Apps & Utilities

Text

Text Case Converter

Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case and more in one click.

Open tool Text

Word & Character Counter

Count words, characters, sentences, and paragraphs in real time, with estimated reading and speaking time.

Open tool Text

Text Difference Checker

Compare two texts line by line and instantly highlight added, removed, and unchanged lines.

Open tool Text

Lorem Ipsum Generator

Generate classic Lorem Ipsum placeholder text by paragraphs, sentences, or words, ready to copy.

Open tool Encoding & Crypto

Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 back to text, with full Unicode and emoji support.

Open tool Encoding & Crypto

URL Encoder & Decoder

Percent-encode text for safe use in URLs, or decode an encoded URL back to readable text.

Open tool Encoding & Crypto

HTML Encoder & Decoder

Convert special characters to HTML entities (&, <, >) or decode entities back to plain text.

Open tool Encoding & Crypto

Hash Generator (MD5, SHA-1, SHA-256)

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text, computed instantly in your browser.

Open tool Developer

JSON Formatter & Validator

Format, beautify, validate, and minify JSON with clear error messages pointing at the problem.

Open tool Developer

UUID Generator

Generate cryptographically random version-4 UUIDs, one or in bulk, and copy them instantly.

Open tool Developer

Regex Tester

Test regular expressions against sample text with live match highlighting and capture-group output.

Open tool Developer

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and back: seconds or milliseconds, local time and UTC.

Open tool Generators

Password Generator

Generate strong, cryptographically random passwords with custom length and character sets.

Open tool Generators

UTM Builder / Generator

Build campaign-tracking URLs with UTM parameters, including source, medium, campaign, term, and content, and copy the ready-to-use link.

Open tool Generators

QR Code Generator

Create QR codes for URLs, text, Wi-Fi, contacts, email, SMS, or phone numbers, and download as PNG or SVG.

Open tool Generators

Barcode Generator

Generate CODE128, EAN-13, UPC, and other barcodes from text or numbers, and download as PNG.

Open tool Color & Design

CSS Gradient Generator

Design linear and radial CSS gradients visually and copy production-ready CSS code.

Open tool Color & Design

Color Converter (HEX, RGB, HSL)

Convert colors between HEX, RGB, and HSL formats with a live preview swatch.

Open tool Calculators

Percentage Calculator

Calculate what X% of Y is, what percent X is of Y, and percentage increase or decrease.

Open tool Calculators

Age Calculator

Calculate exact age in years, months, and days from a date of birth, plus days until the next birthday.

Open tool Calculators

BMI Calculator

Calculate Body Mass Index from height and weight in metric or imperial units, with WHO category.

Open tool Calculators

Unit Converter

Convert length, weight, temperature, data size, and speed between metric and imperial units.

Open tool Calculators

Currency Converter

Convert between 30+ world currencies using daily European Central Bank reference rates.

Open tool Developer

JWT Decoder

Decode a JSON Web Token's header and payload instantly, with human-readable expiry and issued-at times.

Open tool Developer

HTTP Status Codes Reference

Search and filter every common HTTP status code with plain-English meanings and real-world context.

Open tool Developer

JSON Diff Checker

Compare two JSON documents structurally and see exactly which keys were added, removed, or changed.

Open tool Automation & APIs

Cron Expression Builder

Build a cron schedule visually or paste one to parse, then get a plain-English translation and the next 10 run times.

Open tool Automation & APIs

CSV to JSON Converter

Convert CSV to JSON or JSON back to CSV instantly, with header detection and array validation.

Open tool Automation & APIs

YAML to JSON Converter

Convert YAML to JSON or JSON back to YAML instantly, with clear parse-error messages.

Open tool Text

Markdown Previewer

Write Markdown on one side and see the rendered preview update live on the other.

Open tool Text

Slug Generator

Turn any title or phrase into a clean, URL-safe slug, with accents normalized and separators collapsed.

Open tool Developer

OG Meta Tag Preview

Preview how a page will look when shared on Twitter/X, Facebook, LinkedIn, and Google, then copy the meta tags.

Open tool Media & Files

Image Compressor

Compress and resize JPEG, PNG, and WebP images entirely in your browser, with no upload and adjustable quality.

Open tool Media & Files

Favicon Generator

Turn one image into a complete favicon set, from 16px through 512px, with Apple Touch and Android icons included.

Open tool Media & Files

QR Code Scanner

Decode a QR code from an uploaded image or your device camera, and nothing leaves your browser.

Open tool Media & Files

PDF Merge & Split

Combine multiple PDFs into one file, or extract specific pages into a new PDF, entirely in your browser.

Open tool Automation & APIs

Fake Data Generator

Generate mock API and test payloads, including names, emails, phones, addresses, UUIDs, and dates, as ready-to-use JSON or CSV.

Open tool Automation & APIs

Webhook & cURL Request Builder

Build a webhook or API request visually and get a ready-to-run cURL command and JavaScript fetch() snippet, live as you type.

Open tool Marketing

Ad Copy Character Counter

Check headlines, body text, and descriptions against real Google, Meta, LinkedIn, and X ad character limits before you publish.

Open tool Marketing

Email Subject Line Tester

Preview how your subject line and preheader look in Gmail and Apple Mail, check them against real client truncation points, and scan for common spam-trigger words.

Open tool Marketing

Readability Score Checker

Score any copy for readability with Flesch Reading Ease and Flesch-Kincaid Grade Level, live as you type.

Open tool Marketing

A/B Test Significance & Sample Size Calculator

Check whether an A/B test result is statistically significant, or calculate the sample size you need before you launch one.

Open tool Marketing

Social Media Image Resizer

Upload one photo and instantly generate perfectly cropped, correctly sized images for Instagram, Facebook, X, LinkedIn, and YouTube, with no distortion and no design tool required.

Open tool Marketing

llms.txt Generator

Generate a spec-compliant llms.txt file (the file AI models like Claude, ChatGPT, and Perplexity read to understand your site) from your site name, summary, and doc links.

Open tool Marketing

Schema Markup Generator (JSON-LD)

Generate valid JSON-LD structured data for Article, FAQ, Product, and Local Business schema, then paste it straight into your <head> for richer Google results and better AI citability.

Open tool Marketing

Robots.txt Generator

Build a robots.txt file with custom Allow/Disallow rules, your sitemap URL, and one-click toggles to block or allow AI crawlers like GPTBot and ClaudeBot.

Open tool Generators

Random Number Generator

Generate one or many random integers or decimals in a custom range, with optional no-duplicates and sorting.

Open tool Generators

Password Strength Checker

Check how strong a password really is, including entropy estimate, character variety, and specific weaknesses like repeats or common patterns, entirely in your browser.

Open tool Developer

Number Base Converter

Convert numbers between Binary, Octal, Decimal, and Hexadecimal instantly, with all four bases shown at once.

Open tool Calculators

Timezone Converter

Convert a date and time from one timezone to several others at once, showing meeting times across cities instantly, with DST handled automatically.

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