I built 50 free developer tools – JSON, regex, JWT, SQL and more

Lee — Mon, 23 Mar 2026 06:53:23 +0000

Why I built this
As a developer, I constantly find myself searching for quick online tools – JSON formatters, regex testers, base64 encoders. Most existing tools are cluttered with ads or require signups. So I built my own.
What I built
ToolsForDev is a collection of 50 free browser-based developer tools. Everything runs client-side – no data leaves your browser, no signup required, no ads.
👉 https://toolsforcode.com
Tools available
JSON & Data

JSON Formatter & Validator
JSON Minifier
JSON to CSV Converter
CSV to JSON Converter
JSON to YAML Converter
JSON Schema Generator
JSON Compare (deep diff)
JSONPath Tester
XML Formatter
SQL Formatter
Text Diff Checker

Encoding & Hashing

Base64 Encoder/Decoder
Base32 Encoder/Decoder
URL Encoder/Decoder
HTML Encoder/Decoder
Unicode Converter
MD5 / SHA Hash Generator
Hash Generator (MD5, SHA-1, SHA-256, SHA-512)
Image to Base64

Security & Crypto

JWT Decoder (with expiry check)
JWT Generator (HS256)
JWT Signature Verifier
TOTP Generator (2FA codes)
Bcrypt Hash Generator
Password Generator (with strength meter)

Generators

UUID v4 Generator
Lorem Ipsum Generator
QR Code Generator

Text & Markdown

Word Counter (with reading time)
Regex Tester (real-time highlighting)
Markdown Preview
Markdown to HTML Converter
HTML Live Preview
String Utilities (camelCase, snake_case, slug...)

Developer Utilities

Unix Timestamp Converter
Epoch Time Converter
Cron Expression Parser
Number Base Converter (binary/hex/octal)
Color Converter (HEX/RGB/HSL)
HEX to RGB Converter
CSS Minifier
HTTP Status Codes Reference
ASCII Converter
URL Parser
cURL to Code Converter (JS/Python/Java)
DNS Lookup
IP Address Lookup
IP Address Converter
chmod Calculator

Image & Media

Image Resizer (client-side, no upload)

Tech stack

Frontend: Nuxt 3 + Vue 3
Deployment: Vercel (free tier)
Cost: $0/month

What I learned

Nuxt 3 is great for SEO – SSR out of the box, no extra config needed
Most dev tools need zero backend – JSON parsing, encoding, hashing all run natively in the browser
Speed matters – The site scores 100/100 on Vercel Speed Insights
Start small, ship fast – Built the first 6 tools in one day, kept adding from there

Try it
👉 https://toolsforcode.com
All 50 tools are free, no signup required, no ads, no tracking. Would love feedback on what tools are most useful or what's missing!

DEV Community: Lee

I built 50 free developer tools – JSON, regex, JWT, SQL and more