I Built 30+ Free Online Tools with Vanilla JS – No Frameworks, No Signup
Why I Built This
As a developer, I constantly need quick utilities: formatting JSON, encoding base64, counting words, compressing images…
Most “free” tools out there:
Force you to sign up
Are bloated with ads
Send your data to their servers
Use heavy frameworks that slow everything down
So I built Vaultool – a collection of 30+ free online tools that run 100% in your browser.
What It Does
Vaultool includes tools for:
Developers:
JSON Formatter / Validator
Base64 Encode / Decode
Regex Tester
Color Picker / Converter
JWT Decoder
Everyone:
Word Counter
Image Compressor (lossless)
PDF Tools
Text Diff Checker
QR Code Generator
🔗 Live: https://vaultool.com
Key Features
Privacy-First
Everything runs client-side. No data leaves your device. No tracking, no analytics, no ads.Zero Dependencies
Built with vanilla JavaScript – no React, no Vue, no Angular. Just fast, clean code.No Signup Required
Every tool is free and instant. No email, no credit card, no account.Open Source (Partially)
I’ve open-sourced 4 core tools:
json-formatter
base64-converter
word-counter
image-compressor
Each is a single HTML file with zero dependencies – drop it on any server and it works.
Tech Stack
Frontend: Vanilla JS + CSS
Build: None (intentionally)
Hosting: Static files on CDN
No frameworks. No bundlers. No nonsense.
Lessons Learned
Vanilla JS is Still Powerful
You don’t need React for everything. For tool-style apps, vanilla JS is often faster and simpler.Privacy is a Feature
People love that their data doesn’t leave their device. It’s a selling point.Developer Experience Matters
Fast load times, clean UI, and no signup friction = happy users.
Try It Out
🔗 https://vaultool.com
I’d love your feedback! What tools should I add next? What could be improved?
Tags: #webdev #javascript #tools #privacy #opensource
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