100% Browser-Based
Tools run with JavaScript in your browser—open a page, use it, and close the tab without installing software.
Popular free online tools
High-intent utilities people open most often
P
Percentage Calculator
What is 20% of 500? Percent increase, decrease, markup, and margin — instant answers.
J
JSON Formatter
Format, validate, and minify JSON in the browser—one of the fastest paths when an API response is unreadable.
W
Word Counter
Words, characters, and reading-time style stats for essays, ads, and social drafts.
B
BMI Calculator
Screen body mass index from height and weight—metric or imperial, runs locally in your browser.
R
Regex Tester
Test patterns, capture groups, and replace preview—JavaScript RegExp with match highlighting.
P
Password Generator
Strong random passwords with length and character rules you control.
A
Age Calculator
Exact age in years, months, and days—useful for forms, milestones, and eligibility checks.
T
Tip Calculator
Calculate tip amount, split bills, and total per person—runs locally in your browser.
H
Hash Generator
Compute MD5, SHA-256, and other digests from text locally for checksums and debugging.
U
Unix Timestamp Converter — Epoch to Human Date
Convert Unix epoch seconds and milliseconds to readable dates—and back again.
Browse by category
6 categories — 222 tools in the catalog
Calculators
Health, finance, math, and everyday formulas
115 tools
Developer Tools
JSON, regex, JWT, URLs, and API helpers
52 tools
Text Tools
Word counts, passwords, case, and text cleanup
12 tools
Date & Time
Age, hours, timestamps, and scheduling
18 tools
Design & UI
CSS generators, colors, and layout helpers
21 tools
3D Tools
View GLTF, STL models and 360° panoramas
4 tools
Featured tools
Powerful utilities for developers and everyday work
J
JSON Formatter
Format, validate, and minify JSON in the browser—one of the fastest paths when an API response is unreadable.
Open toolW
Word Counter
Words, characters, and reading-time style stats for essays, ads, and social drafts.
P
Percentage Calculator
What is 20% of 500? Percent increase, decrease, markup, and margin — instant answers.
B
BMI Calculator
Screen body mass index from height and weight—metric or imperial, runs locally in your browser.
H
Hash Generator
Compute MD5, SHA-256, and other digests from text locally for checksums and debugging.