I got tired of googling "free JSON formatter" every other day, so I built FreeToolBoxes.com — a collection of 60+ free browser-based tools. No signup, no downloads, no tracking. Everything runs client-side.
Here's the breakdown by category:
🛠️ Developer Tools
These are the ones I reach for daily:
- JSON Formatter — Paste messy JSON, get it pretty-printed
- JSON Validator — Find exactly where your JSON is broken
- Base64 Encoder/Decoder — Encode/decode strings instantly
- JWT Decoder — Inspect JWT tokens without installing anything
- Regex Tester — Test patterns with real-time matching
- Cron Generator — Build cron expressions visually
- Hash Generator — MD5, SHA-1, SHA-256 hashing
- CSS Minifier — Shrink your CSS
- JS Minifier — Minify JavaScript
- HTML Encoder/Decoder — Escape/unescape HTML entities
- CSV to JSON / JSON to CSV — Convert between formats
- DNS Lookup — Check DNS records for any domain
- IP Lookup — Geolocation and ISP info
🎨 Design & Color Tools
- Color Picker — Pick colors, get HEX/RGB/HSL
- Color Palette Generator — Generate harmonious palettes
- Gradient Generator — CSS gradients with live preview
- Favicon Generator — Create favicons from images or text
🖼️ Image Tools
- Image Resizer — Resize without uploading anywhere
- Image Compressor — Reduce file size in-browser
- Image Cropper — Crop with custom dimensions
- Base64 Image Encoder — Convert images to data URIs
📝 Text Tools
- Word Counter — Words, characters, sentences, reading time
- Case Converter — UPPER, lower, Title, camelCase, etc.
- Lorem Ipsum Generator — Placeholder text on demand
- Markdown Preview — Live markdown rendering
- Text Diff — Compare two blocks of text
- Slug Generator — URL-friendly slugs from any text
🔢 Math & Utility
- Percentage Calculator — All percentage math in one place
- Unit Converter — Length, weight, temperature, etc.
- BMI Calculator — Quick health check
- Age Calculator — Exact age from birthdate
- Aspect Ratio Calculator — For responsive design math
🔐 Validators & Converters
- Credit Card Validator — Luhn check for testing
- IBAN Validator — Validate international bank numbers
- Currency Converter — Live exchange rates
- Binary/Hex/Decimal Converter — Number base conversions
- ASCII Converter — Text to ASCII and back
The Stack
Deliberately simple:
- Pure HTML/CSS/JS — no frameworks, no build step
- Cloudflare Pages — free hosting, global CDN
- Client-side only — your data never leaves your browser
Total hosting cost: $0/month
Why I Built This
Every time I needed a quick tool, I'd land on some site that wanted me to sign up, watch an ad, or "upgrade to Pro" to unlock basic features. So I built the tools I actually use and put them all in one place.
The whole thing is open and free. If there's a tool you wish existed, drop a comment — I'll probably build it this week.
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