The latest articles on DEV Community by karim narimi (@karim_narimi_816b50e84001). https://dev.to/karim_narimi_816b50e84001 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%2F3848213%2Fc73783c5-9b35-4f97-9c6f-495d5564ecc2.png https://dev.to/karim_narimi_816b50e84001 en karim narimi Sat, 28 Mar 2026 20:04:53 +0000 https://dev.to/karim_narimi_816b50e84001/i-built-7-free-browser-based-tools-no-signup-required-heres-what-i-learned-4h9e https://dev.to/karim_narimi_816b50e84001/i-built-7-free-browser-based-tools-no-signup-required-heres-what-i-learned-4h9e <p>After months of building, I just launched AAWebTools — a collection of free web tools that run entirely in your browser.</p> <h2> What I built </h2> <p>7 tools, zero signups required:</p> <ul> <li>🎵 TikTok Video Downloader — no watermark, HD quality</li> <li>🐦 Twitter/X Video Downloader</li> <li>📄 Free Invoice Generator — 5 PDF templates, EN/FR support, international tax compliance</li> <li>🤖 AI Content Detector — pure JS perplexity scoring, no API cost</li> <li>✍️ AI Text Humanizer — Claude API backend</li> <li>💰 Pay Stub Generator — supports USA, Canada, UK, France, Germany, Australia, Morocco</li> <li>🖼️ Image Toolkit — compress, convert to WebP/AVIF, resize with social media presets — images never leave your browser</li> </ul> <h2> The tech stack </h2> <p>Pure HTML5 + Vanilla JS frontend (no React, no frameworks). Node.js backend only for the downloaders. Python container ready for future tools. Docker on a Hostinger VPS.</p> <p>No frameworks = sub-1-second load time on all pages. Lighthouse 90+ across the board.</p> <h2> The privacy-first decision </h2> <p>The image toolkit was the most interesting challenge. Instead of sending files to a server (like TinyPNG does), everything runs client-side using the Canvas API and browser-image-compression library. Images never touch our server.</p> <p>This was actually faster than server-side processing for most users because there's no upload/download round trip.</p> <h2> What's live now </h2> <p><a href="https://aawebtools.com" rel="noopener noreferrer">https://aawebtools.com</a></p> <p>All tools are live, free, and working. Would love feedback from the dev community — especially on the image toolkit and AI detector.</p> <p>What free tools do you find yourself reaching for most often?</p> webdev javascript showdev opensource