I Built 100 Free Browser-Based Developer Tools — No Signup, No Tracking

I just hit a milestone: 100 free developer and productivity tools, all running entirely in your browser.

🔗 toolpile.tools

Why I Built This

Every time I needed a quick JSON formatter, a base64 encoder, or a color converter, I'd land on some ad-infested site that wanted me to sign up, enable notifications, and accept 47 cookies.

So I built my own. Then kept going.

What's Inside (100 Tools)

Here's a sample across categories:

🛠️ Developer Tools

• JSON Formatter — Pretty-print & validate JSON
• Regex Tester — Live pattern matching with explanations
• JWT Decoder — Decode JWT tokens without sending them anywhere
• CSS Flexbox Generator — Visual flex layout builder
• Cron Parser — Human-readable cron schedule explanations
• Git Ignore Generator — .gitignore templates for any stack

🔐 Security & Encoding

• Password Generator — Cryptographically strong passwords
• Hash Generator — SHA-256, MD5, SHA-512
• Base64 Encoder — Encode/decode Base64 strings

🎨 Design & CSS

• Color Converter — HEX ↔ RGB ↔ HSL
• Image Color Extractor — Extract dominant colors from any image
• Font Pair Generator — Beautiful Google Fonts pairings
• Box Shadow Generator — Visual CSS box-shadow builder

💰 Calculators

• Mortgage Calculator — Monthly payments + amortization
• Compound Interest — Visualize investment growth
• Calorie Calculator — TDEE & macro breakdown
• BMI Calculator — With visual health ranges

📝 Text & Content

• Word Counter — Characters, words, sentences, reading time
• Text to Speech — Browser-based TTS with voice selection
• Markdown to HTML — Live preview converter
• Reading Time Calculator — Estimate read time for blog posts

...and 80 more.

The Rules

Every tool follows these principles:

1. No signup — Just use it
2. No tracking — No analytics cookies, no data collection
3. No server — Everything runs in your browser via vanilla JS
4. No dependencies — Zero npm packages, zero CDN calls
5. Dark theme — Easy on the eyes
6. Mobile friendly — Works on any device

Tech Stack

Intentionally boring:

• Static HTML/CSS/JS
• GitHub Pages hosting
• Zero frameworks, zero build steps
• Each tool is a single self-contained HTML file

What's Next

Planning to add more tools based on search volume data. If you have a tool you keep searching for and can never find a clean version of, drop it in the comments.

Check it out → toolpile.tools