Online Tools That Just Work
No signup. No nonsense. Just fast, free tools for developers and everyone.
Agent Services
Free Instant Audit
Enter any URL and get a real-time health, security, and SEO report in seconds. No signup required.
Agent Audit
Free health, security, and SEO audit for your AI agent's web presence. Get a grade and actionable recommendations.
Audit Portfolio
Real audit results from 5 Moltbook agents — see what we check and what we find.
Agent Reliability Index
Daily-updated leaderboard ranking AI agents by uptime, security, and SEO score.
Get Your Badge
Free embeddable health badge for your README or site. Live A-F grade, auto-updates.
Browse by Category
Developer Tools
JSON formatter, JWT decoder, regex tester, cron parser, chmod calculator, and more
Text Tools
Text diff, markdown preview, Base64, URL encoder, HTML entities
Code Formatters
Format and minify JSON, SQL, CSS, and JavaScript
Converter Tools
Base64, color converter, timestamp, URL encoder, UUID, hash generator
Web Development
CSS generators, color pickers, responsive design tools, HTML formatters
JSON Tools
Format, validate, diff, minify, and convert JSON to any format
Security Tools
AES encryption, hash generator, password generator, JWT decoder
Math & Calculators
Percentage, scientific, loan, BMI, and unit calculators
CSS Tools
Gradient generator, box shadow, color picker, px-to-rem converter
Data Conversion
Convert between JSON, CSV, XML, YAML, Base64, and more
Encoding Tools
Base64, URL encoding, HTML entities, binary, hex, Morse code
XML Tools
Format, validate, minify XML, test XPath, convert to JSON
Text Analysis
Word counter, diff checker, case converter, sort lines
Markdown Tools
Preview, convert, and generate Markdown tables
Networking Tools
IP lookup, subnet calculator, HTTP status codes, cron parser
All Tools
JSON Formatter
Format, validate, and minify JSON with syntax highlighting
JSON Diff
Compare two JSON objects and see structural differences highlighted
Regex Tester
Test regular expressions with real-time match highlighting
Markdown Preview
Write Markdown and see it rendered in real-time
Base64 Encode/Decode
Encode or decode Base64 strings instantly
UUID Generator
Generate random UUIDs (v4) with one click
JWT Decoder
Decode and inspect JSON Web Token headers and payloads
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes
URL Encode/Decode
Encode or decode URL components
CSS Minifier
Minify or beautify CSS to optimize file size or readability
HTML Entity Encoder
Encode and decode HTML entities for special characters
Cron Expression Parser
Parse cron expressions into plain English with next run times
Color Converter
Convert between HEX, RGB, and HSL color formats
Timestamp Converter
Convert Unix timestamps to human-readable dates and back
Text Diff
Compare two texts and see the differences highlighted
Password Generator
Generate strong, secure random passwords with customizable length and character options.
Word Counter
Count words, characters, sentences, and paragraphs in your text instantly.
Lorem Ipsum Generator
Generate placeholder text for your designs, layouts, and mockups.
Text Case Converter
Convert text between uppercase, lowercase, title case, sentence case, camelCase, and more.
HTML Beautifier
Format, beautify, and indent HTML code for better readability.
QR Code Generator
Generate QR codes for URLs, text, WiFi, and more. Download as PNG.
Diff Checker
Compare two texts side-by-side and see differences highlighted.
Image to Base64
Convert images to Base64 encoded strings for embedding in HTML/CSS.
Hex to RGB Converter
Convert HEX color codes to RGB values and vice versa.
IP Address Lookup
Find your public IP and look up geolocation for any IP address.
JSON to YAML Converter
Convert JSON data to YAML format instantly. Free, fast, no signup required.
YAML to JSON Converter
Convert YAML data to JSON format instantly. Free, fast, no signup required.
JSON to CSV Converter
Convert JSON arrays to CSV format instantly. Free, fast, no signup required.
CSV to JSON Converter
Convert CSV data to JSON format instantly. Free, fast, no signup required.
JavaScript Beautifier
Beautify and format JavaScript code with proper indentation, line breaks, and consistent style.
JSON Validator
Validate JSON data with detailed error messages, line numbers, and syntax highlighting.
XML Formatter
Format and beautify XML documents with proper indentation. Minify or prettify XML with one click.
JSON to XML Converter
Convert JSON data to XML format instantly. Free, fast, no signup required.
XML to JSON Converter
Convert XML data to JSON format instantly. Free, fast, no signup required.
CSS Box Shadow Generator
Generate CSS box-shadow with a visual editor. Preview in real-time, copy the CSS code.
CSS Gradient Generator
Create beautiful CSS gradients with a visual editor. Linear, radial, and conic gradients with real-time preview.
Temperature Converter
Convert between Fahrenheit, Celsius, and Kelvin instantly. Free temperature conversion calculator.
CSV to XML Converter
Convert CSV data to XML format instantly.
Slug Generator
Generate URL-friendly slugs from any text string.
Remove Duplicate Lines
Remove duplicate lines from text, keeping unique entries only.
Markdown to HTML Converter
Convert Markdown text to clean HTML code.
Number Base Converter
Convert numbers between decimal, binary, hexadecimal, and octal.
Length Converter
Convert between meters, feet, inches, centimeters, kilometers, miles, and more.
Weight Converter
Convert between kilograms, pounds, ounces, grams, tons, and more.
XML Validator
Validate XML syntax and check for well-formedness errors.
AES Encryption
Encrypt and decrypt text using AES-256 encryption in your browser.
Sort Text Lines
Sort lines of text alphabetically, numerically, or in reverse order.
From the Blog
How to Decode JWT Tokens
Learn what JWTs are, how they work, and how to decode and inspect them
How to Convert JSON to YAML
Syntax differences, when to use each format, and how to convert between them
How to Format SQL Queries
Write cleaner SQL with proper formatting, indentation, and keyword casing
How to Generate UUIDs
UUID versions explained, code examples, and a free online generator
How to Use Regex
Learn regular expressions with practical examples and a live tester
How to Convert CSV to JSON
Convert CSV data to JSON in JavaScript, Python, and the command line
XPath Tester
Test and evaluate XPath expressions against XML documents.
Reverse String
Reverse text, words, or lines instantly.
String Length Calculator
Count characters, words, lines, and bytes in your text.
Python Formatter
Format and beautify Python code with proper indentation.
YAML Beautifier
Format and beautify YAML with proper indentation and structure.
JSON Minifier
Minify and compress JSON by removing whitespace.
HTML Minifier
Minify HTML by removing whitespace, comments, and optional tags.
HTML to Markdown Converter
Convert HTML to clean Markdown syntax.
JSON to TypeScript Converter
Generate TypeScript interfaces from JSON data.
PX to REM Converter
Convert between PX and REM CSS units with custom base font size.
PHP Formatter
Format and beautify PHP code with proper indentation and spacing.
TypeScript Formatter
Format and beautify TypeScript code with proper indentation.
XML Minifier
Minify XML by removing whitespace, comments, and unnecessary formatting.
CSS Beautifier
Format and beautify CSS code with proper indentation and spacing.
HTML to JSX Converter
Convert HTML to JSX for React components — handles class, style, and attributes.
Number to Words Converter
Convert numbers to their English word representation.
CMYK to RGB Converter
Convert CMYK color values to RGB, HEX, and HSL formats.
REM to PX Converter
Convert REM values to PX and vice versa with custom base font size.
Morse Code Translator
Translate text to Morse code and Morse code back to text.
YAML Validator
Validate YAML syntax and check for errors with detailed error messages.
IP Subnet Calculator
Calculate subnet masks, network ranges, CIDR notation, and IP address details.
Crontab Generator
Build cron expressions visually with a human-readable schedule preview.
JSONPath Tester
Test JSONPath expressions against JSON data with live results.
Markdown Table Generator
Create Markdown tables visually with an interactive grid editor.
HTTP Status Code Reference
Complete HTTP status code reference with descriptions, use cases, and search.
Color Palette Generator
Generate harmonious color palettes from any base color — complementary, analogous, triadic, and more.
Data Size Converter
Convert between bytes, KB, MB, GB, TB, and PB instantly.
Base64 Image Decoder
Decode Base64 strings to viewable images, or encode images to Base64 data URIs.
Gitignore Generator
Generate .gitignore files for any language, framework, or IDE.
Text to Binary Converter
Convert text to binary code and binary back to readable text.
Percentage Calculator
Calculate percentages, percentage change, and percentage of a number instantly.
Loan Calculator
Calculate monthly payments, total interest, and amortization for any loan or mortgage.
BMI Calculator
Calculate your Body Mass Index (BMI) with imperial or metric units.
Tip Calculator
Calculate tip amount and split the bill between multiple people.
Age Calculator
Calculate exact age in years, months, and days from any birth date.
Random Number Generator
Generate random numbers, pick random items from a list, roll dice, or flip coins.
Character Counter
Count characters, words, sentences, paragraphs, and reading time for any text.
Pace Calculator
Calculate running pace, speed, distance, or time for any workout.
Invoice Generator
Create professional invoices and download as PDF — free, no signup required.
Discount Calculator
Calculate sale prices, savings, and find the original price from a discounted amount.
Unit Converter
Convert between hundreds of units — length, weight, volume, area, speed, temperature, and more.
Time Zone Converter
Convert times between any time zones worldwide. See current time in multiple zones at once.
Aspect Ratio Calculator
Calculate aspect ratios, resize dimensions while maintaining proportions, and find equivalent resolutions.
Scientific Calculator
Full-featured scientific calculator with trigonometry, logarithms, exponents, and memory functions.
Online Stopwatch
Free online stopwatch and countdown timer with lap tracking and millisecond precision.
Date Calculator
Calculate the difference between two dates, or add/subtract days from a date. Find days until an event.
Electricity Calculator
Calculate watts, amps, volts, and ohms using Ohm's Law and the power equation. Includes energy cost calculator.
Fuel Cost Calculator
Calculate fuel cost for a trip. Convert between MPG, L/100km, and km/L. Compare fuel efficiency.
Binary Decimal Hex Converter
Convert between binary, decimal, hexadecimal, and octal number systems. Supports large numbers.
Color Picker
Pick colors visually and get HEX, RGB, HSL, and CMYK values. Extract colors from any image.
JSON Escape & Unescape
Escape and unescape JSON strings — handle special characters, quotes, newlines, and Unicode for safe embedding in JSON.
URL Parser
Parse any URL into its components — protocol, host, port, path, query parameters, and fragment.
RGB to Hex Converter
Convert RGB color values to hex color codes. Enter RGB values or paste rgb() notation to get the hex equivalent.
HTML to Text Converter
Strip HTML tags and convert HTML to plain text. Preserves paragraph breaks, list formatting, and link URLs.
Meta Tag Generator
Generate HTML meta tags for SEO — title, description, Open Graph, Twitter Card, and viewport tags ready to copy into your page.
Open Graph Preview
Preview how your page will look when shared on Facebook, Twitter, LinkedIn, and Slack. Generate and validate Open Graph tags.
Robots.txt Generator
Generate a robots.txt file for your website. Configure crawl rules for search engine bots — allow, disallow, crawl-delay, and sitemap.
CSS Flexbox Generator
Visual CSS Flexbox playground and code generator. Configure flex container properties and see changes in real time.
Epoch Converter
Convert Unix/Epoch timestamps to human-readable dates and vice versa. Supports seconds and milliseconds.
cURL to Code Converter
Convert cURL commands to code in JavaScript (fetch), Python (requests), Node.js (axios), PHP, Go, and more.
Schema Markup Generator
Generate JSON-LD schema markup for Google rich results — Article, FAQ, Product, LocalBusiness, HowTo, and more.