All Tools
Browse every calculator, converter, and utility available on Surn.
Calculators
Scientific Calculator
Advanced browser-based scientific calculator.
Fraction Calculator
Add, subtract, multiply, and divide fractions.
Date Calculator
Calculate days between dates or add/subtract time.
Percentage Calculator
Calculate percentages, percentage change, and percentage of a number.
Age Calculator
Calculate exact age in years, months, and days from a date of birth.
Discount Calculator
Calculate the discounted price and amount you save.
Finance
Compound Interest Calculator
Calculate compound interest growth over time.
Loan Calculator
Plan your loans with a full amortisation schedule.
EMI Calculator
Calculate monthly EMI for home, car, or personal loans.
SIP Calculator
Estimate returns on Systematic Investment Plan (SIP) investments.
GST Calculator
Calculate GST amount and total price including or excluding GST.
Health & Fitness
Converters
Developer Tools
JSON Formatter
Format, validate, and beautify JSON data instantly.
Word Counter
Count words, characters, sentences, and paragraphs in your text.
Password Generator
Generate secure, random passwords instantly.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 to text.
URL Encoder / Decoder
Encode or decode URL parameters and strings.
Case Converter
Convert text between uppercase, lowercase, camelCase, and more.
Image Tools
Image Compressor
Compress images without losing visible quality — right in your browser.
Background Remover
Remove background from images and make them transparent online for free.
Resize Image
Resize JPG, PNG, and WebP images by pixels or percentage.
Crop Image
Crop JPG, PNG, or WebP images to custom dimensions or standard aspect ratios.
Convert to JPG
Convert PNG, WebP, GIF, or SVG images to high-quality JPG.
Convert from JPG
Convert JPG images to PNG or modern WebP format.
Rotate Image
Rotate and flip images 90, 180, or 270 degrees clockwise or counter-clockwise.
Watermark Image
Add text or logo image watermarks to protect your photos.
Photo Editor
Enhance photos with brightness, contrast, saturation, and artistic filter presets.
Meme Generator
Create funny memes online with custom top and bottom text.
HEIC to JPG
Convert Apple HEIC photos to standard JPG format.
Image to Text (OCR)
Extract text from images using optical character recognition.
QR Code Generator
Create custom QR codes for URLs, text, or contact info.
File & PDF Tools
Merge PDF
Combine multiple PDF files into one single document.
Split PDF
Separate PDF pages or extract page ranges into separate files.
Compress PDF
Optimize and reduce PDF file size directly in your browser.
PDF to JPG
Convert PDF pages into high-resolution JPG images.
JPG to PDF
Convert JPG and PNG images into a clean PDF document.
Rotate PDF
Rotate PDF pages permanently by 90, 180, or 270 degrees.
Delete PDF Pages
Remove unwanted pages from your PDF document easily.
Extract PDF Pages
Extract selected pages from a PDF into a new document.
Watermark PDF
Add custom text watermarks to your PDF documents.
Add Page Numbers
Add sequential page numbers to your PDF document.