All Calculators (323)

Browse all 323 developer tools organized by category.

Encoders & Formats

JSON Tools (20)

Format and beautify JSON data with proper indentation

Validate JSON data and detect errors

View JSON data in a tree structure

Minify JSON by removing whitespace

Convert JSON arrays to CSV format

Convert CSV data to JSON format

Convert JSON to YAML format

Convert YAML to JSON format

JSON to TypeScript

Generate TypeScript interfaces from JSON

Compare two JSON objects and find differences

Convert JSON data to XML format

JSONPath Tester

Test JSONPath expressions against JSON data

JSON Schema Generator

Generate JSON Schema from JSON data

JSON Escape/Unescape

Escape and unescape JSON strings

Flatten and unflatten JSON objects

JSON Path Extractor

Extract data using JSONPath expressions

JSON Merge Tool

Merge multiple JSON objects

Convert JSON data to SQL statements

JSON to HTML Table

Convert JSON arrays to HTML tables

JSON Diff Online

Compare two JSON objects online

Base64 Tools (6)

Encode text to Base64

Decode Base64 to text

Image to Base64

Convert images to Base64 data URIs

Base64 to Image

Convert Base64 data to images

Base64 File Converter

Convert files to and from Base64

URL-safe Base64

URL-safe Base64 encoding and decoding

Encode text for safe URL usage

Decode URL-encoded text

Parse and analyze URL components

Validate URL format

Decode and inspect JWT tokens

Create JWT tokens

Validate JWT token structure

Format and beautify XML data

Validate XML syntax and detect errors

Convert XML data to JSON format

Convert JSON to XML format

Convert XML data to CSV format

Convert XML data to YAML format

XML Escape/Unescape

Escape and unescape XML characters

XML to Markdown

Convert XML to Markdown format

Format and beautify YAML data

Validate YAML syntax and detect errors

Convert YAML to JSON format

Convert YAML data to CSV format

Convert YAML to TOML format

Convert YAML to XML format

Convert YAML data to SQL statements

Compare two YAML documents

Convert CSV data to JSON format

View CSV data as a formatted table

Format and align CSV columns

Convert CSV to SQL INSERT statements

CSV to HTML Table

Convert CSV data to HTML tables

CSV to Markdown Table

Convert CSV to Markdown tables

CSV Data Cleaner

Clean and fix messy CSV data

Encoding Tools (8)

HTML Entity Encoder

Encode and decode HTML entities

Apply ROT13 cipher to text

Morse Code Translator

Convert text to Morse code and back

Hex to Text Converter

Convert between hexadecimal and text

Punycode Converter

Convert internationalized domain names

ASCII85 Encoder

Encode and decode ASCII85/Base85

Apply ROT47 cipher to text

HTML Entity Decoder

Decode HTML entities to text

Text & Content

Text Tools (25)

Lorem Ipsum Generator

Generate placeholder text for designs and mockups

Text Statistics

Count words, characters, sentences, and reading time

Count words, characters, and sentences

Remove Duplicate Lines

Remove duplicate lines from text

Extract email addresses from text

Extract URLs from text content

Add Prefix & Suffix

Add prefix and suffix to each line

Remove Whitespace

Remove extra whitespace from text

Text to Columns

Split text into columns by delimiter

Join lines with custom separator

Remove Line Breaks

Remove line breaks from text

Extract Numbers

Extract numbers from text content

Sort words alphabetically

Reverse Word Order

Reverse the order of words in text

Convert text to ASCII character codes

Acronym Generator

Generate acronyms from text

Upside Down Text

Flip text upside down

Strikethrough Generator

Apply strikethrough to text

Small Caps Text

Convert text to small caps

Convert text to hexadecimal

Shuffle words randomly

Create zigzag text pattern

Lorem Ipsum Generator

Generate placeholder text

Browse and copy emojis

Compare two texts and find differences

Text Manipulation (8)

Text Case Converter

Convert text between camelCase, PascalCase, snake_case and more

Generate URL-friendly slugs from text

String Reverser

Reverse text, words, or characters

Find and replace text with regex support

Repeat text with custom separators and counts

List Sorter & Deduplicator

Sort, deduplicate, and clean up lists

Word Frequency Counter

Count word and character frequency in text

Text Diff Checker

Compare two texts and highlight differences

Text Utilities (8)

Text Column Extractor

Extract specific columns from delimited text

Line Number Adder

Add line numbers to text in various formats

Convert text to speech using browser TTS

String Length Calculator

Calculate string length in various encodings

Truncate text with customizable ellipsis

Text to Handwriting

Convert text to handwriting style

Search Unicode characters

Encode text with different charsets

Markdown Tools (5)

Markdown Editor

Write Markdown with live HTML preview

Markdown to HTML

Convert Markdown to HTML

HTML to Markdown

Convert HTML to Markdown format

Markdown Table Generator

Create Markdown tables visually

Markdown to HTML Table

Convert Markdown tables to HTML

Format and beautify HTML code with proper indentation

Minify HTML by removing whitespace and comments

Preview HTML code in a sandboxed iframe

HTML to Markdown

Convert HTML to Markdown format

HTML Entity Encoder/Decoder

Encode and decode HTML entities

HTML Comment Stripper

Remove HTML comments from code

Developer

Format and beautify SQL queries

Minify SQL by removing whitespace

Validate SQL syntax

SQL to TypeScript

Convert SQL schema to TypeScript interfaces

SQL INSERT Generator

Generate INSERT statements from data

Regex Tools (3)

Test regular expressions against text

Regex Generator

Generate regex patterns from descriptions

Regex Validator

Validate regex syntax

Generate random UUID v4

Validate UUID format

Hash & Crypto Tools (10)

MD5 Hash Generator

Calculate MD5 hash of text

SHA-256 Hash Generator

Calculate SHA-256 hash using Web Crypto API

SHA-512 Hash Generator

Calculate SHA-512 hash using Web Crypto API

Generate SHA-1/256/384/512 hashes and HMAC

SHA-1 Hash Generator

Calculate SHA-1 hash using Web Crypto API

SHA-384 Hash Generator

Calculate SHA-384 hash using Web Crypto API

Bcrypt Hash Generator

Generate bcrypt hashes from text

Hash Type Identifier

Identify hash types by length and format

RIPEMD Hash Generator

Calculate RIPEMD-160 hash online

CRC32 Generator

Calculate CRC32 checksum of text

Compare two texts and highlight differences line by line

JSONPath Tester

Test JSONPath expressions against JSON data

Test regex patterns with real-time matching

SQL to TypeScript

Convert SQL schema to TypeScript interfaces

Markdown Table Generator

Create Markdown tables visually

API Request Builder

Build and test API requests with cURL export

cURL to Code Converter

Convert cURL commands to JavaScript, Python, PHP, Go, Ruby, Java

HTTP Status Codes Reference

Browse and search HTTP status codes

Decode and inspect JWT tokens

CORS Header Generator

Generate CORS headers for Nginx/Apache/Express

DevOps Tools (16)

Dockerfile Generator

Generate Dockerfile configurations for your projects

.gitignore Generator

Generate .gitignore files for your projects

Cron Expression Parser

Parse and explain cron expressions with next runs

Chmod Calculator

Calculate Unix file permissions numerically and symbolically

Docker Compose Generator

Generate docker-compose.yml files visually

.htaccess Generator

Generate Apache .htaccess files

SQL INSERT Generator

Generate INSERT statements from data

JSON Schema Generator

Generate JSON Schema from JSON data

Fake Data Generator

Generate fake data for testing

README.md Generator

Generate README files for projects

Git Commit Message Generator

Generate conventional commit messages

Changelog Generator

Generate changelogs from commit history

Choose the right open source license

JSON Escape/Unescape

Escape and unescape JSON strings

XML Escape/Unescape

Escape and unescape XML characters

CSV Data Cleaner

Clean and fix messy CSV data

Reference Tools (2)

MIME Type Lookup

Look up MIME types by file extension or vice versa

Unicode Character Lookup

Find Unicode characters, code points, and properties

Web & SEO

Format and beautify CSS code

Minify CSS by removing whitespace and comments

CSS Gradient Generator

Generate CSS gradients visually

CSS Unit Converter

Convert between px, rem, em, vw, vh units

CSS Box Shadow Generator

Generate box-shadow CSS visually

Border Radius Previewer

Preview border-radius visually

CSS Button Generator

Generate CSS button styles

CSS Animation Generator

Generate CSS keyframe animations

Font Pairing Tool

Find matching font combinations

Mix colors together visually

CSS Filter Generator

Generate CSS filter effects

Tailwind Color Palette

Browse Tailwind CSS color palette

Spacing Calculator

Calculate spacing values

CSS Grid Generator

Generate CSS Grid layouts visually

CSS Selector Tester

Test CSS selectors against HTML

CSS Color Keywords

Reference CSS color keywords

JavaScript Tools (4)

JavaScript Formatter

Format and beautify JavaScript code

JavaScript Minifier

Minify JavaScript code

JavaScript Obfuscator

Obfuscate JS by renaming variables

Test regex patterns with real-time matching

Meta Tag Generator

Generate SEO meta tags with Open Graph and Twitter Cards

Robots.txt Generator

Generate robots.txt files for your website

XML Sitemap Generator

Generate XML sitemaps for SEO

Open Graph Generator

Generate Open Graph meta tags for social sharing

URL Encoder/Decoder

Encode or decode URL strings

Schema.org Generator

Generate Schema.org JSON-LD markup

Keyword Density Checker

Check keyword density in text

Social Media Preview

Preview social media sharing cards

Canonical Tag Generator

Generate canonical URL tags

Hreflang Generator

Generate hreflang tags for SEO

Favicon Generator

Generate favicons for websites

Structured Data Tester

Test structured data markup

SEO Slug Checker

Check URL slugs for SEO

Robots.txt Validator

Validate robots.txt files

Sitemap Validator

Validate XML sitemaps

UTM URL Builder

Build URLs with UTM parameters

Accessibility Tools (4)

Color Blindness Simulator

Preview colors for color vision deficiencies

Alt Text Generator

Generate descriptive alt text for images

Contrast Ratio Checker

Check WCAG contrast ratios between colors

Color Blindness Test

Test color vision ability

Config Generators (4)

Nginx Config Generator

Generate Nginx server configurations

Environment File Generator

Generate .env files with presets

package.json Generator

Generate package.json for Node.js projects

tsconfig.json Generator

Generate TypeScript configuration files

Converters

Converter Tools (16)

Number Base Converter

Convert between binary, octal, decimal, and hexadecimal

Text to Binary Converter

Convert text to binary and binary to text with UTF-8

Roman Numeral Converter

Convert between Roman and decimal numbers

Color Format Converter

Convert between HEX, RGB, HSL, CMYK

Angle Converter

Convert between degrees, radians, gradians

Energy Converter

Convert between joules, calories, kWh, BTU

Convert TSV to JSON format

Convert JSON to TSV format

Convert JSON to TOML format

Convert TOML to JSON format

Convert JSON to INI format

Convert INI to JSON format

Convert TOML to YAML format

Properties to JSON

Convert Java properties to JSON

JSON to Properties

Convert JSON to Java properties

JSON to Protobuf

Convert JSON to Protobuf schema

Unit Converters (3)

Convert between length, weight, temperature, speed, data, and time units

Number Base Converter

Convert between binary, octal, decimal, and hexadecimal

Text to Binary Converter

Convert text to binary and binary to text

Unit Converters Plus (6)

Data Storage Converter

Convert data storage units

Pressure Converter

Convert pressure units

Speed Converter

Convert speed units

Volume Converter

Convert volume units

Convert area units

Fuel Economy Converter

Convert fuel economy units

Math & Calculators

Math Tools (28)

Percentage Calculator

Calculate percentages, increases, and decreases

Random Number Generator

Generate random numbers within a range

Calculate tips and split bills

Aspect Ratio Calculator

Calculate dimensions from aspect ratios

Statistics Calculator

Calculate mean, median, mode, std dev

GCD & LCM Calculator

Calculate greatest common divisor and LCM

Prime Number Checker

Check primality and find prime factorization

Scientific Notation Converter

Convert to/from scientific notation

Sequence Calculator

Fibonacci, Lucas, and custom sequences

Binary Calculator

Perform binary arithmetic

Number to Words

Convert numbers to words

Hexadecimal calculator

Standard Deviation

Calculate standard deviation

Z-Score Calculator

Calculate z-scores

Percentile Calculator

Calculate percentiles

Mean Median Mode

Calculate mean, median, and mode

Variance Calculator

Calculate variance

Combination Calculator

Calculate combinations and permutations

Fraction Calculator

Perform fraction arithmetic

Big Number Calculator

Calculate with large numbers

Matrix Calculator

Perform matrix operations

Logarithm Calculator

Calculate logarithms

Exponential Calculator

Calculate exponential functions

Modulo Calculator

Calculate modulo remainder

Pythagorean Calculator

Calculate triangle sides

Quadratic Solver

Solve quadratic equations

Percentage Change

Calculate percentage change

Ratio Calculator

Calculate ratios and proportions

Finance Tools (11)

Currency Converter

Convert between currencies

Loan Calculator

Calculate loan payments

Compound Interest

Calculate compound interest

Calculate return on investment

Salary Converter

Convert between salary periods

Calculate simple tax

Discount Calculator

Calculate discounts

Calculate profit margin

Markup Calculator

Calculate markup percentage

Unit Price Comparator

Compare unit prices

Savings Calculator

Calculate savings growth

Health Tools (9)

Calculate body mass index

Calorie Calculator

Calculate daily calorie needs

Macro Calculator

Calculate macronutrient ratios

Body Fat Calculator

Estimate body fat percentage

Heart Rate Zone

Calculate heart rate zones

Calculate running pace

Pregnancy Calculator

Calculate due date

Calculate daily water intake

Sleep Calculator

Calculate sleep cycles

Date & Time Tools (16)

Date Calculator

Calculate date differences and add/subtract days

Timezone Converter

Convert times between different timezones

Calculate exact age with zodiac and birthday countdown

Timestamp to Date

Convert Unix timestamps to dates

World Clock Converter

Convert times between 19 time zones

Timestamp Difference

Calculate time between timestamps

Pomodoro technique timer

Countdown Timer

Online countdown timer

Online stopwatch with lap times

Date Format Converter

Convert between date formats

Timezone Offset

Calculate timezone offsets

Timezone Meeting Planner

Plan meetings across timezones

Business Days Calculator

Calculate business days between dates

Leap Year Checker

Check if a year is a leap year

Day of Week Calculator

Find day of week for a date

Week Number Calculator

Find week number of a date

Design & Media

Color Tools (5)

Color Converter

Convert between HEX, RGB, and HSL

Palette Generator

Generate color palettes from a base color

Pick colors visually with preset swatches

Color Format Converter

Convert between HEX, RGB, HSL, CMYK formats

Color Palette Generator

Generate beautiful color palettes

Image Tools (7)

Resize images with custom dimensions and formats

Image to Base64 Converter

Convert images to Base64 data URIs

SVG to PNG Converter

Convert SVG files to PNG images

Color Palette Generator

Generate beautiful color palettes

Placeholder Image Generator

Generate placeholder image URLs

Barcode Generator

Generate barcodes from text

WiFi QR Generator

Generate WiFi QR codes

Security & Network

Security Tools (6)

Password Generator

Generate strong, secure passwords with strength analysis

Random Password Generator

Generate passwords with Web Crypto API

Generate SHA-1/256/384/512 hashes and HMAC

SSL Certificate Decoder

Check and decode SSL certificates

API Key Generator

Generate random API keys

Token Generator

Generate random secure tokens

IP & Network Tools (4)

Find your public IP address and location

Subnet Calculator

Calculate IPv4 subnet ranges and details

Convert IPv4 between formats

IP Subnet Calculator

Calculate IP subnet ranges

Network Tools (3)

User Agent Parser

Parse browser user agent strings

Bandwidth Calculator

Calculate download times and transfer rates

Look up DNS records for domains

Data Validation (5)

JSON Schema Validator

Validate JSON data against a JSON Schema

Email Validator

Validate email format and detect disposable emails

Phone Number Validator

Validate and format international phone numbers

Password Strength Checker

Check password strength with entropy analysis

Credit Card Validator

Validate credit card numbers with Luhn algorithm