🆕 New Tools Just Added!
We've recently expanded our collection with powerful new SEO, PDF, Social Media & Developer tools:
- 🔍 Keyword Density Checker – Analyze keyword frequency and density in your content instantly. Best SEO tool for avoiding keyword stuffing.
- 📄 PDF Merger – Combine multiple PDF files into one document instantly. Works offline, privacy-first, no upload limits.
- 📸 Instagram Hashtag Generator – Find the best hashtags for your posts, reels, and stories. Boost reach and engagement.
- 🎨 CSS Generators Bundle – Create Box Shadows, Gradients, Border Radius & Text Shadows with live preview and copy-paste code.
- 🪙 Solana Staking Calculator – Estimate SOL staking rewards, APY & yearly earnings instantly.
- 📌 Pinterest Hashtag Generator – Generate trending Pinterest hashtags that drive traffic.
- 🔍 AI Content Detector – Instantly detect AI-generated text from ChatGPT, Gemini, Claude & more.
- 🖼️ AI Image Prompt Generator – Create professional prompts for Midjourney, DALL-E 3 & Stable Diffusion.
All tools are 100% free, work client-side in your browser, and require no signup.
Health & Fitness
❤️ BMI Calculator
Calculate your Body Mass Index based on WHO standards to track your health status.
🔥 BMR Calculator
Calculate Basal Metabolic Rate and TDEE to find your daily calorie needs.
🍎 Calorie Calculator
Calculate daily calories for weight loss, maintenance, or muscle gain goals.
⚖️ Ideal Weight Calculator
Calculate ideal body weight in kg based on height, age & gender using medical formulas.
💧 Water Intake Calculator
Calculate daily water intake by weight, activity level, climate & special conditions.
Body Fat Calculator
Calculate body fat percentage using US Navy Method or BMI. Track lean body mass.
Waist-Hip Ratio Calculator
Calculate WHR, check health risk, and classify body shape instantly.
🥗 Macro Calculator
Calculate daily protein, carbs & fat macros for weight loss or muscle gain.
🎬 Media & Social
📸 Instagram Hashtag Generator New
Find the best hashtags for your posts, reels & stories. Boost reach, engagement & followers with optimized tags.
YouTube Thumbnail Downloader
Download high-quality thumbnails from any YouTube video for your projects and inspiration.
📱 QR Code Generator
Create and download custom PNG QR codes instantly for websites, contact info, or payments.
🖼️ Image Compressor
Reduce image sizes quickly without losing quality for faster uploads and web performance.
Text to Speech
Convert any text into natural-sounding speech directly in your browser, no downloads needed.
📌 Pinterest Hashtag Generator New
Generate SEO-optimized Pinterest hashtags that drive traffic, boost pin visibility & grow your account.
🧮 Financial Calculators
🏠 EMI Calculator
Compute monthly EMIs and total interest for loans with detailed amortization schedules.
🧾 GST Calculator
Quickly add or remove GST at different rates for accurate billing and calculations.
% Percentage Calculator
Calculate percentages, proportional increases or decreases, and comparative ratios.
🎂 Age Calculator
Find your exact age in years, months, and days with an easy-to-use interface.
📅 Date Difference
Calculate the time elapsed between two dates in days, months, and years.
💰 RPM Earnings Calculator
Estimate ad revenue from RPM and views, including 5000 RPM income in USD, USDT and INR.
📊 AdSense Earnings & RPM Calculator
Estimate your daily, monthly and yearly AdSense income using RPM, CPC and pageviews.
📈 SIP Calculator
Plan monthly investments and see total investment, returns and maturity value.
💵 Compound Interest Calculator
See how a lump sum grows with compound interest over different time periods.
⚖️ Break Even Calculator
Find the sales volume and revenue needed to cover fixed and variable costs.
🪙 Solana Staking Calculator New
Estimate SOL staking rewards, APY & yearly earnings. Learn how much SOL to stake and calculate passive income.
🔁 Converters, PDF & Formatters
💱 Currency Converter
Get live foreign exchange rates and convert money across currencies instantly.
📐 Unit Converter
Convert length, weight, temperature, and other units with ease and accuracy.
{ } JSON Formatter
Format, minify or validate JSON data quickly for developers and content creators.
🔗 URL Encoder / Decoder
Encode or decode URLs safely using secure standard techniques.
Base64 Encoder / Decoder
Convert text between Base64 and normal strings for data processing and transmission.
PDF Merger New
Combine multiple PDF files into one document instantly. Works offline, privacy-first, no upload limits.
📦 PDF Compressor
Reduce PDF file size for email and uploads without losing readability. Perfect for resumes and invoices.
🖼️ Image to PDF Converter
Convert JPG/PNG photos and scans into a clean multi-page PDF. Great for assignments and receipts.
️ Text, SEO & Developer Tools
🔍 Keyword Density Checker New
Analyze keyword frequency & density in your content. Best SEO tool to avoid keyword stuffing & optimize articles.
🎨 CSS Generators Bundle New
Create Box Shadows, Gradients, Border Radius & Text Shadows with live preview and copy-paste code.
📝 Plagiarism Checker
Free plagiarism checker to detect duplicate content online. Check your text for originality, privacy-first.
📝 Word Counter
Easily count words, characters, paragraphs, and other text elements.
📋 Compare Text
View side-by-side differences between two text blocks for editing and comparison.
🔑 Secure Password Generator
Generate strong, random passwords with letters, numbers and symbols – fully client-side.
🤖 AI Shortcuts & Generators
🔍 AI Content Detector New
Free AI checker to instantly detect AI-generated text from ChatGPT, Gemini, Claude & more. 100% free.
️ AI Image Prompt Generator New
Free AI image prompt generator for Midjourney, DALL-E 3, Stable Diffusion & Google Gemini. 20+ art styles.
Perplexity AI
Use AI-powered search to get instant answers, research insights and real-time information.
Claude AI
Smart AI assistant for writing, coding, and generating high-quality content quickly.
✍️ Copy AI
Create marketing copy, blog ideas, and social media content using AI tools.
Notion AI
Boost productivity with AI-powered note-taking, writing, and idea generation tools.
✨ AI Caption Generator
Generate viral captions for Instagram, Pinterest & YouTube instantly with AI.
#️⃣ AI Hashtag Generator
Generate trending hashtags for Instagram, Pinterest & YouTube to boost reach and engagement.
Frequently Asked Questions (FAQ)
Try Our Latest Tools!
Don't miss our newest additions including Keyword Density Checker, PDF Merger, Instagram Hashtag Generator, CSS Generators Bundle, Solana Staking Calculator, and more — all completely free and ready to use right now.
🔍 → Keyword Density Checker | 📄 → PDF Merger | 📸 → Instagram Hashtag Generator | → CSS Generators Bundle | 🪙 → Solana Staking Calculator | 🤖 → AI Content Detector
Need Help? support@toolastra.com | 💬 Contact Form