON online.

Base64 Encoder / Decoder

Encode and decode Base64 strings online.

UUID Generator

Generate random UUID v4 strings online.

URL Encoder / Decoder

Encode and decode URL strings online.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes.

Generators

Privacy Policy Generator

Generate a GDPR/CCPA-compliant privacy policy.

Generate a privacy policy tailored to your website or app. Answer a few questions about your data practices and get a GDPR and CCPA-aware document you can customize. Covers data collection, cookies, third-party services, and user rights.

Terms of Service Generator

Generate terms of service for your SaaS.

QR Code Generator

Generate QR codes from any URL or text.

Word Counter

Count words, characters, sentences, and more.

AI Tools

SaaS Profit Calculator

Calculate your SaaS monthly profit and unit economics.

Input your SaaS metrics — monthly active users, paid conversion rate, subscription price, and per-user costs — to calculate MRR, ARR, gross margin, monthly profit, ARPU, LTV, and break-even point. A practical tool for indie hackers and SaaS founders.

RAG Chunk Previewer

Visualize how documents get split into RAG chunks.

AI Chatbot ROI Calculator

Calculate how much an AI support chatbot can save you.

Embedding Cost Calculator

Estimate OpenAI embedding costs for your documents.

Widget Code Generator

Generate embed code for chat widgets on any platform.

关于这些工具

本页面上的每款工具都是免费的，在浏览器中运行，无需注册账户。我们专为独立开发者、个人创业者和小型团队打造，帮助您快速完成SEO审计、代码转换、法律文档起草和AI管道工具等工作，无需企业级软件的繁琐。所有工具均为 LaunchChat 的一部分——一款将 Notion 文档转化为即时帮助中心的AI客服组件。