The latest articles on DEV Community by zen zz (@zen_zz_3dd554c9c7d317d4f2). https://dev.to/zen_zz_3dd554c9c7d317d4f2 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3954322%2F49a41ed1-3db3-4415-9a27-ecdf638ed3ee.png https://dev.to/zen_zz_3dd554c9c7d317d4f2 en zen zz Wed, 27 May 2026 12:44:32 +0000 https://dev.to/zen_zz_3dd554c9c7d317d4f2/calchub-20-free-financial-calculators-private-accurate-7-languages-59e7 https://dev.to/zen_zz_3dd554c9c7d317d4f2/calchub-20-free-financial-calculators-private-accurate-7-languages-59e7 <h2> What is CalcHub? </h2> <p><a href="https://calc-hub-2c7.pages.dev" rel="noopener noreferrer">CalcHub</a> is a comprehensive suite of 20+ free financial calculators. All calculations run locally in your browser — your financial data never leaves your device.</p> <h2> Loan &amp; Mortgage Calculators </h2> <ul> <li> <strong>Mortgage Calculator</strong> — Monthly payments with full amortization schedule</li> <li> <strong>Loan Calculator</strong> — General-purpose loan payment calculator</li> <li> <strong>Auto Loan Calculator</strong> — Car loan with trade-in and tax options</li> <li> <strong>Student Loan Calculator</strong> — Repayment planning and strategies</li> <li> <strong>Credit Card Payoff</strong> — Calculate debt payoff timelines</li> </ul> <h2> Savings &amp; Investment Calculators </h2> <ul> <li> <strong>Compound Interest</strong> — Visualize the power of compounding</li> <li> <strong>Investment Calculator</strong> — Project returns and growth</li> <li> <strong>Savings Calculator</strong> — Regular savings with compound interest</li> <li> <strong>Retirement Calculator</strong> — Estimate retirement corpus needs</li> <li> <strong>ROI Calculator</strong> — Calculate return on investment</li> </ul> <h2> Tax &amp; Salary Calculators </h2> <ul> <li> <strong>Salary Calculator</strong> — Hourly, monthly, annual conversion</li> <li> <strong>Sales Tax Calculator</strong> — Calculate tax for any region</li> <li> <strong>Tip Calculator</strong> — Quick tip calculation and bill splitting</li> </ul> <h2> Key Features </h2> <ul> <li>Accurate results — bank-grade financial formulas</li> <li>100% Private — all calculations in your browser, zero data collection</li> <li>Visual charts — see loan breakdowns and investment growth curves</li> <li>7 Languages — English, Chinese, Japanese, Korean, Spanish, Portuguese, French</li> <li>Always free — no premium tiers, no usage limits</li> </ul> <p><a href="https://github.com/dongze1213/calc-hub" rel="noopener noreferrer">GitHub</a> | <a href="https://calc-hub-2c7.pages.dev" rel="noopener noreferrer">Live Site</a></p> tools zen zz Wed, 27 May 2026 12:40:28 +0000 https://dev.to/zen_zz_3dd554c9c7d317d4f2/ai-toolhub-15-free-ai-powered-utilities-no-api-keys-no-sign-up-1e92 https://dev.to/zen_zz_3dd554c9c7d317d4f2/ai-toolhub-15-free-ai-powered-utilities-no-api-keys-no-sign-up-1e92 <h2> What is AI ToolHub? </h2> <p><a href="https://ai-toolhub.pages.dev" rel="noopener noreferrer">AI ToolHub</a> is a collection of 15 AI-powered utilities that run entirely in your browser. No API keys required, no sign-up, and zero data collection.</p> <h2> Tools Included </h2> <ul> <li> <strong>AI Text Generator</strong> - Generate creative text with AI assistance</li> <li> <strong>AI Prompt Generator</strong> - Create optimized prompts for AI models</li> <li> <strong>Password Generator</strong> - Generate secure random passwords</li> <li> <strong>Color Palette Generator</strong> - Create beautiful color palettes</li> <li> <strong>Meta Description Generator</strong> - Generate SEO-friendly meta descriptions</li> <li> <strong>Business Name Generator</strong> - Generate catchy business name ideas</li> <li> <strong>Email Generator</strong> - Generate professional email templates</li> <li> <strong>Hashtag Generator</strong> - Generate relevant social media hashtags</li> <li> <strong>Resume Summary Generator</strong> - Create professional resume summaries</li> <li> <strong>Slogan Generator</strong> - Generate catchy slogans and taglines</li> <li> <strong>Username Generator</strong> - Generate unique username ideas</li> <li> <strong>Quote Generator</strong> - Generate inspirational quotes</li> <li> <strong>Word Counter</strong> - Count words, characters, and paragraphs</li> <li> <strong>Grammar &amp; Style Check</strong> - Analyze text readability and style</li> <li> <strong>Text Stats</strong> - Detailed text statistics and analysis</li> </ul> <h2> Key Features </h2> <ul> <li>100% Private - everything runs locally in your browser</li> <li>No API keys or sign-up required</li> <li>Mobile friendly - works on all devices</li> <li>Always free - no premium tiers</li> <li>Instant results</li> </ul> <p><a href="https://github.com/dongze1213/ai-toolhub" rel="noopener noreferrer">GitHub</a> | <a href="https://ai-toolhub.pages.dev" rel="noopener noreferrer">Live Site</a></p> zen zz Wed, 27 May 2026 12:33:43 +0000 https://dev.to/zen_zz_3dd554c9c7d317d4f2/devtoolkit-14-free-browser-developer-tools-no-tracking-offline-7-languages-1jcd https://dev.to/zen_zz_3dd554c9c7d317d4f2/devtoolkit-14-free-browser-developer-tools-no-tracking-offline-7-languages-1jcd <h2> What is DevToolKit? </h2> <p><a href="https://devtools-site-301.pages.dev" rel="noopener noreferrer">DevToolKit</a> is a collection of 14 essential developer tools that run entirely in your browser. No server, no tracking, no sign-up required.</p> <h2> Tools Included </h2> <ul> <li> <strong>JSON Formatter</strong> - Format, validate, and beautify JSON</li> <li> <strong>Base64 Encoder/Decoder</strong> - Encode and decode instantly</li> <li> <strong>URL Encoder/Decoder</strong> - URL-encode and decode text</li> <li> <strong>JWT Decoder</strong> - Decode and inspect JWT tokens</li> <li> <strong>Timestamp Converter</strong> - Unix timestamps to dates</li> <li> <strong>UUID Generator</strong> - Generate UUID v4</li> <li> <strong>Hash Generator</strong> - MD5, SHA-1, SHA-256, SHA-512</li> <li> <strong>Diff Checker</strong> - Compare texts and find differences</li> <li> <strong>Markdown Preview</strong> - Live preview of Markdown</li> <li> <strong>CSS Gradient Generator</strong> - Create CSS gradients</li> <li> <strong>JSON ↔ CSV Converter</strong> - Convert between formats</li> <li> <strong>Lorem Ipsum Generator</strong> - Placeholder text</li> <li> <strong>Color Converter</strong> - HEX, RGB, HSL</li> <li> <strong>Regex Tester</strong> - Test regular expressions</li> </ul> <h2> Key Features </h2> <ul> <li>100% Private - all processing in your browser</li> <li>Works Offline after initial load</li> <li>7 Languages supported (English, Chinese, Japanese, Korean, Spanish, Portuguese, French)</li> <li>Always Free - no premium tiers, no usage limits</li> <li>No cookies, no analytics, no tracking</li> </ul> <p><a href="https://github.com/dongze1213/devtools-site" rel="noopener noreferrer">GitHub</a> | <a href="https://devtools-site-301.pages.dev" rel="noopener noreferrer">Live Site</a></p> devtools zen zz Wed, 27 May 2026 12:25:37 +0000 https://dev.to/zen_zz_3dd554c9c7d317d4f2/devtoolkit-14-free-browser-developer-tools-no-tracking-offline-7-languages-1njj https://dev.to/zen_zz_3dd554c9c7d317d4f2/devtoolkit-14-free-browser-developer-tools-no-tracking-offline-7-languages-1njj <h2> What is DevToolKit? </h2> <p><a href="https://devtools-site-301.pages.dev" rel="noopener noreferrer">DevToolKit</a> is a collection of 14 essential developer tools that run entirely in your browser. No server, no tracking, no sign-up required.</p> <h2> Tools Included </h2> <ul> <li> <strong>JSON Formatter</strong> - Format, validate, and beautify JSON</li> <li> <strong>Base64 Encoder/Decoder</strong> - Encode and decode instantly</li> <li> <strong>URL Encoder/Decoder</strong> - URL-encode and decode text</li> <li> <strong>JWT Decoder</strong> - Decode and inspect JWT tokens</li> <li> <strong>Timestamp Converter</strong> - Unix timestamps to dates</li> <li> <strong>UUID Generator</strong> - Generate UUID v4</li> <li> <strong>Hash Generator</strong> - MD5, SHA-1, SHA-256, SHA-512</li> <li> <strong>Diff Checker</strong> - Compare texts and find differences</li> <li> <strong>Markdown Preview</strong> - Live preview of Markdown</li> <li> <strong>CSS Gradient Generator</strong> - Create CSS gradients</li> <li> <strong>JSON ↔ CSV Converter</strong> - Convert between formats</li> <li> <strong>Lorem Ipsum Generator</strong> - Placeholder text</li> <li> <strong>Color Converter</strong> - HEX, RGB, HSL</li> <li> <strong>Regex Tester</strong> - Test regular expressions</li> </ul> <h2> Key Features </h2> <ul> <li>100% Private - all processing in your browser</li> <li>Works Offline after initial load</li> <li>7 Languages supported (English, Chinese, Japanese, Korean, Spanish, Portuguese, French)</li> <li>Always Free - no premium tiers, no usage limits</li> <li>No cookies, no analytics, no tracking</li> </ul> <p><a href="https://github.com/dongze1213/devtools-site" rel="noopener noreferrer">GitHub</a> | <a href="https://devtools-site-301.pages.dev" rel="noopener noreferrer">Live Site</a></p> <p>Tags: #devtools #webdev #javascript #productivity</p> productivity showdev tooling webdev