Free, simple, and fast online tools

No sign-ups, no bloat, and 100% private: everything runs directly inside your browser.

📝 Text & Developer Tools

Word & Character Counter

Count words, characters with and without spaces, lines, paragraphs, and estimated reading time in real time.

JSON Formatter & Validator

Validate, beautify (pretty print), or minify JSON data while pinpointing syntax errors accurately.

🧮 Everyday Calculators

Percentage Calculator

Calculate percentages of a number, find what percentage X is of Y, and compute percentage increases or discounts.

Date & Age Calculator

Find the exact difference between two dates, calculate your exact age, and count business working days.

🛡️ Networking & Security

IPv4 / CIDR Subnet Calculator

Get network address, broadcast address, subnet mask, wildcard mask, usable host range, and total hosts.

Secure Password Generator

Generate cryptographically strong passwords using crypto.getRandomValues and check entropy strength.

🖼️ Image Utilities

Image Compressor & Converter

Compress images and convert between JPG, PNG, and WebP using HTML5 Canvas with instant preview and download.

Image Resizer

Resize pictures by exact pixel dimensions or percentage while preserving aspect ratio right in your browser.

Why choose Herramix?

At Herramix, we build web utilities focused on speed, simplicity, and privacy. Unlike traditional online converters that upload your documents, images, or JSON files to external servers, our tools execute every calculation locally on your device using native browser APIs.

This approach ensures instant responsiveness even on mobile networks, zero waiting for file uploads, and complete peace of mind knowing your sensitive data stays on your device.