Browse Tools by Category
Explore our complete collection of free online tools, organized by category.
Developer
34 tools
JSON Formatter & Validator
Clean, prettify, and validate your JSON strings with ease.
Codex Auth Converter
Convert 9router Codex connections into downloadable auth JSON files.
Base64 Encoder & Decoder
Encode or decode text and images to Base64 format instantly.
QR Code Generator
Generate free QR codes for URLs, text, and more. Customize colors and size.
Unix Epoch Converter
Convert Unix timestamps to human-readable dates and vice versa.
Byte Converter
Convert between data units: Bytes, KB, MB, GB, TB, PB and more.
UUID Generator
Generate random (v4) or time-ordered (v7) UUIDs instantly.
Color Palette Generator
Generate beautiful color palettes with harmony modes.
Color Converter
Convert colors between HEX, RGB, HSL, and CMYK formats.
Gradient Generator
Create beautiful CSS gradients with live preview.
2FA / TOTP Code Generator
Generate TOTP codes for two-factor authentication. Compatible with Google Authenticator, Authy and more.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes from text.
Number Base Converter
Convert numbers between decimal, binary, octal, and hexadecimal.
URL Encoder/Decoder
Encode or decode URL strings for safe transmission.
HTML/XML Encoder
Encode or decode HTML and XML entities for safe web display.
Case Converter
Transform text case: uppercase, lowercase, title case, and more.
Gzip Compress/Decompress
Compress or decompress text using Gzip compression.
JSON Escape/Unescape
Escape or unescape special characters in JSON strings.
Cron Expression Parser
Parse and explain cron expressions with next run times.
Regex Tester
Test regular expressions with real-time matching and highlighting.
Text Diff Comparison
Compare two texts and see the differences highlighted.
Markdown Preview
Write and preview Markdown in real-time with HTML export.
JWT Decoder
Decode and inspect JSON Web Tokens (header, payload, signature).
Chmod Calculator
Convert Linux file permissions between Octal and Symbolic formats.
CSS/JS Minifier
Compress CSS and JavaScript code to reduce file size.
IP Subnet Calculator
Calculate network, broadcast, host ranges, and more from IP/CIDR.
Composerize
Convert Docker Run commands to Docker Compose YAML format.
Docker Compose Builder
Build Docker Compose and Stack files visually with validation and download.
JSON Diff
Compare two JSON objects semantically and find differences.
CSV to JSON Converter
Convert CSV data to JSON format with customizable parsing options.
JSON to CSV Converter
Convert JSON arrays and objects to CSV, TSV, or semicolon-separated format.
Nginx Config Generator
Visual builder for Nginx configurations — reverse proxy, static site, PHP-FPM, and load balancer.
.env Validator
Validate .env file format — detect duplicates, empty values, invalid keys, and mismatched quotes.
Dockerfile Generator
Generate production-ready Dockerfiles with best practices — multi-stage builds, non-root user, healthchecks.
DevOps
6 tools
Cron Expression Parser
Parse and explain cron expressions with next run times.
Composerize
Convert Docker Run commands to Docker Compose YAML format.
Docker Compose Builder
Build Docker Compose and Stack files visually with validation and download.
Nginx Config Generator
Visual builder for Nginx configurations — reverse proxy, static site, PHP-FPM, and load balancer.
.env Validator
Validate .env file format — detect duplicates, empty values, invalid keys, and mismatched quotes.
Dockerfile Generator
Generate production-ready Dockerfiles with best practices — multi-stage builds, non-root user, healthchecks.
Finance
7 tools
Compound Interest Calculator
Calculate how your savings grow over time with compounding.
Loan Calculator
Calculate monthly loan payments and view amortization schedule.
EMI Calculator
Calculate Equated Monthly Installment for your loans.
Investment Growth Calculator
Project investment growth with compound interest and contributions.
Savings Goal Calculator
Calculate required monthly savings to reach your financial goal.
Freelancer Income Calculator
Calculate freelance income from hourly rate with tax breakdown.
Percentage Calculator
Calculate percentages, percent change, and percentage differences.
Math
16 tools
Compound Interest Calculator
Calculate how your savings grow over time with compounding.
Unit Converter
Convert length, weight, temperature and more between units.
Byte Converter
Convert between data units: Bytes, KB, MB, GB, TB, PB and more.
Random Number Generator
Generate random numbers with customizable ranges and options.
Loan Calculator
Calculate monthly loan payments and view amortization schedule.
EMI Calculator
Calculate Equated Monthly Installment for your loans.
Investment Growth Calculator
Project investment growth with compound interest and contributions.
Savings Goal Calculator
Calculate required monthly savings to reach your financial goal.
Number Base Converter
Convert numbers between decimal, binary, octal, and hexadecimal.
BMI Calculator
Calculate your Body Mass Index and weight category (WHO standards).
Percentage Calculator
Calculate percentages, percent change, and percentage differences.
Stopwatch & Timer
Accurate online stopwatch and countdown timer with laps.
Wheel of Names
Spin a colorful wheel to randomly select a name or item from your list.
Calorie Calculator
Calculate daily calorie needs using the Mifflin-St Jeor equation — BMR, TDEE, and weight goals.
Macro Calculator
Calculate daily protein, carbs, and fat intake from calorie targets with diet presets.
Body Fat Calculator
Estimate body fat percentage using the US Navy method with ACE classification.
Text
7 tools
Word Counter
Count words, characters, sentences, and analyze keyword density.
Case Converter
Transform text case: uppercase, lowercase, title case, and more.
Lorem Ipsum Generator
Generate placeholder text for your designs and mockups.
Text Line Tools
Sort, reverse, filter, and transform text lines.
Text Diff Comparison
Compare two texts and see the differences highlighted.
Markdown Preview
Write and preview Markdown in real-time with HTML export.
Duplicate Finder
Find duplicate lines in a list of text.
Security
9 tools
Codex Auth Converter
Convert 9router Codex connections into downloadable auth JSON files.
Base64 Encoder & Decoder
Encode or decode text and images to Base64 format instantly.
Secure Password Generator
Create secure, random passwords with custom requirements.
UUID Generator
Generate random (v4) or time-ordered (v7) UUIDs instantly.
2FA / TOTP Code Generator
Generate TOTP codes for two-factor authentication. Compatible with Google Authenticator, Authy and more.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes from text.
JWT Decoder
Decode and inspect JSON Web Tokens (header, payload, signature).
Chmod Calculator
Convert Linux file permissions between Octal and Symbolic formats.
IP Subnet Calculator
Calculate network, broadcast, host ranges, and more from IP/CIDR.
Design
7 tools
Color Palette Generator
Generate beautiful color palettes with harmony modes.
Color Converter
Convert colors between HEX, RGB, HSL, and CMYK formats.
Gradient Generator
Create beautiful CSS gradients with live preview.
Image Resizer
Resize and compress images directly in your browser.
Image Compressor
Compress images to reduce file size without losing quality.
Lorem Ipsum Generator
Generate placeholder text for your designs and mockups.
CSS/JS Minifier
Compress CSS and JavaScript code to reduce file size.
Marketing
5 tools
QR Code Generator
Generate free QR codes for URLs, text, and more. Customize colors and size.
Word Counter
Count words, characters, sentences, and analyze keyword density.
Image Resizer
Resize and compress images directly in your browser.
Image Compressor
Compress images to reduce file size without losing quality.
Campaign URL Builder
Build UTM campaign URLs for tracking with Google Analytics.
Health
5 tools
BMI Calculator
Calculate your Body Mass Index and weight category (WHO standards).
Calorie Calculator
Calculate daily calorie needs using the Mifflin-St Jeor equation — BMR, TDEE, and weight goals.
Macro Calculator
Calculate daily protein, carbs, and fat intake from calorie targets with diet presets.
Heart Rate Zones
Calculate 5 personalized training zones using the Karvonen formula for optimal heart rate training.
Body Fat Calculator
Estimate body fat percentage using the US Navy method with ACE classification.