{"slug": "i-built-freedevutils-60-free-in-browser-developer-tools-using-github-copilot-an", "title": "I Built FreeDevUtils — 60+ Free In-Browser Developer Tools using github copilot an google gemini pro for developer community", "summary": "A developer built FreeDevUtils, a collection of 60+ free in-browser developer tools that run entirely client-side, using GitHub Copilot and Google Gemini Pro. The toolbox includes a Postman-like API testing tool, UML diagram builder, log parser, and various media and data conversion utilities, all without ads, trackers, or server uploads. The open-source project is available at freedevutils.github.io.", "body_md": "Hey Dev Community 👋\n\nI'm excited to finally share **FreeDevUtils** — a big collection of **60+ completely free developer tools** that run **entirely in your browser**.\n\n###\nWhy I Built This\n\nI got tired of:\n\n- Jumping between 10 different websites\n- Dealing with ads and trackers\n- Tools that require signups or send data to servers\n\nSo I decided to create **one single toolbox for developer community** with all the utilities we use in daily life .\n\n###\n✨ Key Highlights\n\n**🔥 Standout Tools**\n\n-\n**Restify** — Full Postman-like API testing tool (headers, params, body, collections, curl export)\n-\n**UML Class Diagram Builder**, **Flowchart Designer**, **Architecture Diagram Builder**\n-\n**Log Parser & Analyzer** — Auto-detect and analyze application logs\n-\n**AI Prompt Builder** — Craft better prompts for ChatGPT, Claude, Gemini, Cursor etc.\n**Docker Compose Visualizer**\n-\n**Subnet Calculator** (IPv4 & IPv6)\n-\n**HAR Analyzer**, **Swagger/OpenAPI Viewer**, **Postman Collection Viewer**\n\n**Media & File Tools**\n\n- Image Compression & Resizer (50-80% size reduction)\n- Images to PDF, GIF Animator, Icon Generator\n- QR Code Generator + Scanner, Barcode Generator\n- Voice & Video Recorder\n- Zip/Unzip files client-side\n- Screenshot Annotator\n\n**Data & Conversion Tools**\n\n- JSON, YAML, XML, CSV converters & beautifiers\n- CSV ↔ JSON, CSV/Excel → SQL\n- Base64, URL, HTML encode/decode\n- File Comparison tool\n\n**Other Useful Tools**\n\n- Code Playground (HTML/CSS/JS with live preview)\n- Regex Tester, Cron Expression Builder\n- JWT Decoder, SSL Certificate Checker\n- Faker & Random Data Generator\n- Password Generator + Strength Tester\n- Timestamp converters, Text Statistics, Unicode Inspector, and many more...\n\n###\nTry It Here\n\n👉 [https://freedevutils.github.io](https://freedevutils.github.io)\n\nAll tools are **client-side** — nothing is uploaded to any server.\n\n###\nTech Stack\n\n- Built with vanilla JavaScript + modern web APIs\n- Fully responsive\n- Open source (GitHub link below)\n\n###\nWhat's Next?\n\nI'm planning to keep adding more tools based on community feedback if they follow projects vision.\n\nWould love to hear from you:\n\n- Which tool did you find most useful?\n- What tool should I add next?\n- Any bugs or suggestions?\n\nDrop your feedback in the comments 👇\n\n**Try FreeDevUtils**: [https://freedevutils.github.io](https://freedevutils.github.io)", "url": "https://wpnews.pro/news/i-built-freedevutils-60-free-in-browser-developer-tools-using-github-copilot-an", "canonical_source": "https://dev.to/pranaysmokal/i-built-freedevutils-60-free-in-browser-developer-tools-using-github-copilot-an-google-gemini-4je7", "published_at": "2026-05-27 13:27:52+00:00", "updated_at": "2026-05-27 13:40:31.100815+00:00", "lang": "en", "topics": ["ai-tools", "ai-products", "generative-ai", "large-language-models", "artificial-intelligence"], "entities": ["FreeDevUtils", "GitHub Copilot", "Google Gemini Pro", "Postman", "ChatGPT", "Claude", "Gemini", "Cursor"], "alternates": {"html": "https://wpnews.pro/news/i-built-freedevutils-60-free-in-browser-developer-tools-using-github-copilot-an", "markdown": "https://wpnews.pro/news/i-built-freedevutils-60-free-in-browser-developer-tools-using-github-copilot-an.md", "text": "https://wpnews.pro/news/i-built-freedevutils-60-free-in-browser-developer-tools-using-github-copilot-an.txt", "jsonld": "https://wpnews.pro/news/i-built-freedevutils-60-free-in-browser-developer-tools-using-github-copilot-an.jsonld"}}