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Free browser-based utilities for images, PDFs, code, networking, and more. Files are processed locally — nothing leaves your device. No signup, no limits, no nonsense.

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Image Cropper QR Code Generator JSON Formatter Password Generator PNG to JPG Converter What Is My IP Word Counter
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Color Contrast Checker Base64 Encoder/Decoder Image Compressor Timezone Converter Merge PDF Split PDF Background Remover Image Resizer
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AI Image Caption & Alt Text Generator Password Breach Checker Regex Tester Age Calculator Bill Splitter Subnet Calculator Color Picker AI Text Summarizer
Tool of the day
Math & Numbers Runs locally

Ratio Calculator

Simplify ratios, scale to a target value, compare two ratios for equivalence, and convert between ratios, fractions, and percentages. Aspect ratio presets included.

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Image Tools

Image Cropper

Crop images visually with aspect ratio presets and social media sizes — Instagram, YouTube, Twitter, and more.

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Data & Files

QR Code Generator

Generate QR codes for URLs, text, email, WiFi, and phone numbers with custom colors and sizes. Download PNG instantly.

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Developer Tools

JSON Formatter

Format, validate, and minify JSON instantly — with configurable indentation, error location, and tree view.

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Security & Privacy

Password Generator

Generate cryptographically secure passwords with custom length (8–128), character sets, entropy display, and exclude-ambiguous option. Runs in your browser.

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Categories

Image Tools
Background Remover Image Cropper HEIC to JPG Converter HEIC to PNG Converter PNG to JPG Converter PNG to WebP Converter +36 more 
PDF Tools
Merge PDF Split PDF JPG to PDF PDF to PowerPoint PDF to Word Compress PDF +6 more 
Text Tools
Text Cleaner Word Counter Case Converter Sort Lines Remove Duplicate Lines Remove Empty Lines +14 more 
Developer Tools
JSON Formatter AI Token Counter Base64 Encoder/Decoder JWT Decoder URL Encoder/Decoder XML Formatter +30 more 
Security & Privacy
Password Generator Password Breach Checker Password Strength Meter TOTP Code Generator
Math & Numbers
Fraction Calculator Ratio Calculator Exponent & Power Calculator Square Root Calculator Logarithm Calculator GCD & LCM Calculator +19 more 
Unit Converters
Unit Converter
Time & Date
Timezone Converter Date Difference Calculator Age Calculator Countdown Timer Stopwatch Business Days Calculator +4 more 
Colour Tools
Color Contrast Checker Color Palette Generator Color Picker Tint & Shade Generator Color Blindness Simulator
Data & Files
QR Code Generator Barcode Generator Fake Data Generator
Finance
Mortgage Calculator Loan Calculator Compound Interest Calculator Profit Margin Calculator Tip Calculator Bill Splitter +4 more 
SEO & Web
Robots.txt Generator Meta Tag Previewer Schema Markup Generator XML Sitemap Generator UTM Builder
Audio & Video
Speech to Text
Fun & Random
Coin Flip Dice Roller Wheel Spinner
Encryption & Decryption
AES Encrypt AES Decrypt RSA Encrypt RSA Decrypt
Hash Generator & Lookup
MD5 Hash Generator MD5 Decrypt — Hash Lookup SHA-256 Hash Generator SHA-256 Decrypt — Hash Lookup Bcrypt Hash Generator Bcrypt Hash Verifier
Encoding & Decoding
Morse Code Encoder Morse Code Decoder Base64 Encoder Base64 Decoder
Classical Ciphers
ROT13 Encoder ROT13 Decoder Caesar Cipher Encoder Caesar Cipher Decoder
Gaming
Reaction Time Test CPS Test Keyboard Tester Mechanical Switch Finder Mouse Sensitivity Converter Crosshair Generator +18 more 
Social Media
Social Media Image Resizer TikTok Video Downloader YouTube Video Downloader
Network & IP
What Is My IP WebRTC Leak Checker IP Geolocation Lookup Subnet Calculator Download Time Calculator MAC Address Generator +9 more 
Calculators
BMI Calculator Recipe Scaler

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About Kordu

239 free browser-based tools for image conversion, PDF processing, developer utilities, gaming performance, and more. Files are processed locally — nothing leaves your device. No signup, no limits, no nonsense.

Built by KORDU LTD, London.