Fast, free tools.
No sign-up. No nonsense.
Calculators, converters, developer tools, text utilities & more — all running in your browser. Nothing leaves your device.
Most Popular6
QR Code Generator
Create QR codes for URLs, text, WiFi & more
→Password Generator
Generate strong, random passwords instantly
→Image Compressor
Compress images in your browser — no upload
→Word Counter
Count words, characters, sentences & paragraphs
→Percentage Calculator
What is X% of Y? All percentage calculations
→Unit Converter
Length, weight, temperature, volume & more
→Finance Tools4
Developer Tools6
JSON Formatter & Validator
Beautify, validate & minify JSON data
→Base64 Encoder & Decoder
Encode/decode Base64 with UTF-8 support
→Hash Generator
SHA-256, SHA-512 & SHA-1 hash generation
→Timestamp Converter
Unix timestamps to dates and back
→Text to Binary
Convert text to binary, hex, octal & decimal
→Screen Resolution Checker
Your screen size, DPR & display info
→Text Tools5
Statistics Tools3
Calculators & Math3
Date, Time & Productivity4
Why AstroToolsz?
100% Private
Everything runs in your browser. Your data never leaves your device.
Instant Results
No loading screens. Results appear the moment you click.
Always Free
No sign-up, no paywalls, no limits. Free forever.
Works Everywhere
Desktop, tablet, and mobile — fully responsive.
Your All-in-One Free Online Toolbox
AstroToolsz is a growing collection of free online tools for students, developers, designers, and professionals. From financial calculators like our mortgage and loan EMI calculator, to developer tools like the JSON formatter and Base64 encoder, to statistical tools like ANOVA and linear regression calculators — every tool runs entirely in your browser for maximum speed and privacy. We add new tools every week. Bookmark us and check back often.