102 Free Online Tools & Calculators
The ultimate collection of free online tools — PDF tools, calculators, text tools, developer tools, SEO tools, image editors, converters, and more. All processed in your browser. No sign-up, no uploads, 100% private.
Calculators
8 free online calculators for finance, health, math, and everyday use
Age Calculator
Calculate exact age in years, months, days. Zodiac sign, birthday countdown, and day born.
Loan / EMI Calculator
Calculate monthly EMI, total interest, and amortization schedule for any loan.
Salary / Tax Calculator
Calculate take-home pay after tax. Supports UK, USA, Canada, Australia, India tax brackets.
BMI Calculator
Calculate Body Mass Index with visual gauge. Metric and imperial units supported.
Percentage Calculator
Five modes: percentage of number, what percent, increase/decrease, and difference.
Currency Converter
Convert between 34+ world currencies instantly with live exchange rates.
Time & Date Calculator
Calculate date differences, add/subtract time, and convert between time zones.
Profit / Margin Calculator
Calculate profit margin, markup percentage, and selling price from desired margin.
Image Tools
6 free online image editing tools — 100% client-side, nothing uploaded to any server
Background Remover
Remove image backgrounds instantly. Transparent PNG output with clean edges.
Image Compressor
Reduce image file size without losing quality. Batch compression with JPEG, PNG, WebP.
Image Resizer
Resize images to any dimension. Social media presets and custom sizes.
JPG ⇄ PNG Converter
Convert between JPG, PNG, and WebP formats. Batch conversion with quality control.
Photo Enhancer / AI Upscale
Enhance photos with AI-powered adjustments. One-click presets and 2x/4x upscaling.
Passport Photo Maker
Create passport and ID photos for any country. Print-ready 4x6 sheet at 300 DPI.
PDF Tools
10 free online PDF tools — compress, merge, split, convert, and edit PDFs in your browser
PDF Compressor
Reduce PDF file size online. Compress PDFs for email, web, or storage while maintaining quality.
PDF Merger
Combine multiple PDF files into one document. Drag to reorder pages before merging.
PDF Splitter
Split PDF into multiple files. Extract specific pages or split by page range.
PDF to Image Converter
Convert PDF pages to high-quality JPG or PNG images. Download individually or as ZIP.
Image to PDF Converter
Convert JPG, PNG, or other images to PDF. Combine multiple images into one PDF document.
Rotate PDF
Rotate PDF pages 90°, 180°, or 270°. Rotate all pages or select specific ones.
PDF Page Remover
Delete unwanted pages from PDF documents. Select and remove multiple pages at once.
PDF to Word Converter
Convert PDF documents to editable Word format. Extract text and formatting from PDFs.
Word to PDF Converter
Convert Word documents to PDF format. Preserve formatting and layout in the conversion.
PDF Password Protector
Add password protection to your PDF files. Secure documents with encryption.
Security & Developer Tools
5 free online security tools — passwords, hashes, and breach checking
Password Generator
Generate strong, secure passwords with custom length, character sets, and batch generation.
Password Strength Checker
Test password security with entropy calculation and crack time estimates.
Hash Generator (MD5, SHA)
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text or files.
Random String Generator
Generate random strings, UUIDs, hex codes, Base64 tokens, and more.
Email Breach Checker
Check if your password has been exposed in data breaches via HIBP API.
Text Tools
12 free online text manipulation, conversion, and analysis tools
Word Counter
Count words, characters, sentences, paragraphs with reading and speaking time.
Character Counter
Count characters with optional limit, progress bar, and byte size display.
Text Case Converter
13 case conversions: UPPER, lower, Title, camelCase, snake_case, and more.
Lorem Ipsum Generator
Generate placeholder text in paragraphs, sentences, or words.
Text to Speech
Convert text to speech with voice selection, rate, and pitch controls.
Find & Replace Text
Find and replace text with regex support, case sensitivity, and whole word matching.
Remove Duplicate Lines
Remove duplicate lines with sorting and trimming options.
Text Diff / Compare
Compare two texts side by side with highlighted additions and deletions.
Reverse Text Generator
Reverse characters, words, lines, or flip text upside down.
Slug Generator
Generate URL-friendly slugs with custom separators and transliteration.
Morse Code Translator
Translate text to Morse code and back. Play Morse audio with beeps.
Binary to Text Converter
Convert between text and binary, hex, and octal representations.
Developer Tools
10 free online developer tools for code formatting, encoding, and testing
JSON Formatter / Validator
Format, beautify, minify, and validate JSON with syntax highlighting.
HTML Beautifier / Minifier
Beautify or minify HTML code with configurable indentation.
CSS Minifier / Beautifier
Minify or beautify CSS with size reduction statistics.
JavaScript Minifier
Minify JavaScript by removing comments and whitespace. Size stats included.
Base64 Encoder / Decoder
Encode and decode Base64 text and files with drag & drop support.
URL Encoder / Decoder
Encode/decode URLs with component breakdown and query parameter parsing.
HTML Entity Encoder
Encode and decode HTML entities. Special characters and numeric entities.
Color Picker & Converter
Pick colors and convert between HEX, RGB, HSL, CMYK with harmony suggestions.
Regex Tester
Test regular expressions with real-time highlighting and capture groups.
Cron Expression Generator
Build cron expressions visually with human-readable descriptions and next run times.
SEO Tools
8 free online SEO tools for meta tags, schema markup, and search optimization
Meta Tag Generator
Generate HTML meta tags for title, description, keywords, robots, and canonical URL.
Open Graph Generator
Generate Open Graph and Twitter Card meta tags with live preview.
Robots.txt Generator
Generate robots.txt with user-agent rules, allow/disallow paths, and sitemap.
Sitemap Generator
Generate XML sitemaps with URLs, priorities, and change frequencies.
Google SERP Preview
Preview how your page appears in Google search results. Desktop and mobile views.
Keyword Density Checker
Analyze keyword density with 1, 2, and 3-word phrase analysis.
Heading Tag Checker
Extract and analyze H1-H6 heading hierarchy. Detect SEO issues.
Schema Markup Generator
Generate JSON-LD schema for Organization, Product, FAQ, Article, and more.
Math & Science Tools
8 free online math calculators and scientific tools
Scientific Calculator
Full scientific calculator with sin, cos, tan, log, ln, sqrt, power, factorial, and memory.
Unit Converter
Convert length, weight, temperature, speed, area, volume, data, and time units.
Fraction Calculator
Add, subtract, multiply, divide fractions with step-by-step solutions.
GPA Calculator
Calculate GPA on 4.0 scale. US, UK, and India grading systems supported.
Compound Interest Calculator
Calculate compound interest with monthly contributions and year-by-year breakdown.
Tip Calculator
Calculate tip amount and split bill among multiple people.
Discount Calculator
Calculate discounts, stacked discounts, tax, and reverse price calculations.
Average Calculator
Calculate mean, median, mode, range, standard deviation, and variance.
Instagram Bio Generator
Generate creative Instagram bios with emoji suggestions and character counter.
Twitter/X Character Counter
Count characters for Twitter/X posts with 280-char limit and URL detection.
YouTube Thumbnail Downloader
Download YouTube video thumbnails in all available sizes.
Social Media Image Size Guide
Complete reference for optimal image sizes across all social media platforms.
Hashtag Generator
Generate relevant hashtags for your content across popular, niche, and branded categories.
Facebook Post Preview
Preview how your post will look on Facebook with link preview mockup.
LinkedIn Post Preview
Preview your LinkedIn post with character counter and link preview.
Conversion Tools
10 free online unit converters for temperature, length, weight, speed, and more
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin, and Rankine with formulas.
Length / Distance Converter
Convert between mm, cm, m, km, inches, feet, yards, miles, and more.
Weight / Mass Converter
Convert between mg, g, kg, tonnes, ounces, pounds, and stones.
Speed Converter
Convert between m/s, km/h, mph, knots, ft/s, and Mach.
Area Converter
Convert between sq meters, sq feet, acres, hectares, and more.
Volume Converter
Convert between ml, liters, gallons, cups, and cubic units.
Data Storage Converter
Convert between bits, bytes, KB, MB, GB, TB, PB with binary units.
Number System Converter
Convert between binary, octal, decimal, and hexadecimal number systems.
Roman Numeral Converter
Convert between Roman numerals and decimal numbers (1-3999).
Timezone Converter
Convert times between 37+ world timezones with live world clock.
Writing & Content Tools
8 free online writing tools for grammar, readability, and content analysis
Grammar Checker
Check for common grammar issues, misspellings, and repeated words.
Readability Score
Calculate Flesch Reading Ease, Kincaid Grade Level, and 4 more readability formulas.
Plagiarism Checker
Compare two texts for similarity with matching phrase detection.
Article Rewriter
Rewrite text using synonym replacement with light, medium, and heavy modes.
Title Case Converter
Convert text to title case in AP, Chicago, APA, MLA, and simple styles.
Essay Word Counter
Count words with target tracking, top keywords, and sentence analysis.
Citation Generator
Generate citations in APA, MLA, Chicago, and Harvard formats.
Headline Analyzer
Score headlines out of 100 based on power words, emotion, and word balance.
Finance Tools
6 free online finance calculators for investments, tax, and invoicing
SIP Calculator
Calculate Systematic Investment Plan returns with year-by-year growth chart.
FD Calculator
Calculate Fixed Deposit maturity amount with different compounding frequencies.
GST Calculator
Calculate GST inclusive/exclusive with CGST, SGST, IGST split and bulk mode.
VAT Calculator
Add or remove VAT with 27 country presets and custom rates.
Invoice Generator
Create professional invoices with line items, tax, and print/PDF export.
Retirement Calculator
Plan retirement with savings projections, inflation adjustment, and income estimates.
Utility Tools
8 free online utility tools for QR codes, barcodes, timers, and more
QR Code Generator
Generate QR codes for URLs, text, email, phone, WiFi, and vCards with color customization.
Barcode Generator
Generate Code 128, Code 39, EAN-13, EAN-8, and UPC-A barcodes.
IP Address Lookup
Find your IP address with city, country, ISP, timezone, and map location.
User Agent Parser
Parse user agent strings to detect browser, OS, device type, and engine.
Screen Resolution Checker
Check your screen resolution, viewport, pixel ratio, and color depth.
Internet Speed Test
Test your download speed and latency with a simple browser-based test.
Countdown Timer & Stopwatch
Countdown timer with alarm and stopwatch with lap times.
Pomodoro Timer
Pomodoro technique timer with customizable work/break durations and session tracking.
Health & Fitness Tools
6 free online health calculators for calories, hydration, and body composition
Calorie Calculator
Calculate BMR, TDEE, and daily calories for weight loss, maintenance, or gain with macros.
Water Intake Calculator
Calculate recommended daily water intake with hourly drinking schedule.
Pregnancy Due Date Calculator
Calculate estimated due date with pregnancy timeline and milestones.
Heart Rate Zone Calculator
Calculate max heart rate and target zones for fat burn, cardio, and peak training.
Body Fat Calculator
Calculate body fat percentage using US Navy method and BMI-based estimate.
Ideal Weight Calculator
Calculate ideal weight using Devine, Robinson, Miller, and Hamwi formulas.
102 Free Online Tools by BlueOrbit Solutions
Welcome to the ultimate collection of 102 free online tools organized across 14 categories. Whether you need to compress PDF, merge PDF files, convert PDF to image, count words, format JSON, generate QR codes, calculate calories, create invoices, or check SEO — we have you covered. Every tool runs entirely in your browser with no sign-up, no uploads, and complete privacy.
Why Use Our Free Online Tools?
- 100% free with no registration or sign-up required
- Works on any device — mobile, tablet, and desktop responsive
- Instant results processed entirely in your browser
- Complete privacy — your data never leaves your device
- No ads or popups — clean, professional interface
- 102 tools across 14 categories for every need
Tool Categories
Calculators (8): Age, Loan/EMI, Salary/Tax, BMI, Percentage, Currency, Time/Date, and Profit/Margin calculators for finance, health, and everyday math.
Image Tools (6): Background Remover, Image Compressor, Resizer, JPG/PNG Converter, Photo Enhancer with AI Upscale, and Passport Photo Maker — all client-side.
PDF Tools (10): PDF Compressor, PDF Merger, PDF Splitter, PDF to Image Converter, Image to PDF, Rotate PDF, PDF Page Remover, PDF to Word, Word to PDF, and PDF Password Protector — compress, merge, split, and convert PDFs entirely in your browser.
Security Tools (5): Password Generator, Strength Checker, Hash Generator (MD5/SHA), Random String Generator, and Email Breach Checker via HIBP.
Text Tools (12): Word Counter, Character Counter, Case Converter, Lorem Ipsum Generator, Text to Speech, Find & Replace, Duplicate Remover, Text Diff, Reverse Text, Slug Generator, Morse Code Translator, and Binary Converter.
Developer Tools (10): JSON Formatter, HTML/CSS/JS Minifier, Base64 Encoder, URL Encoder, HTML Entity Encoder, Color Picker, Regex Tester, and Cron Generator.
SEO Tools (8): Meta Tag Generator, Open Graph Generator, Robots.txt Generator, Sitemap Generator, SERP Preview, Keyword Density Checker, Heading Checker, and Schema Markup Generator.
Math & Science (8): Scientific Calculator, Unit Converter, Fraction Calculator, GPA Calculator, Compound Interest, Tip Calculator, Discount Calculator, and Average/Statistics Calculator.
Social Media (7): Instagram Bio Generator, Twitter Character Counter, YouTube Thumbnail Downloader, Image Size Guide, Hashtag Generator, Facebook and LinkedIn Post Previews.
Conversion Tools (10): Temperature, Length, Weight, Speed, Area, Volume, Data Storage, Number System, Roman Numeral, and Timezone converters.
Writing Tools (8): Grammar Checker, Readability Score, Plagiarism Checker, Article Rewriter, Title Case Converter, Essay Word Counter, Citation Generator, and Headline Analyzer.
Finance Tools (6): SIP Calculator, FD Calculator, GST Calculator, VAT Calculator, Invoice Generator, and Retirement Calculator.
Utility Tools (8): QR Code Generator, Barcode Generator, IP Address Lookup, User Agent Parser, Screen Resolution Checker, Internet Speed Test, Countdown Timer, and Pomodoro Timer.
Health & Fitness (6): Calorie Calculator, Water Intake Calculator, Pregnancy Due Date Calculator, Heart Rate Zone Calculator, Body Fat Calculator, and Ideal Weight Calculator.
Built by BlueOrbit Solutions
These free tools are built and maintained by BlueOrbit Solutions, a software development company based in Manchester, UK. We specialise in custom web development, mobile app development, AI automation, and cloud solutions. If you need a custom tool built for your business, get in touch with us.
Social Media Tools
7 free online social media tools for content creation and optimization