Free online tools that work right in your browser
61 single-purpose tools for developers, writers, designers, students and anyone with a quick job to do — formatters, converters, calculators, generators and world data tables. No account, no download.
Developer Tools 11 tools
Formatters, decoders, generators and references for everyday coding work.
API Tester
Send GET, POST, PUT, PATCH or DELETE requests from your browser and inspect status, headers and JSON.
JWT Decoder
Decode a JWT's header, payload claims and signature locally and see whether its exp time has passed.
Code Formatter
Beautify or minify HTML, CSS, JavaScript and SQL snippets with two-space indentation in your browser.
SQL Formatter
Format SQL with one clause per line, upper-case keywords and highlighting, or minify it to one line.
Diff Checker
Compare two texts line by line and see added and removed lines with line numbers and counts.
HTTP Status Codes
Look up 19 common HTTP status codes with plain-English meanings, typical causes and RFC 9110 references.
CSS Generators
Build Flexbox and Grid layouts or keyframe animations with visual controls and copy the generated CSS.
Fake Data Generator
Generate fictional names, emails, phones, addresses and more, then export them as a table, JSON or CSV.
Lorem Ipsum Generator
Generate Lorem Ipsum, Chinese or random English placeholder paragraphs, with optional HTML <p> tags.
Keyboard Shortcuts
Search 264 default shortcuts for Windows, macOS, VS Code, Chrome, Photoshop and Excel, grouped by task.
Number Base Converter
Convert integers between binary, octal, decimal and hex as you type, with exact BigInt math and a bit view.
Web, SEO & Marketing 9 tools
Check websites, inspect pages and prepare links and images for sharing.
Web Page Tools
Extract links from HTML or a URL, audit headings and meta tags, and render HTML to a PNG or JPG image.
Website Status Checker
Check if a website is up: HTTP status code, response time and final URL, for one address or a list.
Tech Stack Detector
Detect a site's server, CDN, CMS, JavaScript framework and analytics tags from its headers and HTML.
IP Address Lookup
Show your public IP or look up any IPv4/IPv6 address: approximate location, ISP and time zone.
Open Graph Preview
Draft Open Graph and Twitter Card tags, preview approximate link cards and copy the ready-made HTML.
UTM Link Builder
Add utm_source, medium, campaign, term and content to any URL, with channel presets and saved links.
Social Media Image Sizes
Recommended pixel sizes and aspect ratios for profiles, covers, posts, stories and ads on 7 networks.
Browser Fingerprint Test
See what your browser exposes to scripts: user agent, screen, time zone, WebGL, canvas hash and more.
Screen Resolution Checker
Read your screen resolution, viewport, pixel ratio and color depth, plus a full-screen dead-pixel test.
Text & Encoding 5 tools
Transform, encode and practise with text.
Text Encryption
Encrypt text with a password using AES-256-GCM, or encode it with Base64, ROT13 or a Caesar shift.
Morse Code Translator
Translate text to Morse code and back, see the dots and dashes, and play it as audio at 5 to 30 WPM.
ASCII Art Generator
Turn short text into big ASCII-art letters in 3 fonts with custom fill characters; copy or save as .txt.
Emoji Search
Search about 490 common emojis by name or category and copy any one to your clipboard with a click.
Typing Speed Test
Timed 30, 60 or 120-second typing test on English or Chinese passages that scores speed and accuracy.
Design & Media 7 tools
Make charts, images, memes, QR cards, banners and audio in the browser.
Chart Maker
Type labels and values to draw a bar, line, pie or horizontal bar chart and save it as a PNG image.
Font Preview
Preview your own text in 60 Google Fonts, compare up to three side by side and copy the embed CSS.
Meme Generator
Add outlined top and bottom captions to your own photo or a gradient and download the meme as a PNG.
Placeholder Image Generator
Make placeholder images up to 4096 px with your own colours and label, as PNG, SVG or a data URL.
Speech to Text & Text to Speech
Dictate speech to text, hear text read aloud with your browser's voices, and watch live microphone sound levels.
LED Scrolling Banner
Full-screen scrolling LED-style text sign with custom colours, size and speed for phones and screens.
vCard QR Code Generator
Turn your contact details into a vCard QR code that phones scan to save you as a contact.
Calculators & Math 8 tools
Scientific, statistical, health, building and everyday calculators plus random tools.
Scientific Calculator
Evaluate expressions with trig, logs, roots, powers and factorials in DEG or RAD mode, with memory and history.
Everyday Calculators
Tip, discount, date difference, salary-to-hourly and inflation calculators with the formulas explained.
Probability Calculator
Exact nPr/nCr, dice-total, coin-flip (binomial) and lottery (hypergeometric) probabilities with formulas.
Matrix Calculator
Add, subtract, multiply, transpose, invert and find determinants of 2x2 to 4x4 matrices, with steps.
Random Number Generator
Random integers, dice, list picks, unique lottery numbers, coin flips and bulk lists via Web Crypto.
Random Name Picker
Draw names without repeats or split a list into balanced random teams, using the Web Crypto API.
Health Calculators
BMI, Navy body fat, Mifflin-St Jeor BMR, TDEE, due date and ideal weight estimates; not medical advice.
Construction Calculators
Estimate concrete, bricks, paint, floor tiles and roof tiles for a job, then total the material cost.
Money & Finance 4 tools
Compare loans, currencies and living costs and look up card numbers.
Loan Comparison Calculator
Compare two loans: monthly payment, total interest and a full amortization schedule for each.
Exchange Rate History
Latest ECB reference rate and 40-day chart for any pair of 11 major currencies, via Frankfurter.
Cost of Living Comparison
Compare estimated rent, food, transport and salaries in 30 cities and convert a salary between them.
BIN Lookup
Identify a card's likely network, issuer and country from its first 6-8 digits, locally in your browser.
Time & Date 3 tools
Timers, world clocks and historical dates.
Countdown Timer & Stopwatch
Up to five countdown timers, a lap stopwatch, a Pomodoro timer and day counters for saved dates.
World Time Zones
See current local times, UTC offsets and day/night for 50 cities, with a saved personal watchlist.
On This Day in History
Pick any date to see up to six historical events and three famous birthdays, filterable by category.
World Data & Reference 11 tools
Country statistics, rankings and reference tables with their sources and limits explained.
Country Data Explorer
Sort and chart GDP, population, area, density, HDI and GNI per capita for 30 countries.
World Population Data
Compare population, growth, density, urban share, age, life expectancy and fertility for 30 countries.
Country Codes Lookup
Find ISO alpha-2/alpha-3/numeric codes, calling codes, currencies and capitals for 89 countries.
Internet Users by Country
Compare internet users, penetration, mobile users and average speeds across 30 countries.
CO2 Emissions by Country
Compare total and per-capita CO2, global share and renewable share for 25 major emitters.
Food Production by Country
Compare rice, wheat, corn and soybean output and arable land for 20 producing countries.
EV Sales Data
Sortable 2024 EV sales by country and brand, with market share, growth rates and comparison charts.
Travel Destinations Ranking
Rank 25 countries by tourist arrivals, tourism revenue and spend per visitor, with comparison charts.
Programming Language Rankings
Compare 25 languages by TIOBE rating, GitHub share, Stack Overflow usage and US salary, plus a radar chart.
Periodic Table
Click any of the 118 elements for its atomic mass, electron configuration, melting and boiling points.
China Hospital Directory
Find major Class 3A hospitals in 23 Chinese cities, with international services and official site links.
Learning & Everyday 3 tools
Small daily helpers for vocabulary, reading and parcels.
Word of the Day
A new English word each day with pronunciation, meaning and example, plus a quiz and past-word calendar.
Random Wikipedia Article
Pull up a random English Wikipedia article summary, narrow it by topic, and save favorites locally.
Shipping Carrier Identifier
Guess a parcel's carrier from its tracking number format and open that carrier's official tracking page.
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What ToolHub is
ToolHub, at webhut.top, is a collection of 61 free web tools, each built to do one job: decode a JSON Web Token, compare two versions of a text, split a restaurant bill, turn a list of names into random teams, check whether a website is responding, or look up an ISO country code. The tools are grouped into nine categories, from developer utilities and calculators to design helpers and world data tables. Every tool has its own page, with the tool at the top and a short guide underneath that explains what it does, how to use it, how it works and where its limits are.
How the tools run
Most of ToolHub is plain HTML and JavaScript that runs on your own device. When you format SQL, convert a number to hexadecimal, encrypt a note with AES-256-GCM, generate fake test data or build a placeholder image, the text you type and the files you open are processed inside your browser tab. They are not uploaded to us, and there is no processing server, queue or account behind those tools.
Some tools cannot do their job without the network, and their pages say so plainly. The website checkers (Website Status Checker, Tech Stack Detector, Web Page Tools) ask a small ToolHub server function to fetch the address you enter, because browsers block most requests to other sites. IP address lookup asks public geolocation services about an IP, the exchange-rate charts download European Central Bank reference rates, the random article tool reads summaries from Wikipedia, and the font previewer loads typefaces from Google Fonts. The speech tools rely only on your browser's built-in speech features, and their page explains which of those may use the browser maker's online service.
Privacy by default
There are no user accounts, no sign-up forms and no analytics scripts on ToolHub. Pages are delivered by Cloudflare, and the site is funded by Google AdSense ads, which use cookies as described in the Privacy Policy. When a tool remembers something between visits — a running timer, your calculator history or a saved setting — it stores it in your browser's local storage, where you can clear it at any time.
Finding the right tool
- Search: type a word in the box at the top of this page, such as “json”, “loan”, “qr” or “time zone”, and the directory filters as you type.
- Browse by category: the buttons under the search box jump to each group, and every card has a one-line summary of what the tool does.
- Follow the guides: each tool page ends with related tools, so a JWT decoder leads to the API tester and a loan calculator to the exchange-rate charts.
The world data pages — country statistics, population, emissions, EV sales, internet use and similar tables — are static snapshots. Each one names the organisations its figures come from and explains the caveats, but none of them is a live feed, so check the original publisher before quoting a number in anything important. The same applies to the calculators: health, loan and construction results are estimates for planning and learning, not professional advice.
Feedback shapes the collection
ToolHub is maintained by a single independent developer. Tools are added when they solve a small, common problem well, and they are fixed or retired when they stop doing so. If a result looks wrong, a page is confusing or a tool you need is missing, the Contact page explains how to reach us; a note with the tool name, your browser and the steps you took is the fastest way to get something fixed. You can also read more about the project on the About page.
Frequently asked questions
Are the tools on ToolHub really free?
Yes. Every tool is free to use without an account, a trial or a paywall. The site is paid for by the Google AdSense ads shown on its pages.
Do I need to install anything or create an account?
No. Each tool is an ordinary web page for current desktop and mobile browsers such as Chrome, Edge, Firefox and Safari; the few that need a newer browser feature, like speech recognition, say so on their page. Nothing is installed and there is no sign-up.
Is the text or data I enter uploaded anywhere?
For most tools, no: the work happens in your browser. The exceptions are tools that must fetch something from the internet, such as the website status and technology checkers, IP lookup, exchange rates, random Wikipedia articles, Google Fonts and browser speech recognition. Each of those pages says what is sent and to whom, and the Privacy Policy lists them all.
How current are the figures on the world data pages?
They are static snapshots compiled from the sources named on each page, not live feeds. Rankings and statistics change every year, so check the original publisher before relying on a specific number.
Can I use what I create with these tools in my own work?
Yes. Text, images, QR codes, charts and other output you make are yours to use, including commercially. Content from third parties keeps its own licence; Wikipedia summaries, for example, are CC BY-SA.
How do I report a bug or suggest a new tool?
Email us from the Contact page. Mention the tool, what you did, what you expected and your browser, and we will look into it.