Polish writing before publishing
Measure length, spot repetition and standardize headings.
Practical browser tools
Useful online tools with clear, reviewed guidance
A curated collection for text, development, calculations, images, PDFs and everyday digital tasks. No sign-up or installation required.
Popular:Robots.txt CheckerCompound Interest CalculatorWord CounterPassword GeneratorJSON Formatter & ValidatorBMI Calculator
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Reviewed categories
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Reviewed tools
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Complete a task, not just one step
Practical workflows connect the right tools in a useful order.
Create stronger account credentials
Generate a random password, then review its strength before saving it.
Prepare an image for the web
Sample design colors and reduce the file before uploading it.
Compare a financial scenario
Calculate percentages, loan payments and growth with clear assumptions.
ToolBlur Language Lab
Normalize Arabic text with transparent, independent controls
An original browser-based workspace with side-by-side comparison, published methodology and downloadable JSON regression cases.
Browse reviewed categories
Start with categories that contain several carefully reviewed tools and practical guidance.
Featured tools
A curated selection of useful tools with reviewed guidance.
HOT
Word Counter
Count words, characters, sentences and reading time in real time.
OpenHOTPassword Generator
Create strong, secure, random passwords instantly.
OpenNEWJSON Formatter & Validator
Beautify, minify and validate JSON instantly.
OpenHOTBMI Calculator
Calculate your Body Mass Index and healthy weight range.
OpenNEWColor Converter (HEX / RGB / HSL)
Pick a color and convert between HEX, RGB and HSL.
OpenUnit Converter
Convert length, weight and temperature units.
OpenNEWImage Compressor
Compress JPG & PNG images to a smaller size.
OpenMerge PDF
Combine multiple PDF files into one document.
OpenNEWRemove Line Breaks
Remove unwanted line breaks while preserving real paragraphs.
OpenPopular tools
HOT
Word Counter
Count words, characters, sentences and reading time in real time.
OpenHOTCase Converter
Convert text to UPPERCASE, lowercase, Title Case and more.
OpenHOTPassword Generator
Create strong, secure, random passwords instantly.
OpenHOTBMI Calculator
Calculate your Body Mass Index and healthy weight range.
OpenHOTPercentage Calculator
Solve percentage, change and discount problems fast.
OpenHOTCompound Interest Calculator
See how your savings grow with compound interest.
OpenNEWRobots.txt Checker
Check robots.txt syntax, groups, sitemaps and common mistakes safely.
OpenNewest reviewed tools
NEW
JSON Formatter & Validator
Beautify, minify and validate JSON instantly.
OpenNEWUUID Generator
Generate random RFC-4122 version 4 UUIDs in bulk.
OpenNEWSlug Generator
Turn any title into a clean, SEO-friendly URL slug.
OpenNEWColor Converter (HEX / RGB / HSL)
Pick a color and convert between HEX, RGB and HSL.
OpenFeatured on
Latest guides and articles
Practical, reviewed guides that help you use the tools with confidence.
3 min read
Cron Expressions Explained: Fields, Timezones and Safe Scheduling
Learn how five-field cron schedules work, why timezone and daylight-saving rules matter, and how to verify the next runs before deployment.
4 min read
Markdown to HTML: A Safe Conversion and Publishing Guide
Convert Markdown accurately, understand the generated HTML, and avoid XSS and styling mistakes when publishing untrusted content.
3 min read
How to Convert WebP to JPG Without Unexpected Quality Loss
Understand JPEG quality, WebP transparency, repeated compression and the checks that produce a compatible image without avoidable damage.
3 min read
YAML vs JSON: How to Convert Configuration Without Breaking It
A practical guide to YAML and JSON conversion, including data types, comments, anchors, validation and production-safe review steps.
3 min read
What Is BMR and How to Calculate It
Your BMR is the calories your body burns at rest. Learn how to calculate it, what affects it, and how it guides your diet.
3 min read
How to Split a PDF File (Free, No Software)
Learn how to split a PDF into separate pages or a smaller range, safely and free, without uploading your file anywhere.
2 min read
How to Convert PNG to JPG (and When You Should)
Learn how to convert PNG to JPG, when each format is the right choice, and how to shrink your images without losing quality.
3 min read
What Is a JWT Token? Structure and How It Works
A JWT token carries login information between apps. Learn its three parts, how authentication works, and how to decode one.
Why ToolBlur?
Built to be fast, browser-first and genuinely useful.
Lightning fast
Tools are designed to respond quickly in modern browsers without unnecessary setup.
Browser-first privacy
Many tools process data locally on your device. We state browser-side processing only where it has been verified for that tool.
Always free
No account, no hidden fees. Just open a tool and use it.
Works everywhere
Responsive design for phone, tablet and desktop.
Frequently asked questions
Is ToolBlur really free?+
Yes. ToolBlur tools are free to use and do not require an account.
Do you store my data?+
Many ToolBlur utilities process text, numbers or files locally in your browser. We state browser-side processing only when it has been verified for a tool; the Privacy Policy explains site-level analytics and advertising practices.
Do I need to install anything?+
No installation is needed. ToolBlur works in modern browsers on desktop and mobile.
Can I use these tools for commercial work?+
Yes. You can use the utilities for personal or commercial workflows, subject to the terms and any requirements of the files or data you process.
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