Every tool you need, in one place
Free online tools for text, calculations, dates, development, and conversions.
Fast, private, and runs entirely in your browser.
Image to Text (OCR)
Extract text from images using OCR. Supports JPG, PNG, WebP, and more.
Image Compressor
Compress images to reduce file size while maintaining quality.
Image Resizer
Resize images to any dimension. Maintain aspect ratio or set custom sizes.
Image Format Converter
Convert images between PNG, JPG, WebP, and BMP formats.
Image Cropper
Crop images to any size with a visual editor. Download instantly.
Image to Base64
Convert any image to a Base64 encoded string for embedding in code.
Background Remover
Remove image backgrounds instantly. Download transparent PNG files for free.
Merge PDF
Combine multiple PDF files into one document. Fast and free.
Images to PDF
Convert multiple images into a single PDF document.
Word & Character Counter
Count words, characters, sentences, and paragraphs in your text instantly.
Case Converter
Convert text to uppercase, lowercase, title case, sentence case, and more.
Lorem Ipsum Generator
Generate placeholder text for your designs and layouts.
Text to Slug
Convert any text into a URL-friendly slug instantly.
Remove Duplicate Lines
Remove duplicate lines from your text and keep only unique entries.
Markdown Preview
Write Markdown and see a live preview side by side. Export to HTML.
Text Diff Checker
Compare two texts and see the differences highlighted line by line.
CSV to JSON
Convert CSV data to JSON format instantly. Supports custom delimiters.
Scientific Calculator
Full-featured scientific calculator with trigonometry, logarithms, and more.
Age Calculator
Calculate your exact age in years, months, days, hours, and minutes.
Percentage Calculator
Calculate percentages, percentage change, and percentage difference.
BMI Calculator
Calculate your Body Mass Index and find your healthy weight range.
Loan EMI Calculator
Calculate monthly EMI, total interest, and payment schedule for loans.
Discount Calculator
Calculate sale price, savings amount, and discount percentage instantly.
Compound Interest Calculator
Calculate compound interest with monthly, quarterly, or yearly compounding.
Tip Calculator
Calculate tip amount and split the bill between multiple people.
QR Code Generator
Generate QR codes for URLs, text, WiFi, email, and more. Download as PNG.
Password Generator
Generate strong, secure passwords with customizable length and characters.
Hash Generator
Generate SHA-1, SHA-256, SHA-512 hashes from any text instantly.
Color Palette Generator
Generate beautiful color palettes from a base color. Copy HEX codes.
Invoice Generator
Create professional invoices and download them as PDF. Free and easy.
JSON Formatter
Format, validate, and beautify JSON data with syntax highlighting.
Base64 Encode/Decode
Encode text to Base64 or decode Base64 strings instantly.
Color Picker & Converter
Pick colors and convert between HEX, RGB, and HSL formats.
Regex Tester
Test regular expressions against text with real-time match highlighting.
HTML Encode/Decode
Encode special characters to HTML entities or decode them back.
JWT Decoder
Decode and inspect JWT tokens. View header, payload, and expiration.
Date Difference Calculator
Find the exact difference between two dates in years, months, and days.
Add or Subtract Days
Add or subtract days, weeks, months, or years from any date.
Countdown Timer
Create a countdown to any date and see the time remaining live.
Age in Detail
Know your age broken down into months, weeks, days, hours, and seconds.
Unit Converter
Convert between length, weight, temperature, and more common units.
Why Alventra.io?
100% Free
All tools are completely free to use with no hidden charges.
Privacy First
Everything runs in your browser. Your data never leaves your device.
No Sign-up
Start using any tool instantly. No account or registration needed.