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Tools by nbsumittools.nbsumit.com
37 Free, Browser-Based Online Utilities

Simple tools for everyday tasks.

Fast, free, privacy-friendly tools that work directly in your browser. No server storage, no accounts, and no unnecessary friction.

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Browse our complete collection of browser-based utilities

Calculators Popular

Percentage Calculator

Calculate what X% of Y is, find percentage proportions, and calculate percentage differences.

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Calculators

Percentage Increase & Decrease Calculator

Compute percentage growth, reduction, markup, and discount between starting and final values.

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Calculators

Discount Calculator

Calculate final prices, savings, stacked double discounts, and sales tax.

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Calculators

Average Calculator

Calculate mean, median, mode, range, geometric mean, and sum from any set of numbers.

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Calculators

Ratio Calculator

Simplify ratios, scale proportions, and solve for missing values in A:B = C:D equations.

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Calculators

Age Calculator

Find your exact age in years, months, days, hours, and minutes with birthday countdown.

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Calculators

Date Difference Calculator

Calculate the number of days, weeks, months, years, and business days between two dates.

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Calculators

Time Duration Calculator

Calculate elapsed hours, minutes, and seconds between two clock times with midnight handling.

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Calculators

GST Calculator

Calculate Goods and Services Tax (GST) inclusive or exclusive prices with CGST & SGST breakdown.

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Calculators

Tip Calculator & Bill Splitter

Calculate restaurant tips, total bill with gratuity, and split amounts per person.

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Text Tools Popular

Word Counter & Text Analyzer

Count words, characters, sentences, paragraphs, and estimate reading/speaking time in real time.

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Text Tools

Character Counter & Frequency Analyzer

Count total characters, letters, digits, spaces, and view character frequency distribution.

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Text Tools

Case Converter

Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, and kebab-case.

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Text Tools

Remove Duplicate Lines

Deduplicate text lines, list items, and email lists with case-sensitivity control.

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Text Tools

Text & Line Sorter

Sort lines alphabetically (A-Z, Z-A), by character length, naturally, or reverse order.

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Text Tools

Text Reverser

Reverse characters, words, lines, or generate upside-down flipped text.

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Text Tools

Whitespace Cleaner & Formatter

Remove extra spaces, trim leading/trailing whitespace, delete blank lines, and convert tabs to spaces.

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Developer & Data Tools Popular

JSON Formatter & Validator

Format, validate, beautify, and inspect JSON with clear syntax error diagnostics.

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Developer & Data Tools

JSON Minifier & Compressor

Compress and minify JSON data by stripping whitespace and newlines with size reduction metrics.

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Developer & Data Tools

Base64 Encoder & Decoder

Encode and decode Base64 strings safely with full UTF-8 and multi-byte character support.

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Developer & Data Tools

URL Encoder & Decoder

Encode and decode URLs and query strings, with interactive query parameter parsing.

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Developer & Data Tools

UUID / GUID Generator (v4)

Generate cryptographically secure Version 4 UUIDs / GUIDs in bulk with custom formatting.

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Developer & Data Tools

Hash Generator (SHA-256, SHA-512, SHA-1)

Compute cryptographic hashes (SHA-256, SHA-512, SHA-384, SHA-1) using Web Crypto.

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Unit Converters

Length & Distance Converter

Convert between meters, feet, inches, centimeters, kilometers, miles, and yards.

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Unit Converters

Weight & Mass Converter

Convert between kilograms, pounds, ounces, grams, milligrams, stones, and tonnes.

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Unit Converters

Temperature Converter

Convert between Celsius (°C), Fahrenheit (°F), Kelvin (K), and Rankine (°R) with step formulas.

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Unit Converters

Speed & Velocity Converter

Convert between km/h, mph, meters per second, knots, and feet per second.

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Developer & Data Tools Popular

Advanced QR Code Generator

Generate custom QR codes for URLs, text, Wi-Fi, email, phone, SMS, and contacts with SVG & PNG download.

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Developer & Data Tools Popular

Favicon Generator & HTML Snippet Maker

Generate all standard website favicon sizes, Apple touch icons, and HTML meta tags from any image.

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Text Tools Popular

Resume Builder (ATS-Friendly CV Maker)

Build professional, ATS-friendly resumes with live A4 preview, multiple templates, JSON backup, and print/PDF export.

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Text Tools

Cover Letter Builder & Generator

Write customized, structured cover letters with professional tone variations, live formatted preview, and PDF export.

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Text Tools

Lorem Ipsum Generator

Generate placeholder dummy text by paragraph, sentence, or word count with optional HTML markup.

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Developer & Data Tools Popular

Secure Password Generator (CSPRNG)

Generate strong, cryptographically secure random passwords with entropy scoring and character filtering.

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Unit Converters

Color Converter (HEX, RGB, HSL, HSV)

Convert colors between HEX, RGB, HSL, and HSV with live palette preview and visual color picker.

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Developer & Data Tools Popular

Client-Side Image Resizer

Resize PNG, JPEG, and WebP images directly in your browser with aspect ratio locking and quality control.

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Developer & Data Tools Popular

Client-Side Image Compressor

Compress JPEG, PNG, and WebP images locally in your browser to reduce file sizes without server uploads.

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Developer & Data Tools

Markdown to HTML Converter & Previewer

Convert Markdown to clean, sanitized HTML with live rendered preview, code blocks, tables, and download.

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Privacy-Friendly by Design

Your tool input is processed locally in your browser and is not sent to our servers.

Calculations, text operations, conversions, and cryptographic digests run in client-side memory using standard browser APIs.

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