Free Online Tools & Utilities
Calculators, converters, random generators, and fun quizzes — all in one place. No sign-up required.
Your Free Online Toolkit
Toolery brings together essential everyday tools in one place — from unit converters and text analyzers to image editors and developer utilities. Every tool runs entirely in your browser, which means your data never leaves your device. No accounts, no uploads, no tracking.
Whether you're a developer debugging JWT tokens, a designer converting color codes, a student calculating BMI, or just someone who needs a quick coin flip — we've got you covered. All tools are free, fast, and built with privacy in mind. We believe the best tools are the ones that respect your time and your data.
Featured Blog Guides
Practical deep dives to help you use tools better, faster, and smarter
From Notes to Shipping: Building an Obsidian + MCP + Claude Code Operating System
A high-leverage operating model for combining Obsidian knowledge design, MCP context bridges, and Claude Code execution into one repeatable development loop.
Password Entropy: Why 'Correct Horse Battery Staple' Beats 'P@ssw0rd'
Understanding password strength through information theory. Learn why longer passphrases are mathematically stronger than complex short passwords.
The Pomodoro Technique Isn't About Tomatoes: A Time Management Deep Dive
Beyond the basic timer: advanced strategies for the Pomodoro Technique that actually boost focus, backed by neuroscience and real-world experience.
PNG vs JPEG vs WebP: Choosing the Right Image Format
Understand the differences between image formats and learn when to use each one for optimal quality and file size.
The Complete Guide to Image Optimization for the Web
Learn how to optimize images for faster page loads, better SEO, and improved user experience with practical tips and free tools.
Homelab Zigbee Coordinator Guide: ZBDongle-P vs ZBDongle-E vs SLZB-06 for Home Assistant + Zigbee2MQTT
A practical comparison of popular Zigbee dongles for Home Assistant homelabs, including architecture choices, model tradeoffs, and a setup checklist.
Why We're Bad at Estimating: The Psychology of Numbers
From lottery odds to project deadlines, our brains consistently fail at numerical reasoning. Explore the cognitive biases that make us terrible with numbers.
Utility Tools
Practical tools for everyday calculations and conversions
Unit Converter
Convert length, weight, and temperature units instantly
Text Counter
Count characters, words, sentences, and paragraphs
QR Code Generator
Create QR codes from URLs or text
Color Converter
Convert between HEX, RGB, and HSL colors
D-Day Calculator
Calculate days until or since any date
BMI Calculator
Calculate your Body Mass Index
JWT Debugger
Decode and inspect JSON Web Tokens
JSON/YAML Converter
Convert and prettify JSON and YAML
Kubeconfig Manager
Manage Kubernetes kubeconfig files easily
Text Share
Compress text and share as a URL with optional encryption
Image Tools
Convert, compress, resize, crop and edit images in your browser
Image Format Converter
Convert between PNG, JPEG, and WebP
Image Compressor
Reduce image file size with quality control
Image Resizer
Resize images to exact dimensions
Image Cropper
Crop images with precision selection
Image Editor
Adjust brightness, contrast, and filters
Image Merge & Resize
Merge, resize, or crop images in your browser
Fun & Random
Random generators and decision makers for fun
Spin the Wheel
Random selection wheel with custom options
Ladder Game
Korean-style random selection game
Rock Paper Scissors
Classic game against the computer
Team Generator
Divide people into random teams
Lotto Generator
Generate random lottery numbers
Slot Machine
Spin the emoji slots for fun
Card Draw
Draw random cards from a deck
Drawing Lots
Pick a lot to test your luck
Random Number
Generate random numbers in any range
Coin Flip
Flip a virtual coin - Heads or Tails
Dice Roller
Roll virtual dice with animations
Yes or No
Let fate decide for you
Personality Quizzes
Discover more about yourself with fun quizzes