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Tools Star Hub

Tools Star Hub

Free Digital Tools

Convert PDFs, compress images, count or rewrite text, and calculate. Free to use, with no account.

For freelancers, students, digital marketers and news writers

Most valuable tools:Urdu News TranslatorAI Text HumanizerPDF to JPGPDF CompressorImage CompressorWord CounterQR Code GeneratorUTM Builder
  • Free to use
  • No sign-up required
  • Fast and easy
  • Files stay in your browser

Everything you need, in one place.

Filter the tools that are already on this site. Each one opens in the browser.

Percentage Change Calculator

Compare an original number with a new one and see the percent change. From 80 to 100 is a 25% rise; 100 back to 80 is a 20% drop. An original of 0 is rejected.

Calculators

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Discount Calculator

Take a percent off a price and see the amount saved and what you pay. Type plain numbers. A currency symbol is invalid, and a discount above 100% is rejected.

Calculators

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Popular

Age Calculator

Count years, months, and days from a birth date to today or a later date. An earlier date is rejected. Leap days follow the calendar, not a 365-day year.

Calculators

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Word Counter

Count words, characters, sentences and estimate reading time in your browser.

Text Tools

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Character Counter

Count characters, words, and lines as you type, and a total without spaces. One emoji counts as one Unicode character. Sentences are not split on this page.

Text Tools

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Case Converter

Convert text to uppercase, lowercase, title case, camelCase and more in your browser.

Text Tools

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Lorem Ipsum Generator

Generate placeholder paragraphs, sentences, or words from Latin. It starts with the classic opening. Limits are 20 paragraphs, 50 sentences, or 500 words.

Text Tools

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JSON Formatter

Pretty-print JSON, minify it, or check that it parses in the page. Comments, trailing commas, and single quotes fail. It does not turn the result into CSV.

Developer Tools

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Image Resizer

Resize images in your browser. Set width and height, lock aspect ratio, then download.

Image Tools

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Image Cropper

Drag a box over a JPG, PNG, or WebP and download the pixels inside that box. Frames are free, 1:1, 4:3, or 16:9. Rotation and filters are not on this page.

Image Tools

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Image Converter

Convert JPG to PNG or PNG to JPG in your browser, including a background color for transparency.

Image Tools

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Base64 Encoder

Encode text to Base64 or decode it back, using UTF-8. Anyone can decode the result, so it is not a way to hide a password. A file drop is not accepted.

Developer Tools

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UUID Generator

Generate one or many UUID v4 values in your browser using a secure random source.

Developer Tools

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URL Encoder

Encode or decode URL components in your browser with encodeURIComponent.

Developer Tools

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UTM Builder

Add utm_source, utm_medium, and utm_campaign to a link. Term and content are optional. Blank fields are omitted, and this page does not record a visit.

SEO & Utilities

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Unit Converter

Convert length, weight, or temperature between units as you type. Currency, area, and volume are not included. A temperature below absolute zero is rejected.

Calculators

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Slug Generator

Turn a title into a lowercase, hyphenated permalink. Latin accents are removed, while letters such as 你好 stay. It does not check that the address is unused.

SEO & Utilities

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PDF to JPG

Convert PDF pages to JPG images in your browser. Choose the first page, selected pages, or all pages.

Image Tools

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Hex to RGB

Convert 3-digit, 6-digit and 8-digit hex colors to RGB, RGBA and HSL in your browser.

Developer Tools

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Color Picker

Pick a color with the browser color input and copy HEX, RGB or HSL values.

Image Tools

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QR Code Scanner

Scan a QR code with your camera or an uploaded image. Processing stays in your browser.

SEO & Utilities

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HTML Minifier

Minify HTML in your browser with a conservative pass that keeps pre, textarea, script and style content.

Developer Tools

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CSS Minifier

Minify CSS in your browser while preserving strings, URLs, comments and important spacing.

Developer Tools

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Image to PDF

Turn up to 20 JPG or PNG images into one PDF, in the order you set. WebP is not accepted. Sides over 2,000 pixels are downsampled, and Fill can crop to cover.

Image Tools

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PDF Merger

Merge multiple PDF files in order and download the combined document locally.

Image Tools

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PDF Splitter

Copy chosen pages into a new PDF with ranges such as 1-3,6. The original file stays unchanged. A reversed range is rejected, and the copy holds up to 80 pages.

Image Tools

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PDF Compressor

Reduce PDF file size in your browser with rewrite or raster presets. Compression is not guaranteed.

Image Tools

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PDF to Text

Extract selectable text from a PDF in your browser. Scanned pages need OCR, which is not included.

Image Tools

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Image to Text

Read English text from one photo in your browser. The first run downloads the recognition files. A real photo can come back with wrong letters.

Image Tools

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Text to PDF

Turn plain text into a multi-page PDF in your browser, with wrapping, margins and optional page numbers.

Image Tools

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Word to PDF

Read the words from a .docx file and place them in a plain PDF. Images, tables as grids, and text styling are left out.

Image Tools

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Markdown to HTML

Convert Markdown to HTML source in your browser. Raw HTML is escaped and not executed.

Developer Tools

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HTML to Markdown

Convert HTML source into Markdown in your browser. Input is treated as text and is not executed.

Developer Tools

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Text Diff Checker

Compare original and modified text in your browser, with line or word differences and a readable summary.

Text Tools

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Line Sorter

Sort lines A–Z, numerically or by length in your browser, with optional trim, empty-line skip and dedupe.

Text Tools

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AI Prompt Generator

Build a structured prompt from a topic, goal, audience, and format. Generate prompt stays in the browser. Generate with AI sends the fields to Gemini.

AI Tools

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AI Article Detector

Review sentence length, repeated phrases, and vocabulary in a draft. This is pattern analysis, not a verdict on authorship.

AI Tools

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AI Article Compressor

Shorten a long draft in the browser, or send it to Gemini to compress it. Submitted text is not saved on this site.

AI Tools

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AI Text Humanizer

Rewrite stock phrases with a fixed list in the browser. Humanize with AI sends the draft to Gemini. Neither result is a way to hide how a draft was written.

AI Tools

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Tip Calculator

Split a bill by tip percentage and number of people, including the tip and the total per person.

Calculators

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Find and Replace

Replace the first match or every match in text you paste, with an optional case-sensitive search.

Text Tools

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JSON to CSV

Turn an array of JSON objects into CSV, including commas and quotes inside cells.

Developer Tools

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CSV to JSON

Turn CSV with a header row into JSON, including quoted commas and escaped quotes.

Developer Tools

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Regex Tester

Test a regular expression against sample text and see each match, its position, and its groups.

Developer Tools

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Hash Generator

Create a SHA-256, SHA-384, or SHA-512 digest of text in your browser. This is a hash, not encryption.

Developer Tools

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Loan Calculator

Estimate the monthly payment, interest, and payoff schedule for a fixed-rate installment loan, including a personal loan.

Calculators

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Mortgage Calculator

Estimate principal and interest, optional housing costs, a 15-year and 30-year comparison, and an extra-payment payoff.

Calculators

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Debt Payoff Calculator

Estimate how long several debts take to pay off, and the interest, under a highest-interest or smallest-balance plan.

Calculators

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Savings Goal Calculator

Estimate the regular contribution that reaches a savings target from what you have already saved and a rate you choose.

Calculators

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Hourly Wage Calculator

Convert an hourly rate and a weekly schedule into weekly, monthly, and annual pay, or turn a salary into an hourly rate.

Calculators

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GPA Calculator

Calculate a credit-weighted GPA from letter grades or grade points on a common 4.0 map.

Calculators

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Square Footage Calculator

Multiply each room length by its width, then add the rooms. Totals are in square feet and square meters. It measures rectangles, not closets or triangles.

Calculators

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URL Parser

Split an absolute URL into protocol, host, port, path, fragment, and query parameters.

SEO & Utilities

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JWT Decoder

Decode a JSON Web Token header and payload in your browser. The signature is not checked.

Developer Tools

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Time Calculator

Add or subtract hours and minutes, then read the total as hours, minutes, and total minutes.

Calculators

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Text Repeater

Repeat a word, phrase, or line a set number of times, with a space, a new line, or nothing between copies.

Text Tools

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Password Strength Checker

Estimate a typed password from the character types it uses. The password stays in this tab and is not checked against a breach list.

SEO & Utilities

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Favicon Generator

Draw a letter or a solid color as PNG icons at 16, 32, and 180 pixels, plus an ICO of the two smaller sizes.

Image Tools

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Meta Tag Generator

Write title, description, robots, canonical, Open Graph, and Twitter tags as HTML. No live page is fetched.

SEO & Utilities

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Open Graph Preview

Check a public page's title, description, image, and Twitter card. The URL is sent to this site. Private and local addresses are rejected.

SEO & Utilities

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YouTube Banner Maker

Design 2560 × 1440 YouTube channel art in your browser with 15 templates, text, logos, shapes, gradients, layers and a safe-area guide, then export PNG or JPG under 6 MB.

Image Tools

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Partial Pressure Calculator

Calculate partial pressures with Dalton's law from mole fractions, gas mixtures or the ideal gas law, add partial pressures to a total, and convert between atm, kPa, Pa, bar and mmHg.

Calculators

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Fantasy Point Calculator

Score cricket, football and basketball fantasy points from match stats with editable scoring rules saved in your browser and a line-by-line breakdown.

Calculators

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Graduation Calculator by Birthday

Estimate school start and graduation years from a date of birth with your own entry age, cutoff date, academic calendar and years of study, plus clear assumptions.

Calculators

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Unemployment Benefits Calculator

Estimate weekly unemployment benefits and the claim total for California, New York, Texas and Florida using each state's published formula, limits and sources.

Calculators

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Secret Santa Generator

Create a free Secret Santa gift exchange online. Add participants, generate random assignments, set exclusions, and organize your gift exchange without registration.

SEO & Utilities

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Urdu News Translator

Paste Urdu news and get Brief, Medium, and Full English drafts, with a fact check. An editor reviews the draft before it is published.

AI Tools

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CPS Test

Free CPS test (click speed test): click for 1 to 60 seconds, including the 10-second click test, and see your clicks per second, rating, and best score.

SEO & Utilities

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Browse by category

Calculators, text, developer utilities, images and PDFs, and website tools.

All categories

Calculators

34 tools

Everyday calculation tools

Browse tools

Text Tools

15 tools

Tools for writing and text processing

Browse tools

Developer Tools

23 tools

Format, encode, minify, and convert data in the browser

Browse tools

Image Tools

19 tools

Browser-based image and PDF tools

Browse tools

SEO & Utilities

13 tools

Links, slugs, QR codes, and passwords

Browse tools

AI Tools

7 tools

Prompt builders and writing tools, with optional Gemini AI

Browse tools

Why Tools Star Hub?

A straightforward set of utilities for work you would otherwise do in a separate app.

  • Fast

    Most tools run in the browser and return a result on the same page.

  • Free

    The tools on this site do not require payment.

  • Private

    Files and pasted text are processed on your device. Page visits are measured separately, as the privacy policy explains.

  • No account

    Open a tool and use it. An account is not required.

How it works

Three steps. No installer.

  1. 1

    Choose a tool

    Search or pick a calculator, file tool, or developer utility.

  2. 2

    Upload or enter your content

    Add the file, numbers, or text the tool asks for.

  3. 3

    Get your result

    Copy, download, or read the result on the same page.

Helpful Guides

Short explanations for tasks the tools on this site already handle.

All guides

Guide

How to Calculate Percentage

How to calculate a percentage: X% of a number, a number as a percent of another, and percent increase or decrease.

Read guide

Guide

How to Compress an Image Without Losing Quality

Resize a photo first, pick JPEG, WebP, or PNG, then compress in small steps while you compare a preview. The file stays in your browser.

Read guide

Guide

What Is JSON?

JSON is a text format for objects and arrays. See how to read it, why it fails to parse, and how to format it in the browser.

Read guide

Guide

How to Create a UTM URL

Add utm_source, utm_medium, and utm_campaign to a destination URL so analytics can tell campaigns apart.

Read guide

Pricing

The tools are free to use. There is no account, no installation, and no paid plan.

Frequently asked questions

What is Tools Star Hub?
Tools Star Hub is a free website with 111 online tools in 6 categories: calculators, text tools, developer tools, image and PDF tools, SEO utilities, and AI tools. It also has 144 step-by-step guides that explain the method behind the tools.
Is Tools Star Hub free to use?
Yes. Every tool is free. There is no signup, no account, and no payment system.
Are my files and text uploaded?
Most tools run in your browser, so files and pasted text stay on your device. The exceptions are the AI buttons on AI tools, which send the text you enter to Google's Gemini model, and the Open Graph preview, which sends the URL you enter to this site. Each tool page says how it handles input.
Do the tools work on a phone?
Yes. The pages are built for phone browsers as well as desktop. Large files can be slower on a phone because the work happens on the device.
Which languages is the site available in?
The site is available in English and 14 other languages, including Spanish, Portuguese, French, German, Arabic, Urdu, Hindi, Japanese, and Korean. Guides are written in English.
How do I report a wrong result or suggest a tool?
Email esd.shigri110@gmail.com or use the contact page. Include the tool name, what you entered, and what you expected to see.

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Explore Tools Star Hub's collection of simple online tools.

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What Tools Star Hub is

Tools Star Hub is an independent website run by Ali Ahmed. It is a free collection of 111 online tools in 6 categories, plus 144 short guides that explain the method behind a task. You can open a calculator, a text tool, a developer utility, an image or PDF tool, a link or QR tool, or an AI writing helper, use it, and leave. There is no account and no paid plan.

Most tools run in the browser. A PDF, an image, or text you paste stays on this device and is not uploaded to our server. Two exceptions are labeled on their pages. The AI buttons send the text you submit to Google's Gemini model and return text. They do not return an image or a video file. The Open Graph preview sends the URL you type to this site, which reads the public page's title and share tags and does not save that page.

Each tool page states its own limits: a size cap, a format it rejects, or a result that is only an estimate, such as a loan payment or a reading time. Guides sit next to the tools and walk through the same arithmetic or file steps in plain language. Questions can go to esd.shigri110@gmail.com or the contact page. The about page says who runs the site and how input is handled.