Image Tools
Image Compressor
Re-encode a JPEG or WebP image at your chosen quality.
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u18chan — Free Online Tools
Discover fast, simple and free online tools for text, images, developers, calculations, conversions, SEO and everyday digital tasks.
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✓ Free to use✓ No installation✓ Built for your browser
YOUR EVERYDAY DIGITAL TOOLKIT{ }
A little clarity, instantly.↗
9Words
60Characters
100%Browser based
JSON, made readableFormat. Validate. Get on with it.
↗Images, a little lighterCompress right in your browser.
↗55 useful tools, one placeNo account needed for built-in toolsMade for everyday tasks ↗
LESS FRICTION. MORE DONE.
View all tools Popular Online Tools
A good place to start. Our featured picks for everyday digital work.
Image Tools
Image Resizer
Set new pixel dimensions while preserving proportions if needed.
Use ToolDeveloper Tools
JSON Formatter
Format JSON with readable indentation and check for syntax errors.
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Password Generator
Create random passwords with cryptographic browser randomness.
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Percentage Calculator
Calculate a percentage of a value or a percentage change.
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QR Code Generator
Create a scannable QR code for a link or a short piece of text.
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Slug Generator
Turn a heading into a clean, hyphen-separated URL slug.
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Word Counter
Count words, characters, sentences and reading time as you type.
Use ToolFIND YOUR FLOW
Explore Tools by Category
Text Tools
Work with text faster.
7 toolsDeveloper Tools
Make data easier to work with.
12 toolsImage Tools
Give your images a lighter footprint.
8 toolsSEO Tools
Build the small details that matter.
7 toolsCalculator Tools
Everyday maths, made simple.
7 toolsGenerator Tools
A useful starting point, instantly.
4 toolsConverter Tools
Different units. One clear answer.
7 toolsUtility Tools
Small helpers for your digital day.
3 toolsKEEP THESE CLOSE
Explore the collection Featured Tools
Simple tools for the tasks that keep coming back.
Image Tools
Image Compressor
Re-encode a JPEG or WebP image at your chosen quality.
Use ToolImage Tools
Image Resizer
Set new pixel dimensions while preserving proportions if needed.
Use ToolDeveloper Tools
JSON Formatter
Format JSON with readable indentation and check for syntax errors.
Use ToolGenerator Tools
Password Generator
Create random passwords with cryptographic browser randomness.
Use ToolCalculator Tools
Percentage Calculator
Calculate a percentage of a value or a percentage change.
Use ToolGenerator Tools
QR Code Generator
Create a scannable QR code for a link or a short piece of text.
Use ToolFROM TASK TO DONE
How U18-CHAN Tools Work
Choose a Tool
Find the tool you need from our categories or search.
Enter Your Information
Enter text, choose a local image or provide the required values.
Get Your Result
Copy the output or download your result when available.
USEFUL BY DESIGN
Why Use U18-CHAN?
Free to Use
Access useful online tools without a payment or account for built-in utilities.
Fast Results
Get focused results with local browser processing and clear controls.
No Installation
Use tools directly from a modern web browser.
Mobile Friendly
Work on your phone, tablet or desktop with responsive interfaces.
A CLEARER WAY TO WORK
Simple Tools. Simple Experience.
Built-in tools process text, images and calculations in your browser. Tool input is not uploaded to a processing server. Page visits and searches reach this website; the contact form sends your message by email.
Read our privacy policyA GROWING TOOLKIT
View all tools Recently Added Tools
Utility Tools
Text Difference Checker
Compare two text blocks line by line.
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Stopwatch
Time a task with start, pause, reset and lap controls.
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SHA-256 Generator
Calculate a SHA-256 digest of UTF-8 text or a local file.
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Binary Converter
Convert UTF-8 text to eight-bit binary groups and back.
Use ToolA LITTLE KNOW-HOW GOES A LONG WAY
Read all guides Helpful Guides & Tutorials
KNOW-HOW.
GUIDES & TUTORIALS
How to Improve Website Images
Look at the actual layout where an image appears. A card thumbnail, article illustration and wide hero image have different…
Read Guide ↗KNOW-HOW.
GUIDES & TUTORIALS
How Does URL Encoding Work?
A web address contains structural characters such as slashes, question marks and ampersands. A value placed inside a query parameter…
Read Guide ↗KNOW-HOW.
GUIDES & TUTORIALS
What Is Base64 Encoding?
Base64 represents bytes using a text alphabet. It is useful when a system expects text but the original data includes…
Read Guide ↗U18-CHAN, also known as u18chan, is a growing collection of free online tools designed to make everyday digital tasks easier. From text and image utilities to developer tools, calculators, generators and converters, we bring useful browser tools together in one simple platform.
Our goal is to offer straightforward tools without complicated software. Count words, format data, resize an image, create a QR code or perform a quick calculation, then get back to the work that matters.
GOOD QUESTIONS.
Frequently Asked Questions
A few things to know before you start.
What is U18-CHAN?
U18-CHAN is a free online platform with browser tools for everyday text, image, developer and calculation tasks.
Are U18-CHAN tools free?
Yes. The built-in tools are free to use without payment or an account.
Do I need to install software?
No. Use a modern browser with JavaScript enabled. Some features, such as cryptographic hashes, require HTTPS.
Can I use U18-CHAN on mobile?
Yes. The layouts and controls adapt to phones, tablets and desktop screens.
What types of tools are available?
Explore text, developer, image, SEO, calculator, generator, converter and utility tools.
Are new tools added?
The catalogue supports additional tools. Recently Added Tools shows published tools in date order.
ONE SMALL TASK. ONE SIMPLE TOOL.
Find Your Tool