The latest articles on DEV Community by liljonjohnson-crypto (@liljonjohnsoncrypto). https://dev.to/liljonjohnsoncrypto https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3965560%2F17b9d6aa-21b5-4cef-87a4-7a1a45f3045b.png https://dev.to/liljonjohnsoncrypto en liljonjohnson-crypto Wed, 03 Jun 2026 02:22:18 +0000 https://dev.to/liljonjohnsoncrypto/i-built-21-free-dev-tools-that-never-upload-your-data-p56 https://dev.to/liljonjohnsoncrypto/i-built-21-free-dev-tools-that-never-upload-your-data-p56 <p>Every developer needs quick tools — JSON formatter, Base64 encoder, JWT decoder, regex tester, PDF compressor, GIF maker. But I always hesitated to paste sensitive data into random tool sites. Where does that data go?</p> <p>So I built ToolsStack — 21 tools that run 100% in your browser.</p> <p>The tools<br> 💻 Developer: JSON Formatter, JSON→CSV, Base64, URL Encode, HTML Entities, JWT Decoder, SQL Formatter, Regex Tester, Hash Generator (MD5/SHA), Diff Checker, PDF Compressor, PDF→JPG</p> <p>⚡ Generators: UUID, Password, Lorem Ipsum</p> <p>📝 Text: Word Counter, Case Converter, Markdown Preview</p> <p>🎨 Image: Color Picker, QR Code Generator, GIF Maker</p> <p>Why another tool site?<br> 100% client-side — nothing leaves your browser<br> No signup, no ads, no tracking<br> Vanilla JS + Canvas API — no bloated frameworks<br> Deployed on Cloudflare Pages — fast everywhere<br> Try it: toolsstack.org</p> <p>Source on GitHub (update with actual repo)</p> <p>I'd love to know what tools you'd want added next!</p> javascript webdev tools productivity