About Pratron
Pratron is a collection of 54+ free online tools: unit converters, calculators, generators, and utilities for text, development, images, and design. The tools are free and require no sign-up.
How a tool earns its place
We build practical tools for everyday tasks, guided by four principles:
- Solves recurring friction
- The task comes back often enough to deserve a dependable shortcut.
- Has one clear outcome
- The purpose is obvious before the first click, and the result is easy to use.
- Works without an account
- No identity, profile, or onboarding flow is required to finish the task.
- Uses the network only when needed
- Optional network requests are limited and disclosed before use.
Categories
- Converters — Convert units, number bases, timestamps, and formats: length, weight, temperature, data size, and more.
- Calculators — Everyday calculators for percentages, loans, compound interest, BMI, tips, dates, and age.
- Generators — Generate QR codes, secure passwords, UUIDs, hashes, barcodes, placeholder text, and random numbers.
- Text Tools — Count, clean, sort, compare, and transform text: word counter, case converter, diff checker, and more.
- Developer Tools — Encode, decode, format, and inspect: Base64, URL, JSON, YAML, CSV, JWT, regex, cron, and subnets.
- Design Tools — Visual helpers for the web: color converter with contrast check, CSS gradient and box-shadow generators.
- Image Tools — Compress, resize, and clean images right in your browser: image compressor, EXIF remover, and favicon generator. Files never leave your device.
Contact
Questions or suggestions for new tools?