This is a submission for the GitHub Finish-Up-A-Thon Challenge
What I Built
This project began as a small collection of developer tools within my personal portfolio on January 10, 2026. Over time, I decided to make it publicly available for the entire developer community and made it public on 18-05-2026 with 52 tools since then added 14 more.
This is my small contribution to the developer community, and in turn, a contribution to society directly or indirectly.
Today, it has grown into a comprehensive collection of 65+ developer utilities designed to help developers with everyday tasks.
What makes it different?
More advanced features and improved tools.
No backend infrastructure.
No sign-up or login required.
Fully client-side application.
Free for everyone.
No rate limits.
100% secure you can also open n/w tab and check.
Tools gives lot but depending on your browser capacity.
Not just free for developers but for everyone around the globe.
Feedback, suggestions and any kind of contributions are always welcome.
What it contains ?
API & Network Tools
Restify **- Rest API Testing Tool
**Swagger/OpenAPI Viewer
Postman Collection Viewer
HAR File Explorer:
JWT Decoder:
Advanced IPv4 & IPv6 Subnet Calculator
SSL Certificate Checker
🏗️ Architecture & Diagramming -( i tried to preserve engineering discipline)
Architecture Diagram Builder
Entity Relationship Diagram Designer
UML Class Diagram Builder
Flowchart Diagram Designer
Docker Compose Visualizer
🔄 Data & Format Converters
JSON Pretty Print/Minify
XML Pretty Print
SQL Beautifier
CSV Viewer & Search
Format Converters: Switch seamlessly between formats using the CSV to JSON, JSON to CSV, YAML ↔ JSON, and XML ↔ JSON converters.
CSV To SQL: Convert CSV files into DDL/DML scripts for various databases.
Spring Boot Properties Converter
🔐 Security, Crypto & Encoders
Password Generators & Strength Testers:
Encryption Tools: Encrypt and decrypt text using the AES Encrypt/Decrypt and Advanced and legacy Jasypt Encrypt/Decrypt tools.
Hashing & Checksums (MD5/SHA1/SHA256) and verify files with the File Checksum Calculator.
Encoders/Decoders: Translate data with the Base64, URL, and HTML Encode/Decode tools.
📝 Code, Text & Dev Utilities
Code Playground: HTML, CSS, and JavaScript with live preview with code assist and syntax highlighting.
Code Minifiers: Reduce file sizes using the JavaScript Minifier and HTML Minifier, XML minifier.
Log Parser & Analyzer
File Comparison: Compare two files and highlight differences.
Regex Tester & Highlighter
Text Analysis: Analyze text using Text Statistics, manipulate it with the String Case Converter, and inspect hidden data using the Unicode Inspector and Invisible Character Viewer.
🛠️ Generators & Mock Data
Data Generators: Populate your apps using the Faker Generator, Random Data Generator, and UUID Generator.
AI Prompt Builder: Create optimized prompts for ChatGPT, Claude, Gemini, Cursor, and GitHub Copilot(Need improvements).
Scanners & Codes: Generate and read codes using the QR Code Generator, QR Code Scanner, and Barcode Generator.
🎨 Media, Files & Audio/Video
File Management: Image Compression & Resizer, Zip/Unzip Tool, Archive Maker(.tar, .gz, .tar.gz compression).
Images to PDF, Image to Base64, and generate documents with the PDF/DOCX Generator.
Media Utilities: Annotate screenshots + compress with the Screenshot Annotator, create animations with the GIF Animated Generator, and download files using the Google Drive Downloader. Create assets with the Icon Generator, Color Picker, and Gradient Generator.
Audio & Video: Record media natively using the Voice Recorder and Video Recorder, or translate audio using the Text to Speech and Speech to Text converters.
⏱️ Time & Scheduling
Timestamp ↔ Date Converter
Date & Time Difference Calculator:
Cron Expression Builder
Since I work on it only during weekends and holidays, progress is gradual, but the project continues to grow steadily with every release.
Feedback, suggestions, and contributions are always welcome.
Demo
https://freedevutils.github.io
The Comeback Story
I built all of the tools from scratch with significant assistance from AI-powered development tools. GitHub Copilot played the primary role in code generation, contributing roughly 80% of the codebase, while ChatGPT helped in prompt engineering, output validation and Google Gemini Pro helped with UI design ideas, enhancement, and code refinements for the advanced tools.
now github copilot helping me in making the project multilingual.
A small confession about this project. 😄
I built all 65+ utilities using free-tier AI tools.
GitHub Copilot Free.
ChatGPT Free.
Google Gemini Pro came bundled with my Jio SIM plan
So before GitHub Copilot decides to revoke my coding privileges after reading this... 😅
here is my argument- At least I'm not burning tokens teaching AI to build the thousands of clone of a falling-block game. I'm spending them building productivity tools that will be used by next generation of developers can use to solve real problems.
The current 65+ utilities are just the foundation. The next chapter is adding AI-powered capabilities and creating the developer tools of tomorrow and that too without using backend.
The reality is that AI can generate code, but it can't provide the vision, persistence, debugging, countless iterations, feature decisions, testing, documentation, and weekend hours required to turn ideas into a usable product.
The tools were free.
The time was not.
This project exists because of many weekends, holidays, and late-night sessions spent building something useful for the developer community. Progress is slow, but every release adds a little more value for the next developer who uses it.
My Experience with GitHub Copilot
GitHub Copilot has been an incredible development companion throughout this project. It helped transform ideas into working code faster, generated high-quality implementations, and assisted in overcoming countless technical challenges along the way.
What once took hours of boilerplate coding could be accomplished in minutes, allowing more time to focus on architecture, user experience, problem-solving, and refining features.it would have taken years to build those that I accomplished within month.
The real superpower is not AI itself—it's the combination of human imagination and AI assistance. When a developer can clearly envision something, tools like Copilot help carve that vision into reality.
For this project, Copilot wasn't just a code generator; it was the lightsaber which cut down each and every challenge into half.
From lightsaber i realized if you are star wars fan and you were missing master yoda's wisdom see release notes there is something special added for you with every release.
https://freedevutils.github.io/release-notes/
Enjoy tools , progress and Prosper.
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