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Featured Tools
View allCrypto Profit Calculator
Calculate your cryptocurrency profit or loss with ROI percentage based on buy and sell prices.
Loan Calculator
Calculate monthly payments, total interest, and view amortization schedule for any loan.
Text to Speech
Convert text to spoken words using browser voices with speed and pitch controls.
43 tools found
Crypto Profit Calculator
Calculate your cryptocurrency profit or loss with ROI percentage based on buy and sell prices.
DCA Calculator
Plan your Dollar Cost Averaging strategy with investment amount, frequency, and duration.
Loan Calculator
Calculate monthly payments, total interest, and view amortization schedule for any loan.
Compound Interest Calculator
See how your money grows over time with compound interest at different frequencies.
Currency Converter
Convert between 150+ world currencies with real-time exchange rates.
Stock ROI Calculator
Calculate stock investment returns with total ROI, annualized return, and CAGR metrics.
Inflation Calculator
See how inflation affects purchasing power using US CPI historical data.
Tip Calculator
Calculate tip amount and split the bill between multiple people with quick presets.
Margin Calculator
Calculate gross margin, markup, and profit. Find selling price from target margin.
SIP Calculator
Calculate returns on your Systematic Investment Plan with visual breakdown.
Discount Calculator
Calculate final price and savings after applying single or multiple percentage discounts.
Word Counter
Count words, characters, sentences, paragraphs, and estimate reading time.
Character Counter
Count characters with and without spaces, plus letter frequency analysis.
Case Converter
Convert text to uppercase, lowercase, title case, sentence case, or toggle case.
Lorem Ipsum Generator
Generate placeholder lorem ipsum text for your designs and mockups.
Text Wrap Remover
Remove unwanted line breaks and text wrapping. Clean up text from PDFs, emails, and formatted documents.
Password Generator
Create secure random passwords with customizable options and strength meter.
Text to Speech
Convert text to spoken words using browser voices with speed and pitch controls.
JSON Formatter
Format, validate, and beautify JSON with syntax highlighting.
Base64 Encoder
Encode and decode text to and from Base64 format instantly.
URL Encoder
Encode and decode URLs and query strings safely.
Color Converter
Convert between HEX, RGB, and HSL color formats with live preview.
QR Code Generator
Generate QR codes for URLs, text, and contact information.
Number Base Converter
Convert numbers between decimal, binary, octal, and hexadecimal formats instantly.
PDF Merge
Merge multiple PDF files into one. Rearrange pages and download the merged PDF.
QR Code Reader
Scan QR codes using your camera or upload an image. Instantly decode URLs and text.
Age Calculator
Calculate your exact age in years, months, and days. Get a countdown to your next birthday.
BMI Calculator
Calculate your Body Mass Index (BMI) and check your health category with visual scale.
Sleep Calculator
Find optimal sleep and wake times based on 90-minute sleep cycles.
Percentage Calculator
Calculate percentages: X% of Y, what % X is of Y, and percentage change between values.
Fibonacci Calculator
Calculate Fibonacci numbers, view the full sequence, and explore the golden ratio approximation.
Time Zone Converter
Convert time between any two time zones worldwide. Perfect for scheduling across regions.
Unit Converter
Convert length, weight, temperature, speed, area, and volume between metric and imperial units.
Countdown Timer
Count down to any date and time. Perfect for events, deadlines, and reminders.
Stopwatch
Measure elapsed time with millisecond precision, start/stop/reset, and lap functionality.
Image Compressor
Compress images with adjustable quality. Reduce file size while maintaining quality.
Image Resizer
Resize images to specific dimensions or by percentage. Maintain aspect ratio option available.
Image Cropper
Crop images with precision. Choose aspect ratios or free-form crop, preview, and download.
Random Number Generator
Generate random numbers within a range. Customize count, duplicates, sorting, and decimals.
JSON to CSV
Convert JSON arrays to CSV format. Handles nested objects by flattening keys with dot notation.
CSS Gradient Generator
Create beautiful CSS gradients with live preview. Choose colors, direction, and copy CSS code.
Text to Binary
Convert text to binary and vice versa. Includes ASCII reference table for common characters.
Markdown Preview
Live markdown editor with instant preview. Write markdown and see rendered HTML in real-time.
Why Choose Tonle?
Finance & Crypto Tools
Track your crypto investments, plan DCA strategies, calculate loan payments, and understand compound interest. Our currency converter uses real-time exchange rates for accurate conversions.
Word & Text Tools
Count words and characters, convert text cases, generate lorem ipsum for mockups, and create secure passwords. Perfect for writers, editors, and developers.
Developer Utilities
Format JSON, encode Base64 and URLs, convert colors between formats, and generate QR codes instantly. All tools work offline and respect your privacy.
Health Tools
Calculate your exact age with birthday countdown, check your BMI with visual health categories, and track your wellness metrics.
Math & Utility Tools
Calculate percentages, convert between time zones, and handle unit conversions for length, weight, temperature, and more.
Privacy First, Always
Tonle provides free, browser-based tools that respect your privacy. All calculations happen locally on your device — we never send your data to a server. Whether you're calculating investment returns, formatting code, or generating passwords, our tools are fast, reliable, and completely free.