Simple Tools for Everyday Tasks
Fast, free and easy-to-use online tools for everyday work, development, images and more.
Popular Tools
The tools people reach for most.
Calculator
A fast, safe on-screen calculator for everyday arithmetic.
Age Calculator
Work out an exact age in years, months and days from any birth date.
Percentage Calculator
Calculate percentages, increases, decreases and differences instantly.
Word & Character Counter
Count words, characters, sentences and estimate reading time.
Text Case Converter
Convert text to UPPERCASE, lowercase, Title Case, camelCase and more.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to readable text.
URL Encoder / Decoder
Encode or decode URLs and URI components safely.
Image Compressor
Shrink JPG, PNG and WebP images without uploading them anywhere.
Image Resizer
Resize images to exact dimensions or by percentage.
QR Code Generator
Create QR codes for URLs, text, email, phone numbers and Wi-Fi.
Password Generator
Generate strong, random passwords using secure browser randomness.
Browse by Category
Calculators
Everyday math, dates, percentages and unit conversions.
5 toolsText Tools
Count, clean and reshape text in your browser.
3 toolsEncoding & Decoding
Base64, URL, HTML, JWT and hashing utilities.
5 toolsImage Tools
Compress, resize, convert and crop images locally.
4 toolsUtilities
QR codes, passwords and color conversion.
3 toolsFeatured Tools
Calculator
A fast, safe on-screen calculator for everyday arithmetic.
Unit Converter
Convert length, weight, temperature, area, volume, speed and more.
Word & Character Counter
Count words, characters, sentences and estimate reading time.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to readable text.
JWT Decoder
Inspect a JSON Web Token's header and payload in your browser.
Image Compressor
Shrink JPG, PNG and WebP images without uploading them anywhere.
QR Code Generator
Create QR codes for URLs, text, email, phone numbers and Wi-Fi.
Extremely fast
Tools load instantly and process everything without round trips to a server.
Privacy-first
Most tools run fully in your browser — your files and text stay on your device.
Works everywhere
A responsive, mobile-first design that feels great on any screen size.
Frequently Asked Questions
Yes. Every tool on Zentry Tools is free, with no account, sign-up, or subscription required.
No installation is needed. Zentry Tools runs entirely in your web browser on desktop and mobile.
Most tools, including all image, text and password tools, process everything locally in your browser. Nothing is uploaded unless a tool specifically states otherwise.
Yes. Every tool is designed mobile-first and works smoothly on phones, tablets and desktops.