Welcome to the Network Ustad toolbox: sixty genuinely useful online tools that run entirely in your browser. There is nothing to install and no account to create, and because every calculation happens on your own device, your text, images and data are never uploaded to a server. The tools are grouped into six families below: SEO and content helpers for writers and marketers, text utilities for cleaning and reshaping words, developer tools for code and data, image and design tools, everyday calculators, and converters for files and units. Pick any tool to open its page, where you will find the working tool together with a complete guide, tips and answers to common questions.
SEO & Content Tools
- Word Counter – count words, characters, sentences and reading time in any text
- Character Counter – count characters with spaces, without spaces and letters only
- Keyword Density Checker – measure how often keywords and phrases appear in your content
- Meta Tag Generator – create ready-to-paste HTML meta tags for any web page
- Meta Title & Description Length Checker – check title and description lengths with a live SERP preview
- Slug Generator – turn page titles into clean, SEO-friendly URL slugs
- Robots.txt Generator – build a valid robots.txt file with crawler rules and sitemap
- Schema Markup Generator – create valid JSON-LD structured data for rich search results
- UTM URL Builder – create correctly formatted UTM campaign tracking links
- Readability Checker – score your writing with Flesch reading ease and grade levels
Text Tools
- Case Converter – switch text between uppercase, lowercase, title case and more
- Remove Duplicate Lines – delete repeated lines from lists and text while keeping order
- Sort Text Lines A–Z – arrange lines of text alphabetically, numerically or randomly
- Find and Replace Tool – replace words and phrases across a whole document at once
- Reverse Text Tool – flip text backwards by character, word or line order
- Remove Extra Spaces – strip double spaces, stray tabs and messy blank lines from text
- Word Frequency Counter – count how often every word appears in a text, with percentages
- Lorem Ipsum Generator – generate classic placeholder text by paragraph, sentence or word
- Text to Binary Converter – translate plain text into 8-bit binary code, character by character
- Binary to Text Converter – decode 8-bit binary code back into readable text
Developer Tools
- JSON Formatter & Validator – beautify, validate and minify JSON with precise error locations
- Base64 Encoder / Decoder – encode text to Base64 or decode Base64 strings back to text
- URL Encoder / Decoder – percent-encode URLs safely or decode encoded links back to text
- HTML Encoder / Decoder – convert special characters to HTML entities and back again
- CSS Minifier – compress CSS by removing comments and whitespace safely
- JavaScript Minifier – compress JavaScript by removing comments and extra whitespace
- HTML Minifier – compress HTML by collapsing whitespace and removing comments
- UUID Generator – create random version 4 UUIDs singly or in bulk batches
- Unix Timestamp Converter – convert epoch timestamps to dates and dates back to timestamps
- JWT Decoder – inspect a JSON Web Token’s header, claims and expiry date
Image & Design Tools
- Image Compressor – shrink JPG and PNG file sizes while keeping images looking sharp
- Image Resizer – resize images to exact pixel dimensions with aspect lock and presets
- PNG to JPG Converter – convert PNG images to compact JPG files with quality control
- JPG to PNG Converter – convert JPG photos into lossless PNG files for editing and design
- Image to Base64 Converter – turn image files into Base64 data URIs for CSS, HTML and JSON
- QR Code Generator – create QR codes for links, text and Wi-Fi details, ready to print
- Favicon Generator – create a favicon from letters or a logo, with install code included
- CSS Gradient Generator – design linear and radial CSS gradients and copy the code
- CSS Box Shadow Generator – design soft, realistic CSS box shadows with sliders and presets
- Hex / RGB Color Converter – convert colours between HEX, RGB and HSL with a visual picker
Calculators
- Age Calculator – work out an exact age in years, months, days and total days lived
- Percentage Calculator – work out percentages, percentage change and discounts in one place
- EMI Calculator – calculate monthly loan payments with total interest breakdown
- BMI Calculator – calculate Body Mass Index and see the healthy range for your height
- Date Difference Calculator – count the days, weeks and months between any two dates
- Tip Calculator – calculate restaurant tips and split bills evenly between people
- Random Number Generator – generate random numbers in any range, with or without duplicates
- Strong Password Generator – create strong random passwords with length and symbol options
- Online Stopwatch – time anything precisely with lap and split recording
- Countdown Timer – count down any duration with a clear end-of-time alarm
Converters & Utilities
- CSV to JSON Converter – turn CSV spreadsheet data into a clean JSON array of objects
- JSON to CSV Converter – turn a JSON array into a clean CSV file for spreadsheets
- XML Formatter – beautify and validate XML with clean, consistent indentation
- Markdown Editor & Preview – write Markdown with a live rendered preview side by side
- Unit Converter – convert length, weight, temperature, volume, area, speed and data
- Text to Speech – have any text read aloud with voice, speed and pitch controls
- Typing Speed Test – measure your typing speed in WPM with an accuracy score
- YouTube Thumbnail Downloader – download a YouTube video’s thumbnail in HD, SD and small sizes
- Browser Info Tool – see your browser version, operating system, screen and settings
- Screen Resolution Checker – display your screen resolution, viewport and pixel ratio live
Why These Tools Are Different
Most tool sites send everything you paste to their servers. Ours do the work locally with JavaScript, which makes them faster (no waiting for uploads) and private by design: drafts, customer lists, API payloads and personal photos never leave your device. Each tool page also carries a proper written guide, so you can learn what the numbers mean instead of just copying a result. If a tool saves you time, bookmark it; the collection grows and every tool stays free.