All Free Online Tools

JSON Formatter

Format and validate JSON

Mortgage Calculator

Calculate loan payments

Whois Lookup

Domain registration info

Base64 Encoder/Decoder

Encode and decode Base64

Currency Converter

Live currency rates

Graphing Calculator

Interactive math graphing

Wheel of Names

Random name picker wheel

SLA Calculator

Calculate SLA downtime

Cron Parser

Parse cron expressions

Text Diff Checker

Compare text differences

Chmod Calculator

Unix file permissions

Markdown Preview

Live Markdown renderer

Regex Tester

Test regex patterns

Hash Generator

Generate hash digests

URL Encoder/Decoder

Encode/decode URLs

UUID Generator

Generate UUIDs

Color Converter

Convert color formats

Subnet Calculator

IPv4 & IPv6 subnet math

JWT Decoder

Decode JWT tokens

Timestamp Converter

Unix timestamp converter

CSV to JSON Converter

Convert CSV and JSON

Image Converter

Convert PNG, JPEG, WebP

Favicon Generator

Create favicons & app icons

Notepad Calculator

Notepad-style math solver

Percentage Calculator

Every percentage calc

Age Calculator

Exact age from birthdate

Date Calculator

Date math & business days

BMI Calculator

Body Mass Index & category

Random Number Generator

Random numbers in range

Countdown Timer

Countdown to any date

Time Zone Converter

Convert across time zones

Loan Calculator

Payments & amortization

Compound Interest Calculator

Compound growth projections

Number Base Converter

Binary, hex & any base

UTM Link Builder

Campaign tracking URLs

Word Frequency Counter

Word & phrase density

Email Signature Generator

HTML email signatures

Gzip Compress/Decompress

Gzip text compression

Escape/Unescape

Escape HTML, JS & regex

YAML Formatter

Format and validate YAML

SQL Formatter

Format SQL by dialect

HTML Beautifier

Beautify HTML, CSS & JS

JSON ↔ XML Converter

Convert JSON and XML

JSON Schema Validator

Validate JSON schemas

Meta Tag Generator

SEO & social meta tags

Robots.txt Generator

Control crawler access

SEO Slug Generator

Clean URL slugs

Meta Tag Analyzer

Audit page metadata

Link Auditor

Extract & audit links

Tip Calculator

Tip & bill splitter

Sales Tax Calculator

Add or extract sales tax

BAC Calculator

Estimate blood alcohol content

Calorie Calculator

Daily calories, BMR & TDEE

Fraction Calculator

Exact fraction math

Grade Calculator

Course grade & final target

GPA Calculator

4.0 scale GPA

Statistics Calculator

Mean, median, std dev

Hours Calculator

Timesheet hours with breaks

Working Days Calculator

Business days minus holidays

Fancy Text Generator

Stylish Unicode text fonts

Text Reverser

Reverse text three ways

Line Sorter

Sort or shuffle lines

Duplicate Line Remover

Remove duplicate lines

Remove Line Breaks

Strip newlines from text

Find and Replace

Search & replace with regex

Text Repeater

Repeat text multiple times

Morse Code Translator

Translate Morse code

Roman Numeral Converter

Convert Roman numerals

Number to Words Converter

Spell out numbers

ROT13 & Caesar Cipher

ROT13 & Caesar shifts

Binary to Text Converter

Binary & hex converter

Words to Pages Calculator

Words to pages estimate

Flip a Coin

Flip a fair virtual coin

Dice Roller

Roll dice like 2d6+3

Yes or No

Instant random yes or no

Magic 8-Ball

Classic magic 8-ball answers

Scientific Calculator

Advanced math calculator

Discount Calculator

Sale price and percent off

Lorem Ipsum Generator

Placeholder text generator

VAT Calculator

Add or remove VAT/GST

GCF and LCM Calculator

GCF and LCM with steps

Military Time Converter

24-hour clock conversion

Online Stopwatch

Stopwatch with laps

Quadratic Formula Calculator

Solve ax² + bx + c = 0

Significant Figures Calculator

Count and round sig figs

Aspect Ratio Calculator

Scale dimensions in proportion

Speed Reader

RSVP flashing-word reader

JSON to Types Converter

JSON to TS, Go, Elixir types

TOML Converter

TOML, YAML, JSON conversion

.env to JSON Converter

Convert .env files to JSON

HTTP Status Code Lookup

Search HTTP status codes

MIME Type Lookup

Find MIME types

User-Agent Parser

Parse user agent strings

CSS Unit Converter

Convert CSS units

CSS Easing Generator

Build easing curves

CSP Header Builder

Build CSP headers

ASCII Art Generator

Make ASCII art banners

Circle Calculator

Solve circle properties

Volume Calculator

Calculate shape volumes

Matrix Calculator

Matrix math operations

Combination and Permutation Calculator

nCr, nPr, factorials

Prime Factorization

Factor numbers into primes

Slope Calculator

Slope from two points

Distance Calculator

Distance between points

Ratio Calculator

Solve A:B = C:D

Rounding Calculator

Round numbers

Complex Number Calculator

Calculate with complex numbers

Shared Scratchpad

Real-time shared notepad

Typing Speed Test

Test your typing speed

Triangle Calculator

Solve any triangle

Table Generator

Visual table builder

Color Contrast Checker

Check WCAG contrast

Fake Data Generator

Generate test data

Image Cropper

Crop images in-browser

Image Color Picker

Pick colors from images

Shoe Size Converter

Convert shoe sizes

Dog Age Calculator

Dog years to human years

Anonymous Q&A Board

Live anonymous Q&A

Reaction Time Test

Test your reaction speed

Screen Resolution Detector

Detect screen & viewport size