Free Online Tools & Calculators for Everyday Tasks & Precision
Fast, accurate, and privacy-first online utilities. Simplify ratios, calculate loan payments, compress images, format code, count characters, and generate invoices—100% client-side.
Trending Tools
Most used tools right now
Ratio Calculator
Simplify ratios to lowest terms, find greatest common divisors (GCD), and scale aspect ratios with step-by-step math.
Readability Checker
Score text readability using Flesch Reading Ease, Flesch-Kincaid Grade Level, and Gunning Fog metrics.
Profit Margin Calculator
Calculate gross margin, cost of goods, markup percentages, and total profit margins for business pricing.
Percentage Calculator
Calculate percentage values, percentage increase/decrease, discounts, and ratio conversions instantly.
Calculators
Ratio solver, percentage change, weighted grades, date difference, GPA & BMI
Image Tools
Image compressor, resizer, cropper, WebP converter, JPG to PNG & PNG to JPG
Text Tools
Character counter, remove duplicate lines, case converter, lorem ipsum & SEO tags
Developer Tools
JSON formatter & validator, JWT decoder, diff checker, regex tester, SQL & UUIDs
Basic Utilities
Unit converters (length, weight, temp), barcode generator, QR codes & passwords
Business Tools
Invoice generator, markup vs margin, sales commission, loan EMI & compound interest
Image Compressor
Compress JPG, PNG, and WebP images online without losing quality. Reduce file size up to 90%.
Image Resizer
Resize images to exact dimensions in pixels or percentages while preserving sharp clarity.
Image Cropper
Crop photos freely or with fixed aspect ratios (1:1, 4:3, 16:9) and circular profile cuts.
WebP Converter
Convert images to and from ultra-efficient Google WebP format with full transparency support.
Image Format Converter
Convert images between JPG, PNG, WebP, GIF, BMP, and SVG formats with customizable quality.
Image Rotator
Rotate photos 90° left or right, flip 180°, or adjust rotation by arbitrary degrees.
Image Flipper (Mirror)
Mirror and flip images horizontally or vertically with instant browser preview.
Image Color Picker
Sample exact pixel colors from photos with an eyedropper and extract dominant color palettes.
Image to Base64
Convert images to Base64 data URIs ready to embed directly into HTML, CSS, or JSON.
Base64 to Image
Decode raw Base64 data strings and Data URIs back into downloadable PNG or JPG files.
Image EXIF Viewer
Inspect complete EXIF data, camera details, exposure, ISO, date, and geolocation from photos.
EXIF Remover
Strip hidden GPS location, camera model, and timestamp metadata from photos before sharing.
Favicon Generator
Generate multi-size .ico favicons, Apple Touch icons, web app icons, and HTML meta tags.
Image Blur & Redactor
Blur whole images or redact sensitive areas like faces, numbers, and private documents.
Grayscale & Photo Filters
Convert color pictures to black & white, sepia, invert, or vintage stylized filters.
Passport Photo Maker
Create compliant 2x2" and 35x45mm passport/visa photos with a printable 4x6" multi-photo sheet.
Social Media Resizer
Resize images with 1-click presets for YouTube, Instagram, X/Twitter, LinkedIn, and Facebook.
SVG to PNG / JPG
Render and export vector SVG files to ultra-crisp PNG or JPG raster images at 1x to 8x resolution.
JSON Formatter
Format, indent, beautify, and inspect JSON payloads with collapsible tree view and syntax highlighting.
JSON Validator
Validate JSON structure against RFC 8259, highlight exact syntax errors with line/column pointers.
JSON Minifier
Compress JSON data by stripping whitespace and newlines for high-performance API payloads.
JSON to CSV
Convert complex or flat JSON arrays into standard CSV spreadsheet files with automatic header detection.
CSV to JSON
Parse CSV and TSV spreadsheet tables into clean, structured JSON arrays and objects.
XML Formatter
Format, beautify, and cleanly indent XML documents with proper nesting and attribute spacing.
XML Validator
Validate XML documents for well-formedness, missing closing tags, and attribute syntax errors.
XML ↔ JSON Converter
Convert bidirectional between XML tags and JSON objects with attribute and namespace handling.
YAML Formatter & JSON Converter
Format YAML configurations, check syntax errors, and convert between YAML and JSON.
HTML Formatter
Beautify and indent HTML code with customizable tab spacing and tag hierarchy formatting.
CSS Formatter
Format, beautify, and reorganize CSS style sheets with clean selector and property indentation.
JavaScript Formatter
Beautify and format JavaScript (ES6+) and TypeScript code with clean braces, spacing, and quotes.
HTML Minifier
Compress HTML markup by removing whitespace, comments, and redundant quotes to boost web speed.
CSS Minifier
Compress CSS stylesheets into ultra-lightweight minified code with zero runtime overhead.
JavaScript Minifier
Compact JavaScript code by stripping unused comments and white-spaces for lightning delivery.
Base64 Encoder / Decoder
Encode and decode UTF-8 strings, URL-safe Base64, and binary files with 1-click clipboard copying.
URL Encoder / Decoder
Encode and decode URLs and query parameters using standard RFC 3986 percent-encoding.
JWT Decoder & Inspector
Decode and debug JSON Web Tokens (JWT) locally to inspect header algorithms, payload claims, and expiration dates.
UUID / GUID Generator
Generate RFC 4122 compliant UUID v4 and v1 strings individually or in bulk with custom format options.
Hash Generator
Generate cryptographic checksums in MD5, SHA-1, SHA-256, SHA-384, SHA-512, and HMAC formats.
MD5 Generator
Calculate 128-bit MD5 hash checksums from text strings and code snippets in real time.
SHA-256 Generator
Generate 256-bit SHA-256 cryptographic hash fingerprints using hardware Web Crypto primitives.
Regex Tester
Test, debug, and explain Regular Expressions with real-time match highlighting and capture group breakdowns.
Cron Expression Generator
Build cron expressions with visual minute, hour, day, month pickers and read human-friendly descriptions.
Unix Timestamp Converter
Convert between Unix epoch timestamps (seconds/milliseconds) and formatted human date-times across timezones.
Color Converter
Convert color codes between HEX, RGB, RGBA, HSL, HSLA, HSV, and CMYK with live swatch previews.
HTML Entity Encoder
Encode and decode reserved HTML characters and emojis into named (&, <) or numeric (&#x;) entities.
SQL Formatter
Format and beautify complex SQL queries with uppercase keywords and standardized indentation.
JSON to Code Generator
Convert JSON schemas and data into strongly-typed C#, TypeScript, Java, Python, Go, Kotlin, and Dart classes.
Markdown Live Editor
Write and preview GitHub-flavored Markdown with live HTML rendering and syntax highlighting.
Diff Checker
Compare two code files or text blocks side-by-side with colored addition and deletion highlights.
Code to Image Generator
Transform code snippets into high-resolution images with macOS window frames and gradient themes.
cURL to Code Converter
Convert cURL commands into clean JavaScript Fetch, Axios, Python Requests, Go, and PHP snippets.
Percentage Calculator
Calculate percentage values, percentage increase/decrease, discounts, and ratio conversions instantly.
Percentage Increase Calculator
Calculate percent increase, growth factor, and absolute gain between two numbers with step-by-step math workings.
Percentage Decrease Calculator
Calculate percent drop, reduction factor, and absolute loss between initial and new values with step-by-step formula steps.
Percentage Difference Calculator
Calculate the percentage difference between two values using the standard midpoint average formula with step-by-step workings.
Average Calculator
Calculate the arithmetic mean, median, mode, range, sum, and standard deviation for any dataset.
Weighted Average Calculator
Calculate weighted averages and weighted grades from numbers and assigned weights or percentages with detailed calculation steps.
Ratio Calculator
Simplify ratios to lowest terms, find greatest common divisors (GCD), and scale aspect ratios with step-by-step math.
Proportion Calculator
Solve proportion equations (a/b = c/d), calculate unknown missing values with cross-multiplication, and verify equivalence.
Divide Amount in a Ratio Calculator
Divide any total amount or quantity into shares according to a given ratio with step-by-step breakdowns and percentages.
Equivalent Ratios Calculator
Find equivalent ratios, scale ratios up or down, generate multi-factor ratio tables, and check equivalence with step-by-step math.
Golden Ratio Calculator
Calculate Golden Ratio (Phi = 1.618) dimensions, golden rectangles, typography scales, and harmonic design proportions.
Fraction Calculator
Perform step-by-step fraction addition, subtraction, multiplication, and conversion to decimals.
Fraction to Percentage Calculator
Convert fractions to percentages, decimals, and percent to fraction with step-by-step division and visual representations.
Significant Figures (Sig Fig) Calculator
Count significant figures, round numbers to any degree of precision, and view detailed significance rules.
Scientific Calculator
Full-featured scientific calculator supporting trigonometry, logarithms, exponents, powers, and roots.
Random Number Generator
Generate cryptographically random numbers within any range with unique non-repeating filters.
Prime Number Checker
Determine if any number is prime and calculate complete prime factorization with factor trees.
GCD & LCM Calculator
Compute the Greatest Common Divisor (GCD/GCF) and Least Common Multiple (LCM) for sets of numbers.
Age Calculator
Calculate exact age by date of birth in years, months, days, and get next birthday countdowns.
Date Calculator
Calculate calendar days between two dates or add and subtract business days, weeks, and years.
Time Calculator
Add, subtract, and calculate elapsed time intervals in hours, minutes, and seconds with timesheet tallies.
Sleep Cycle Calculator
Calculate optimal bedtime and wake-up times based on 90-minute REM sleep cycles to prevent sleep inertia.
BMI Calculator
Calculate Body Mass Index (BMI) in metric or imperial units with standard WHO weight classifications.
BMR & TDEE Calorie Calculator
Calculate Basal Metabolic Rate (BMR) and daily caloric burn (TDEE) based on activity levels.
Calorie Deficit Calculator
Calculate daily calorie deficit targets, maintenance expenditure (TDEE), and projected weight loss timelines.
Discount Calculator
Calculate final prices, savings amounts, and percentage reductions with optional sales tax.
Profit Margin Calculator
Calculate gross margin, cost of goods, markup percentages, and total profit margins for business pricing.
ROI Calculator
Calculate Return on Investment (ROI) percentages and annualized investment gains across multi-year horizons.
Compound Interest Calculator
Project savings and investment balances with daily, monthly, or annual compounding and recurring deposits.
Simple Interest Calculator
Calculate simple interest, maturity values, and interest rates using the classic I = P × r × t formula.
Loan & Mortgage Calculator
Calculate monthly loan payments, total financing costs, and interactive amortization payoff schedules.
EMI Calculator
Calculate Equated Monthly Installments (EMI), principal breakdown, and interest costs for any loan.
Salary / Hourly Calculator
Convert between hourly wage, weekly paycheck, monthly earnings, and annual gross salary.
Tip Calculator & Bill Splitter
Calculate gratuity percentages, total bill amounts, and per-person split shares for restaurant dining.
Sales Tax & VAT Calculator
Calculate sales tax, VAT, and GST amounts either added to net totals or extracted from inclusive prices.
University GPA & CGPA Calculator
Calculate semester GPA and cumulative CGPA tailored for Pakistani universities (PU, UET, NUST, FAST, COMSATS, LUMS, HEC).
Cumulative CGPA Calculator
Calculate cumulative CGPA with semester credit hours weighting and target GPA planner.
Length Converter
Convert distance and length units across meters, feet, inches, kilometers, miles, and yards.
Weight & Mass Converter
Convert mass and weight measurements between kilograms, pounds, ounces, grams, stones, and tons.
Temperature Converter
Convert temperatures between Celsius, Fahrenheit, Kelvin, and Rankine with instant formulas.
Area Converter
Convert land and surface area between square meters, square feet, acres, hectares, and square miles.
Volume & Liquid Converter
Convert liquid and solid volumes between liters, gallons, milliliters, fluid ounces, cups, and cubic feet.
Speed Converter
Convert velocity and speed measurements between km/h, mph, m/s, knots, and Mach.
Time Unit Converter
Convert time durations across milliseconds, seconds, minutes, hours, days, weeks, and years.
Data Storage Converter
Convert digital storage and file sizes between Bytes, KB, MB, GB, TB, and bits.
Energy & Work Converter
Convert energy, work, and heat measurements between Joules, Kilojoules, Calories, kWh, and BTU.
Pressure Converter
Convert pressure units across PSI, Bar, Pascals, Atmospheres (atm), and mmHg / Torr.
Word & Character Counter
Count words, characters, sentences, paragraphs, reading times, and social media character limits in real time.
Keyword Density Checker
Analyze keyword density percentages, single-word, and multi-word n-gram frequency to optimize on-page SEO.
Meta Title Generator
Generate click-worthy SEO title tags with real-time character count and Google pixel width limit meters.
Meta Description Generator
Craft compelling meta descriptions with live character and pixel length meters optimized for search clicks.
URL Slug Generator
Convert article titles and headings into clean, lower-cased, SEO-friendly URL slugs with hyphens.
Open Graph (OG) Generator
Generate Facebook, LinkedIn, and social media Open Graph meta tags with live visual card preview.
Twitter / X Card Generator
Generate Twitter / X Card meta tags with live preview of Summary and Large Image social cards.
Robots.txt Generator
Build and download customized robots.txt files with crawl directives, exclusions, and sitemap references.
XML Sitemap Generator
Create standard Google-compliant XML sitemaps (sitemap.xml) from lists of URLs with priority and change frequencies.
Schema Markup Generator
Generate rich Schema.org JSON-LD structured data for Organizations, Articles, Local Businesses, and Products.
FAQ Schema Generator
Create Google-compliant FAQPage JSON-LD structured data markup to qualify for rich FAQ snippets in SERPs.
Breadcrumb Schema Generator
Build BreadcrumbList JSON-LD structured data to display hierarchical navigation breadcrumbs in Google search.
Canonical URL Generator
Generate rel="canonical" link tags and HTTP headers to consolidate ranking equity and avoid duplicate penalties.
UTM Campaign Builder
Construct clean Google Analytics campaign URLs with UTM parameters (source, medium, campaign, term, content).
Google SERP Preview
Simulate how your meta titles, descriptions, and URLs render on Google Desktop and Mobile search results.
HTTP Status Code Lookup
Search and understand all HTTP status codes (100–599) with server headers, definitions, and SEO ranking impacts.
Heading Structure Checker
Analyze H1–H6 heading hierarchies, detect missing or multiple H1 tags, and visualize content outlines.
Image Alt Text Checker
Audit HTML image tags for missing or weak alt text attributes to optimize Google Images SEO and WCAG accessibility.
Keyword Extractor
Extract the most relevant keywords, bigrams, and topical phrases from any article or blog post.
Readability Checker
Score text readability using Flesch Reading Ease, Flesch-Kincaid Grade Level, and Gunning Fog metrics.
Lorem Ipsum Generator
Generate customizable placeholder text by words, sentences, or paragraphs with optional HTML tags.
Text Case Converter
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and kebab-case.
QR Code Generator
Generate high-resolution QR codes for URLs, WiFi, WhatsApp, and vCards with instant PNG/SVG download.
Password Generator
Generate cryptographically secure passwords and passphrases with entropy strength measurements.
Percentage Change Calculator
Calculate percentage change, absolute increase or decrease, multiplier factor, and step-by-step breakdown between two values.
Date Difference Calculator
Calculate exact days, weeks, months, years, and business days between two dates with leap year precision.
Grade Calculator
Calculate weighted course grades, semester averages, and what score you need on your final exam to pass or get an A.
Markup Calculator
Calculate markup percentage, selling price, gross profit margin, and keystone pricing from wholesale cost.
Commission Calculator
Calculate sales commission earnings, total compensation with base salary, and net retained revenue with tiered rates.
Character Counter
Count characters with and without spaces, words, sentences, reading time, and social media platform limit meters.
Remove Duplicate Lines
Remove duplicate lines from text, lists, and CSVs with case sensitivity, trimming, and sorting options.
Barcode Generator
Generate standard 1D barcodes including CODE128, EAN-13, UPC-A, and CODE39 with SVG and PNG downloads.
Invoice Generator
Create clean, professional printable invoices with customizable line items, tax, discount, notes, and PDF print support.
JPG to PNG Converter
Convert JPG and JPEG images to lossless PNG format in your browser with transparency preservation.
PNG to JPG Converter
Convert PNG images to JPG/JPEG with customizable background fill color for transparent areas and quality slider.
Why Choose Vectoolz In-Browser Tools?
Fast, exact calculations and utilities running locally inside your browser with maximum privacy.
100% Free Forever
Every tool and calculator is completely free without limits, paywalls, or hidden subscription costs.
Zero Server Uploads
Your files, images, code, and calculation inputs never leave your device. 100% client-side privacy.
Instant Processing
High-precision algorithms execute locally on your processor without network latency or lag.
No Account or Signup
Instant access to all tools anytime. No passwords, emails, or personal information required.
Frequently Asked Questions
Everything you need to know about our tools, calculators, accuracy standards, and privacy guarantee.