OhMyApps

Tools

Free online utilities for developers, designers, and everyday use

Developer Tools

50

Free browser-based developer tools for JSON, JWT, regex, Base64, SQL, cURL, UUIDs, hashes, timestamps, and API debugging.

Text Tools

36

Free online text tools for word counting, case conversion, text diffing, slug generation, cleanup, sorting, reversing, and writing utilities.

SEO Tools

22

Free SEO tools for meta tags, robots.txt, XML sitemaps, SERP previews, canonical URLs, schema markup, hreflang, and crawl diagnostics.

Math & Number Tools

26

Free calculators and number tools for percentages, averages, statistics, ratios, fractions, number bases, matrices, exponents, and conversions.

Design & Color Tools

27

Free design tools for color palettes, contrast checking, gradients, CSS shadows, border radius, typography scales, and layout snippets.

Productivity Tools

35

Free productivity tools for timers, planners, checklists, QR codes, note taking, date math, time zones, habit tracking, and quick decisions.

Finance Tools

27

Free finance calculators for compound interest, loans, mortgages, rent versus buy, debt payoff, retirement, net worth, and NZ PAYE take-home pay.

Developer Tools

Built for developers who need fast utilities without opening an IDE plugin, account dashboard, or command-line helper.

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Developer

Backslash Escape/Unescape

Escape or unescape backslash sequences in text

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Developer

Base64 Encode/Decode

Encode text to Base64 or decode Base64 strings

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Developer

Basic Auth Generator

Generate HTTP Basic Authorization headers

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Developer

JSON Format/Validate

Format, validate, and beautify JSON with syntax highlighting

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Developer

Unix Time Converter

Convert timestamps to human-readable dates and vice versa

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Developer

CSV to JSON

Convert CSV data to JSON array format

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Developer

Regex Tester

Test and debug regular expressions with live matching

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Developer

URL Encode/Decode

Encode or decode URL components and query strings

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Developer

URL Parser

Break URLs into protocol, host, path, query, and hash parts

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Developer

JWT Decoder

Decode and inspect JSON Web Tokens

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Developer

2FA Code Generator

Generate TOTP verification codes from a 2FA secret

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Developer

JSON to YAML

Convert JSON data to YAML format

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Developer

YAML to JSON

Convert YAML data to JSON format

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Developer

HTML Entity Encode/Decode

Encode or decode HTML entities and special characters

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Developer

JSON to CSV

Convert JSON arrays to CSV format

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Developer

JSON Diff

Compare two JSON documents and highlight differences

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Developer

JSON Minify

Minify JSON by removing whitespace and formatting

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Developer

JSON Path Tester

Test JSONPath expressions against JSON data

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Developer

Cron Expression Parser

Parse and explain cron schedule expressions

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Developer

UUID Generator

Generate random UUIDs (v4) instantly

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Developer

ULID Generator

Generate sortable unique identifiers

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Developer

Hash Generator

Generate SHA-256, SHA-512, and other hash digests

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Developer

HMAC Generator

Create keyed message authentication codes

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Developer

HTTP Status Code Reference

Browse and search all HTTP status codes

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Developer

MIME Type Lookup

Find MIME types by extension or extension by MIME type

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Developer

SQL Formatter

Format and beautify SQL queries

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Developer

User-Agent Parser

Parse browser, OS, device, and rendering engine from a user agent

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Developer

Keycode Info

Inspect JavaScript keyboard event values

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Developer

Random Port Generator

Generate random available-looking development ports

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Developer

IPv4 Subnet Calculator

Calculate network, broadcast, host range, and masks

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Developer

IPv4 Address Converter

Convert IPv4 addresses between dotted, decimal, hex, and binary

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Developer

JSON to TypeScript Interface

Generate TypeScript interfaces from JSON data

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Developer

Markdown to HTML Converter

Convert Markdown syntax to clean HTML

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Developer

HTML to Markdown Converter

Convert HTML code to Markdown syntax

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Developer

XML Formatter & Validator

Format, beautify, and validate XML documents

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Developer

CSS Minifier

Minify CSS by removing whitespace and comments

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Developer

JavaScript Minifier

Minify JavaScript by removing whitespace and comments

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Developer

HTML Minifier

Minify HTML by removing whitespace and comments

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Developer

.gitignore Generator

Generate .gitignore files for any project type

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Developer

Unix Permission Calculator

Calculate Unix file permissions in numeric and symbolic notation

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Developer

TOML to JSON Converter

Convert TOML configuration to JSON format

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Developer

JSON to TOML Converter

Convert JSON configuration to TOML

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Developer

TOML to YAML Converter

Convert TOML configuration to YAML

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Developer

YAML to TOML Converter

Convert YAML configuration to TOML

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Developer

JSON to XML Converter

Convert JSON data to XML format

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Developer

XML to JSON Converter

Convert XML documents to JSON

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Developer

HTML Table to CSV

Extract HTML table data into CSV format

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Developer

cURL to Fetch Converter

Convert cURL commands to JavaScript fetch code

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Developer

Base32 Encode/Decode

Encode text to Base32 or decode Base32 strings

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Developer

JSON Schema Generator

Generate JSON Schema from sample JSON data

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Text Tools

Built for people who need a focused text utility rather than a full editor or document app.

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Text

Word Counter

Count words, characters, sentences, and paragraphs

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Text

Case Converter

Convert text between camelCase, snake_case, and more

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Text

Lorem Ipsum Generator

Generate placeholder text for designs and layouts

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Text

Text Diff

Compare two texts and highlight differences

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Text

String Reverse

Reverse any text string instantly

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Text

String Obfuscator

Mask secrets while keeping them identifiable

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Text

Numeronym Generator

Turn words into i18n-style abbreviations

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Text

Text to Slug

Convert text to URL-friendly slugs

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Text

Markdown Preview

Write Markdown and see a live preview

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Text

Find and Replace

Find and replace text with optional regex support

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Text

Line Sorter

Sort lines of text alphabetically or numerically

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Text

Duplicate Line Remover

Remove duplicate lines from text

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Text

Text Truncate

Truncate text to a specific length with ellipsis

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Text

Text to Binary

Convert text to binary and binary to text

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Text

Whitespace Remover

Clean up extra whitespace from text

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Text

NATO Phonetic Alphabet

Convert text to NATO phonetic alphabet

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Text

Random String Generator

Generate random strings with custom options

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Text

Character Map

Browse and copy Unicode characters and symbols

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Text

Emoji Picker

Browse and copy emojis by category

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Text

ASCII Art Generator

Convert text to ASCII art with different fonts

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Text

Morse Code Translator

Convert text to Morse code and back

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Text

Text to Hex Converter

Convert text to hexadecimal and hex to text

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Text

Reading Time Calculator

Estimate how long it takes to read your text

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Text

Text Statistics Analyzer

Analyze text for words, sentences, paragraphs, and readability

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Text

Invisible Character Detector

Find and remove invisible and zero-width characters

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Text

Palindrome Checker

Check if a word or phrase is a palindrome

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Text

Pig Latin Translator

Translate English text to Pig Latin and back

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Text

Text Repeater

Repeat text multiple times with custom separators

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Text

List Shuffler & Randomizer

Randomly shuffle and reorder a list of items

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Text

Number to Words Converter

Convert numbers to their English word representation

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Text

Text Encryptor

Encrypt and decrypt text with Caesar cipher and ROT13

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Text

Fancy Text Generator

Transform text into fancy Unicode font styles

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Text

Column Extractor

Extract specific columns from tabular text data

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Text

HTML Tag Stripper

Remove all HTML tags from text

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Text

Text to ASCII Codes

View ASCII and Unicode code points for each character

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Text

Zalgo Text Generator

Create glitchy Zalgo text with combining characters

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SEO Tools

Built for technical SEO cleanup, launch checks, and quick search-result snippet improvements.

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SEO

Meta Tag Generator

Generate HTML meta tags for SEO

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SEO

Open Graph Generator

Generate Open Graph meta tags for social sharing

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SEO

Robots.txt Generator

Generate robots.txt files for search engines

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SEO

Sitemap XML Generator

Generate XML sitemaps for search engines

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SEO

Keyword Density Analyzer

Analyze keyword frequency and density in text

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SEO

SERP Preview

Preview how your page appears in Google search results

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SEO

Canonical URL Builder

Generate canonical URL tags to prevent duplicate content

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SEO

Schema.org Generator

Generate JSON-LD structured data for rich results

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SEO

Redirect Chain Checker

Check URL redirects and redirect chains

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SEO

Page Speed Checklist

Interactive checklist for optimizing page speed

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SEO

Heading Structure Analyzer

Analyze HTML heading hierarchy for SEO

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SEO

Twitter Card Generator

Generate Twitter Card meta tags for X/Twitter sharing

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SEO

Hreflang Tag Generator

Generate hreflang tags for multilingual websites

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SEO

FAQ Schema Generator

Generate FAQ structured data for rich search results

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SEO

Breadcrumb Schema Generator

Generate breadcrumb structured data for navigation

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SEO

SEO Title & Meta Checker

Check SEO title and meta description length and quality

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SEO

OG Image Preview Tester

Preview how your Open Graph image appears on social platforms

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SEO

UTM Link Builder

Build UTM-tagged URLs for campaign tracking

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SEO

.htaccess Redirect Generator

Generate Apache .htaccess redirect rules

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SEO

Rich Snippet Preview

Preview how your page appears in Google search results

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SEO

Anchor Text Analyzer

Analyze anchor text distribution in your HTML content

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SEO

Social Media Image Sizes

Reference guide for social media image dimensions

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Math & Number Tools

Built for quick calculations where a focused page is faster than a spreadsheet.

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Math

Percentage Calculator

Calculate percentages, increases, and decreases

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Math

Number Base Converter

Convert between binary, octal, decimal, and hex

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Math

Unit Converter

Convert between common units of measurement

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Math

Temperature Converter

Convert between Celsius, Fahrenheit, Kelvin, and more

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Math

Aspect Ratio Calculator

Calculate and maintain aspect ratios

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Math

Bytes Converter

Convert between bytes, KB, MB, GB, and TB

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Math

Scientific Notation

Convert between standard and scientific notation

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Math

Random Number Generator

Generate random numbers within a range

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Math

Factorial Calculator

Calculate factorials and permutations

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Math

GCD/LCM Calculator

Calculate greatest common divisor and least common multiple

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Math

Roman Numeral Converter

Convert between Roman numerals and decimal numbers

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Math

Statistics Calculator

Calculate mean, median, mode, and standard deviation

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Math

Hex/Decimal Converter

Convert between hexadecimal and decimal numbers

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Math

Prime Number Checker

Check if a number is prime and find nearby primes

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Math

Fibonacci Sequence Generator

Generate Fibonacci numbers up to any position

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Math

Quadratic Equation Solver

Solve quadratic equations step by step

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Math

Fraction Calculator

Add, subtract, multiply, and divide fractions

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Math

Matrix Calculator

Perform matrix operations: add, multiply, transpose, determinant

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Math

Probability Calculator

Calculate probabilities for common scenarios

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Math

Average & Mean Calculator

Calculate mean, median, mode, and range

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Math

Exponent Calculator

Calculate powers, roots, and exponential expressions

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Math

Logarithm Calculator

Calculate logarithms with any base

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Math

Ratio & Proportion Calculator

Solve ratios and proportions with missing values

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Math

Binary Arithmetic Calculator

Perform arithmetic operations on binary numbers

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Math

Standard Deviation Calculator

Calculate standard deviation and variance

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Math

Area Calculator

Calculate area of common geometric shapes

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Design & Color Tools

Built for designers and frontend developers who need quick CSS-ready values.

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Design

Color Converter

Convert colors between HEX, RGB, and HSL

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Design

Color Palette Generator

Generate harmonious color palettes from a base color

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Design

Color Contrast Checker

Check WCAG color contrast ratios for accessibility

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Design

CSS Gradient Generator

Create CSS linear and radial gradients visually

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Design

CSS Box Shadow Generator

Design CSS box shadows with a visual editor

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Design

Border Radius Preview

Preview and generate CSS border-radius values

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Design

CSS Unit Converter

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

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Design

Color Blindness Simulator

Simulate how colors look with color vision deficiency

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Design

Placeholder Image Generator

Generate placeholder images for mockups and development

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Design

SVG to CSS Background

Convert SVG code to CSS background-image data URI

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Design

Font Pair Suggester

Get font pairing suggestions for your designs

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Design

Tailwind to CSS

Convert Tailwind CSS classes to plain CSS

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Design

Color Name Finder

Find the closest named color for any hex value

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Design

CSS Grid Generator

Visually create CSS Grid layouts and get the code

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Design

Flexbox Playground

Experiment with CSS Flexbox properties visually

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Design

CSS Animation Generator

Create CSS keyframe animations visually

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Design

CSS Filter Playground

Preview CSS filter effects with interactive controls

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Design

Typography Scale Generator

Generate harmonious typography scales for your design system

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Design

Spacing Scale Generator

Generate consistent spacing scales for design systems

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Design

CSS Text Shadow Generator

Create CSS text-shadow effects with live preview

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Design

CSS Transform Visualizer

Visualize CSS transform properties interactively

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Design

Dark Mode Color Generator

Generate dark mode color schemes from light mode palettes

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Design

Glassmorphism CSS Generator

Create frosted glass effects with CSS

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Design

Neumorphism CSS Generator

Create soft UI neumorphism effects with CSS

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Design

Blob Shape Generator

Generate random organic blob shapes as SVG

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Design

Wave SVG Generator

Create wave dividers and backgrounds as SVG

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Design

App Icon Size Reference

Complete reference for app icon sizes across platforms

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Productivity Tools

Built for fast everyday workflows that should not require a login or a project workspace.

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Productivity

Pomodoro Timer

Stay focused with the Pomodoro technique timer

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Productivity

QR Code Generator

Generate QR codes for URLs, text, and more

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Productivity

WiFi QR Code Generator

Create QR codes for joining WiFi networks

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Productivity

Password Generator

Generate strong, secure passwords

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Productivity

Password Strength Checker

Check how strong your password is

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Productivity

Email Validator

Validate email address format and syntax

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Productivity

Email Normalizer

Normalize email addresses for deduplication

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Productivity

IP Address Info

Look up information about any IP address

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Productivity

Device Information

Inspect browser, screen, network, and locale details

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Productivity

Timezone Converter

Convert time between different timezones

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Productivity

Date Calculator

Calculate date differences and project dates by days, workdays, weeks, or months

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Productivity

Age Calculator

Calculate your exact age in years, months, and days

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Productivity

Countdown Timer

Set a countdown timer with alarm

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Productivity

Stopwatch

Precise stopwatch with lap timing

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Productivity

World Clock

View current time across multiple timezones

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Productivity

Notepad

Quick notepad with auto-save to browser

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Productivity

Checklist Generator

Create and manage interactive checklists

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Productivity

Text to Speech

Convert text to spoken audio using browser speech synthesis

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Productivity

Chinese Zodiac Calculator

Find your Chinese zodiac animal and element from your birth year

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Productivity

BMI Calculator

Calculate your Body Mass Index

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Productivity

Meeting Cost Calculator

Calculate the hourly cost of your meetings

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Productivity

Typing Speed Test

Test your typing speed and accuracy

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Productivity

Habit Tracker

Track daily habits and build streaks

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Productivity

Daily Planner

Plan your day with time blocks and tasks

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Productivity

Break Reminder Timer

Get reminded to take regular breaks while working

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Productivity

Decision Maker

Make random decisions with a spinning wheel

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Productivity

Coin Flip Simulator

Flip a virtual coin with animated results

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Productivity

Dice Roller

Roll virtual dice with custom sides and quantities

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Productivity

Time Tracker

Track time spent on tasks and projects

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Productivity

Sleep Calculator

Calculate ideal bedtime and wake-up times based on sleep cycles

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Productivity

Calorie Calculator

Calculate daily calorie needs based on your goals

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Productivity

TDEE Calculator

Calculate your Total Daily Energy Expenditure

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Productivity

Body Fat Calculator

Estimate body fat percentage using body measurements

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Productivity

Random Color Generator

Generate random colors in hex, RGB, and HSL

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Productivity

Screen Resolution Info

View your screen resolution and display information

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Finance Tools

Built for quick estimates and scenario comparison, with reminders to verify financial decisions against official or professional sources.

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Finance

Compound Interest Calculator

Calculate compound interest and investment growth

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Finance

Loan Calculator

Calculate monthly payments and total loan cost

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Finance

Tip Calculator

Calculate tips and split bills easily

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Finance

Currency Converter

Convert between world currencies with live rates

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Finance

Sales Tax Calculator

Calculate sales tax on purchases

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Finance

ROI Calculator

Calculate return on investment

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Finance

Savings Goal Calculator

Plan how to reach your savings target

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Finance

Invoice Generator

Create professional invoices quickly

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Finance

Mortgage Calculator

Calculate monthly mortgage payments and total interest

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Finance

Net Worth Calculator

Calculate your total net worth from assets and liabilities

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Finance

Retirement Calculator

Plan your retirement savings and income

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Finance

Debt Payoff Calculator

Plan your debt repayment strategy

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Finance

Emergency Fund Calculator

Calculate your ideal emergency fund size

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Finance

Tax Bracket Calculator

Calculate federal income tax by bracket

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Finance

Hourly to Salary Converter

Convert between hourly wage and annual salary

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Finance

Markup vs Margin Calculator

Calculate and convert between markup and profit margin

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Finance

Discount Calculator

Calculate discounted prices and savings

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Finance

Stock Return Calculator

Calculate stock investment returns and gains

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Finance

Break-Even Calculator

Calculate your business break-even point

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Finance

Paycheck Calculator

Estimate your take-home pay after deductions

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Finance

Inflation Calculator

Calculate the impact of inflation on purchasing power

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Finance

Future Value Calculator

Calculate the future value of an investment

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Finance

Amortization Schedule

Generate a complete loan amortization table

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Finance

Cost Per Unit Calculator

Compare prices by calculating cost per unit

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Finance

Rent vs Buy Calculator

Compare the costs of renting vs buying a home

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Finance

Credit Card Payoff Calculator

Calculate how long to pay off credit card debt

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Finance

NZ PAYE Calculator

Calculate New Zealand take-home pay with PAYE, ACC, KiwiSaver, and student loan

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