I Built FreeDevUtils — 60+ Free In-Browser Developer Tools using github copilot an google gemini pro for developer community

Source: Dev.to

Introduction

Hey Dev Community 👋

I’m excited to finally share FreeDevUtils — a big collection of 60+ completely free developer tools that run entirely in your browser.

Why I Built This

I got tired of:

• Jumping between 10 different websites
• Dealing with ads and trackers
• Tools that require sign‑ups or send data to servers

So I decided to create one single toolbox for the developer community with all the utilities we use daily.

Key Highlights

Standout Tools

• Restify – Full Postman‑like API testing tool (headers, params, body, collections, cURL export)
• UML Class Diagram Builder, Flowchart Designer, Architecture Diagram Builder
• Log Parser & Analyzer – Auto‑detect and analyze application logs
• AI Prompt Builder – Craft better prompts for ChatGPT, Claude, Gemini, Cursor, etc.
• Docker Compose Visualizer
• Subnet Calculator (IPv4 & IPv6)
• HAR Analyzer, Swagger/OpenAPI Viewer, Postman Collection Viewer

Media & File Tools

• Image Compression & Resizer (50–80 % size reduction)
• Images to PDF, GIF Animator, Icon Generator
• QR Code Generator + Scanner, Barcode Generator
• Voice & Video Recorder
• Zip/Unzip files client‑side
• Screenshot Annotator

Data & Conversion Tools

• JSON, YAML, XML, CSV converters & beautifiers
• CSV ↔ JSON, CSV/Excel → SQL
• Base64, URL, HTML encode/decode
• File Comparison tool

Other Useful Tools

• Code Playground (HTML/CSS/JS with live preview)
• Regex Tester, Cron Expression Builder
• JWT Decoder, SSL Certificate Checker
• Faker & Random Data Generator
• Password Generator + Strength Tester
• Timestamp converters, Text Statistics, Unicode Inspector, and many more…

Try It Here

👉 https://freedevutils.github.io

All tools are client‑side — nothing is uploaded to any server.

Tech Stack

• Built with vanilla JavaScript + modern Web APIs
• Fully responsive
• Open source (GitHub link below)

What’s Next?

I’m planning to keep adding more tools based on community feedback if they follow the project’s vision.

Would love to hear from you:

• Which tool did you find most useful?
• What tool should I add next?
• Any bugs or suggestions?

Drop your feedback in the comments 👇

Try FreeDevUtils: https://freedevutils.github.io