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Rozkit — Free Online Tools: PDF Merger, JPG to PDF, Image Compressor, Digital Signature Generator, Resume Maker, Password Generator, QR Code & Text Utilities

Free online tools — fast, simple & Mobile friendly

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Free Tools

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Word Counter

Count words, characters, and sentences online.

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Password Generator

Create secure random passwords online.

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QR Code Generator

Create custom QR codes instantly.

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JSON Formatter

Format and beautify JSON data easily.

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Color Picker

Get HEX, RGB, and HSL color codes.

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Age Calculator

Calculate your exact age quickly.

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Speed Test

Check your internet speed instantly.

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AI Info

Master prompt engineering with 150+ keywords & examples.

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AI Detector

Detect whether a text was written by AI or a human.

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BMI Calculator

Calculate Body Mass Index (BMI) based on height and weight.

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IQ Test

Take a quick IQ test and see your score.

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Pregnancy Calculator

Calculate estimated due date and pregnancy week based on last period date.

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Stylish Name Generator

Generate stylish and fancy text versions of a name for social media bios.

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Video Cutter

Trim and cut video files directly in your browser.

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Wheel Spinner

Spin the wheel for random picks, names, and decisions.

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Signature Generator

Design an authentic handwritten signature with ink textures.

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Text Cleaner

Clean, format, and convert text instantly.

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Image Compressor

Reduce image size without quality loss.

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Image Resizer

Resize photos to any dimension instantly.

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PNG to JPG

Convert PNG to JPG in seconds.

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Merge PDF

Combine multiple PDFs into one.

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JPG to PDF

Convert images to PDF format.

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Unix Timestamp

Convert Unix timestamp to date and time.

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Baby Name Generator

Generate beautiful baby names with meanings and filters.

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Resume Builder

Build professional ATS-friendly resumes and CVs easily.

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Max Calculator

Advanced math, finance, and scientific calculator suite.

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Keyword Generator

Generate SEO keywords, search volume, and difficulty insights.

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Case Converter

Convert text between uppercase, lowercase, title case, and more.

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Invoice Generator

Create professional invoices, quotes, and receipts instantly.

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Cover Letters

Build tailored cover letters with templates and keyword analysis.

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Typing Speed Test

Assess your typing speed, accuracy, and words per minute.

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Coming Soon5 Tools

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URL Shortener

Shorten long links instantly.

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PDF to Word

Convert PDF to editable Word files.

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Background Remover

Remove image backgrounds automatically.

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Image to Text

Extract text from images using OCR.

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Translate

Translate text to any language instantly.

Knowledge Base & Guides

Guides & Articles

View All Articles (31)

Health & FitnessAugust, 2026

How to Calculate BMI Accurately: Formula, Categories, and Health Implications

Learn how Body Mass Index (BMI) is calculated, its mathematical formulas, age/gender factors, limitations, and how to accurately interpret your BMI score.

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Design & UI/UXAugust, 2026

Guide to Web Color Harmonies: Palettes, Contrast & Accessibility for Web Designers

Master color theory for modern web design. Learn about monochromatic, analogous, complementary, triadic color schemes, WCAG contrast ratios, and HSL/OKLCH color math.

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Artificial IntelligenceAugust, 2026

Understanding AI Text Detectors: How Perplexity, Burstiness & Token Probabilities Work

Explore the internal architecture of AI text classifiers. Learn how language models predict tokens, how detectors compute perplexity and burstiness, and their accuracy limitations.

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