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Toolkits for Everyone

70+ tools for developers, designers, and everyday productivity. No signup required — open and use instantly.

Popular Tools

Formatters & Beautifiers

Format and beautify code in many programming languages

JSON Formatter
Format, validate, and beautify JSON data online for free. Minify or prettify JSON with syn...
HTML Formatter
Format and beautify HTML code online for free. Auto-indent nested tags with syntax highlig...
CSS Formatter
Format and beautify CSS code online. Minify or prettify stylesheets with one click.
JavaScript Formatter
Format and beautify JavaScript code online for free. Customize indentation and style.
SQL Formatter
Format and beautify SQL queries online. Supports MySQL, PostgreSQL, and SQLite dialects.
XML Formatter
Format and beautify XML documents online. Minify or prettify XML with syntax highlighting.
YAML ↔ JSON Converter
Convert between YAML and JSON formats online. Auto-detects input format with error highlig...

Encoders & Decoders

Encode and decode data in various formats

Base64 Encode / Decode
Encode and decode Base64 data online for free. Supports text and file encoding with instan...
URL Encode / Decode
Encode and decode URLs online for free. Supports component encoding and full URL encoding.
HTML Entity Encode / Decode
Encode and decode HTML entities online. Supports named and numeric entities.
JWT Decoder
Decode and inspect JWT tokens online. View header, payload, and signature with expiration ...
Unicode Escape / Unescape
Escape and unescape Unicode characters online. Supports \uXXXX and other formats.

Generators

Generate random data, codes, and identifiers

UUID Generator
Generate random UUIDs (v1 and v4) online for free. Bulk generate up to 100 UUIDs with cust...
Password Generator
Generate strong, random passwords online for free. Customize length, character types, and ...
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text online. Choose paragraphs, sentences, or words.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes online for free. Supports text and file hashi...
Random Color Generator
Generate random colors with HEX, RGB, and HSL values. Lock colors and regenerate the rest.
Regex Tester
Test regular expressions online with real-time matching, group highlighting, and replace f...
Cron Expression Generator
Build and interpret cron expressions visually. See next execution times and human-readable...
QR Code Generator
Generate QR codes from text or URLs for free. Customize size, error correction, and colors...

Converters

Convert between different data formats and units

Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milli...
Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal, and any base (2-36).
Color Converter
Convert colors between HEX, RGB, HSL, HSV, and CMYK formats with a visual color picker.
Unit Converter
Convert between common units including length, weight, temperature, area, volume, data, an...
CSS Unit Converter
Convert between CSS units: px, rem, em, pt. Set custom root font size for accurate rem cal...
Markdown to HTML
Convert Markdown to HTML online with live preview. Supports GitHub Flavored Markdown.
CSV to JSON
Convert CSV data to JSON format online. Supports custom delimiters and file upload.
Image Format Converter
Convert images between PNG, JPEG, WebP, and BMP formats in your browser. No upload require...
Timezone Converter
Convert times between any time zones around the world. Compare multiple zones side by side...

Text Tools

Manipulate, analyze, and transform text

Word & Character Counter
Count words, characters, sentences, paragraphs, and lines online. Includes reading time es...
Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, ...
Text Diff Checker
Compare two texts and highlight differences. Shows additions, deletions, and modifications...
Duplicate Line Remover
Remove duplicate lines from text online. Preserves order with case-sensitive options.
String Escape / Unescape
Escape and unescape strings for JSON, JavaScript, Java, Python, and XML formats.
Text to Slug
Convert text to URL-friendly slugs. Lowercase, replace spaces with hyphens, remove special...

Color Tools

Pick, convert, and create color palettes

Color Palette Generator
Generate color palettes from a base color. Create complementary, analogous, triadic, and s...
Color Contrast Checker
Check color contrast ratios against WCAG AA and AAA standards. Preview text with live colo...

CSS Tools

Generate and preview CSS properties

CSS Box Shadow Generator
Generate CSS box-shadow visually with sliders. Supports multiple layers, inset, and live p...
CSS Gradient Generator
Generate CSS linear, radial, and conic gradients visually. Add multiple color stops with l...
CSS Border Radius Generator
Generate CSS border-radius visually with individual corner controls and live preview.
CSS Flexbox Playground
Learn and experiment with CSS Flexbox visually. Control all container and item properties ...
CSS Grid Generator
Build CSS Grid layouts visually. Set rows, columns, gaps, and merge cells with live previe...

Calculators

Calculate and convert numeric values

Aspect Ratio Calculator
Calculate and convert aspect ratios. Input width and height to find the ratio, or use a ra...
Percentage Calculator
Calculate percentages: X% of Y, percentage change, and more. Instant results with formulas...
Basic Calculator
A simple online calculator with addition, subtraction, multiplication, and division. Suppo...
Date / Time Calculator
Calculate the difference between dates, add or subtract days, find the day of the week, an...
Age Calculator
Calculate your exact age in years, months, days, hours, and minutes from your date of birt...
Countdown Timer
Create a live countdown to any future date — birthdays, holidays, exams, weddings, product...

Finance Tools

Loans, taxes, interest, and personal finance calculators

Loan Calculator
Calculate monthly loan payments, total interest, and a full amortization schedule. Support...
Compound Interest Calculator
Calculate how your investments grow with compound interest. Supports initial deposit, mont...
Income Tax Calculator (China)
Calculate Chinese individual income tax (IIT) on monthly salary. Includes social insurance...

Health Tools

Health and wellness calculators for everyday life

BMI Calculator
Calculate your Body Mass Index (BMI) instantly. Supports both metric (kg/cm) and imperial ...

Image Tools

Process and convert images right in your browser

Image Compressor
Compress images in your browser for free. Adjust quality, see file size reduction. No serv...
Image Resizer
Resize images in your browser for free. Set custom dimensions with aspect ratio lock. No s...
SVG to PNG Converter
Convert SVG to PNG in your browser. Customize output size and background color. No server ...

Other Tools

Other developer and productivity tools

Favicon Generator
Upload an image to generate favicons in all required sizes. Get link tags and manifest.jso...
Meta Tag Generator
Generate SEO-optimized meta tags including Open Graph and Twitter Cards. Preview Google se...
Placeholder Image Generator
Generate placeholder images of any size with custom colors and text. Download PNG or SVG.
IP Lookup
Look up any IP address to find its geolocation, country, city, ISP, timezone, and more. Sh...