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

> Source: <https://dev.to/pranaysmokal/i-built-freedevutils-60-free-in-browser-developer-tools-using-github-copilot-an-google-gemini-4je7>
> Published: 2026-05-27 13:27:52+00:00

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 signups or send data to servers

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

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✨ 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**
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**Subnet Calculator** (IPv4 & IPv6)
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**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](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 projects 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](https://freedevutils.github.io)