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Free Online Tools

Explore Knexio's collection of 70+ free online tools for writing, content creation, coding, finance, and productivity. All tools work directly in your browser with no signup required.

Writing & Text
All-in-One

Text Analyzer

Complete text statistics: words, characters, sentences, paragraphs, and syllables in one tool.

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Writing

Word Counter

Count words, characters, sentences, and paragraphs in your text instantly.

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Writing

Reading Time Calculator

Estimate reading time for articles and blog posts based on word count.

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Text

Case Converter

Convert text to uppercase, lowercase, title case, or sentence case instantly.

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Text

Text Diff Checker

Compare two texts and highlight differences with side-by-side view.

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Text

Word Frequency Counter

Count word frequency and generate frequency distribution charts.

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Text

Text Case Counter

Count uppercase and lowercase letters with percentage breakdown.

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Text

Text to Binary Converter

Convert text to binary code and decode binary back to text.

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Text

Morse Code Converter

Convert text to Morse code and decode Morse code back to text.

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Text

Roman Numeral Converter

Convert numbers to Roman numerals and vice versa.

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Text

Word Wrap Tool

Wrap text at specific column widths for code formatting.

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Developer Tools
Code

JSON Formatter

Format and validate JSON data with syntax highlighting.

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Code

Base64 Encoder/Decoder

Encode and decode Base64 strings for text and images.

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Code

Hash Generator

Generate MD5, SHA-1, SHA-256, and other cryptographic hashes.

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Code

URL Encoder/Decoder

Encode special characters in URLs and decode encoded URLs.

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Code

Regex Tester

Test and debug regular expressions with live matching.

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Code

Number Base Converter

Convert between binary, decimal, hexadecimal, and octal.

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Code

HTML Entity Encoder

Encode and decode HTML entities for web development.

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Code

CSS Minifier

Minify CSS code by removing whitespace and comments.

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Code

JSON to CSV Converter

Convert JSON data to CSV format for spreadsheets.

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Code

XML Formatter

Format XML documents with proper indentation.

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Code

SQL Formatter

Format SQL queries with consistent indentation.

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Code

Code Beautifier

Format and beautify code in various programming languages.

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Code

API Tester

Test REST API endpoints with different HTTP methods.

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Code

JWT Decoder

Decode JSON Web Tokens to view header and payload.

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Calculators
Calculator

BMI Calculator

Calculate Body Mass Index with health category indicators.

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Calculator

Age Calculator

Calculate exact age in years, months, weeks, and days.

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Calculator

Loan Calculator

Calculate monthly loan payments and amortization schedule.

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Calculator

Compound Interest Calculator

Calculate compound interest growth over time.

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Calculator

Percentage Calculator

Calculate percentages and percentage changes instantly.

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Calculator

Tip Calculator

Calculate restaurant tips with split bill features.

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Calculator

Unit Converter

Convert between length, weight, temperature, and volume units.

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Calculator

Time Zone Converter

Convert times between different time zones.

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Calculator

Calorie Calculator

Calculate daily calorie needs based on activity level.

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Calculator

Days Between Dates

Calculate days between two dates with weekend exclusion.

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Calculator

Scientific Calculator

Advanced calculator with trigonometric and logarithmic functions.

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Calculator

Random Number Generator

Generate random numbers within specified ranges.

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Design & Media
Design

Color Picker

Pick colors and get HEX, RGB, HSL, and CMYK values.

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Design

HEX to RGB Converter

Convert HEX color codes to RGB values with preview.

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Design

CSS Gradient Generator

Create beautiful CSS gradients with color pickers.

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Design

Image Compressor

Compress and optimize images while maintaining quality.

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Design

Image to Base64

Convert images to Base64 strings for embedding.

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Design

Aspect Ratio Calculator

Calculate aspect ratios for images and videos.

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Design

QR Code Generator

Generate QR codes for URLs, text, and contact info.

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Design

Favicon Generator

Create favicons in multiple sizes and formats.

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Design

Text to Speech

Convert text to speech with different voices and speeds.

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Productivity & Utility
Utility

Password Generator

Create strong, secure passwords with custom settings.

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Utility

Password Strength Checker

Check password strength with improvement suggestions.

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Utility

Timer & Stopwatch

Online timer and stopwatch with countdown and lap timing.

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Utility

Markdown Preview

Live preview Markdown text as rendered HTML.

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Utility

Lorem Ipsum Generator

Generate placeholder text for design mockups.

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Utility

Remove Duplicate Lines

Remove duplicate lines from text while maintaining order.

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Utility

Credit Card Validator

Validate credit card numbers with card type detection.

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Utility

IP Address Lookup

Lookup IP address information and geolocation.

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Utility

Screen Resolution Detector

Detect your screen resolution and viewport dimensions.

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Utility

URL Slug Generator

Create URL-friendly slugs from text.

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Utility

Currency Formatter

Format currency values according to international standards.

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Utility

Unix Timestamp Converter

Convert Unix timestamps to readable dates.

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SEO

Meta Tag Generator

Generate meta tags for SEO including Open Graph tags.

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SEO

Keyword Density Checker

Analyze keyword density for SEO optimization.

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SEO

Instagram Hashtag Generator

Generate relevant Instagram hashtags for your content.

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AI

AI Prompt Word Counter

Specialized word counter for AI prompts with token estimation.

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Utility

UUID Generator

Generate UUID v1, v4, v7 for unique identifiers.

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Developer

YAML Formatter

Format, validate, and convert YAML to JSON.

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Developer

Cron Expression Generator

Visual cron expression builder with examples.

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Health

Heart Rate Calculator

Calculate target heart rate zones for exercise.

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Utility

YouTube Timestamp Generator

Generate clickable YouTube timestamps.

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Design

CSS Gradient Generator

Create CSS gradients with visual preview.

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Design

Lottie Player

View and test Lottie JSON animations online.

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Utility

iCal Generator

Create .ics calendar files for any calendar app.

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Accessibility

Color Contrast Checker

Check WCAG color contrast compliance.

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Productivity

Pomodoro Timer

Focus timer using the Pomodoro technique.

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Developer

Markdown to HTML

Convert Markdown to HTML instantly.

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Utility

IP Address Lookup

Find location and ISP info for any IP address.

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Developer

Regex Tester

Test regular expressions in real time.

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Utility

Barcode Generator

Generate barcodes in CODE128, EAN-13, UPC-A, and QR Code formats.

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Writing

Count Sentences in Text

Count sentences in text with detailed analysis for academic writing.

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Developer

CSV to JSON Converter

Convert CSV data to JSON format instantly.

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Utility

File Converter

Convert files between different formats online.

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Design

HSL to RGB Converter

Convert HSL color values to RGB and HEX.

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Design

Image Resizer

Resize images to any dimension without losing quality.

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Business

Invoice Generator

Create professional invoices for your clients.

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Developer

oEmbed Generator

Generate oEmbed code for embedding media content.

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Developer

Pagination Generator

Generate pagination links for website navigation.

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Utility

PDF to Image Converter

Convert PDF pages to images instantly.

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Utility

PDF to Word Converter

Convert PDF documents to editable Word files.

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Utility

PIN Code Generator

Generate random secure PIN codes.

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Utility

Quote Generator

Generate random inspirational quotes.

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Developer

Random String Generator

Generate random strings and passwords.

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AI

Screenshot to Text (OCR)

Extract text from screenshots using OCR.

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Writing

Sentence Length Checker

Check and analyze sentence length in your text.

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Utility

Website Screenshot

Capture full-page screenshots of any website.

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Utility

Website Speed Test

Test your website loading speed and performance.

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About Knexio Tools

Knexio provides a comprehensive collection of free online tools designed to help with writing, content creation, web development, and productivity. Our tools are built to work directly in your browser, requiring no downloads or installations.

Why Choose Knexio Tools?

100% Free: All tools are completely free with no hidden charges or premium tiers.

No Registration Required: Use any tool without creating an account or providing personal information.

Browser-Based: Works on any device with a modern web browser – no software installation needed.

Privacy Focused: Your data stays in your browser. We don't store or track your input.

Regular Updates: We continuously add new tools and improve existing ones based on user feedback.