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Every page on ToolOrbit — 101 tools across 11 categories, plus guides.
Developer
- JSON Formatter & Validator
- Base64 Encode / Decode
- URL Encode / Decode
- UUID Generator
- Hash Generator
- JWT Decoder
- HTML Entity Encode/Decode
- Unix Timestamp Converter
- Number Base Converter
- Regex Tester
- JSON to CSV Converter
- Color Contrast Checker
- CSV to JSON Converter
- YAML ↔ JSON Converter
- XML Formatter & Validator
- JSON Escape / Unescape
- Cron Expression Generator
- SQL Formatter
- Chmod Calculator
- Markdown Previewer
- CSS Minifier & Beautifier
Learn
- Understanding JSON: A Practical Guide for Developers
- Technical SEO Basics Every Site Needs in 2026
- The Complete Guide to Image Optimization
- What Is Base64? How Encoding Works and Common Mistakes
- encodeURI vs encodeURIComponent: Which One to Use
- What Is a UUID? Version 4 vs Version 7 Explained
- How SHA-256 and SHA-512 Hashes Work: Hashing vs Encryption
- What Is a JWT? Header, Payload and Signature Explained
- What Is HTML Encoding? Entities & Escaping Explained
- Unix Time Explained: Seconds, Milliseconds and Time Zones
- Binary, Octal, Decimal and Hex: How Number Bases Work
- Regex Basics: How Patterns, Flags and Character Classes Work
- How to Convert JSON to CSV: Quoting and Nested Data
- WCAG Color Contrast Explained: AA and AAA Ratios
- Word and Character Limits That Matter for Writing and SEO
- What Is Lorem Ipsum and When Should You Use It?
- What Is a URL Slug? SEO Best Practices for Clean URLs
- What Is a Text Diff? How Line-by-Line Comparison Works
- Removing Duplicate Lines: What Counts as a Duplicate?
- Alphabetical vs Natural Sort: How Line Sorting Works
- Reversed and Upside-Down Text: How It Works
- How to Repeat Text 1,000 Times for WhatsApp (and Other Uses)
- When to Use Base64 Images (and When Not To)
- How to Calculate Percentages: 3 Formulas with Examples
- What Is BMI? Formula, Categories and Limitations
- How Age Is Calculated in Years, Months and Days
- Counting Days Between Dates: Inclusive vs Exclusive
- How to Calculate a Tip and Split the Bill
- How to Calculate a Discount, Stacked Deals and Sales Tax
- Unit Conversion Basics: Length, Weight, Temperature and Data
- How QR Codes Work: Error Correction, Size and Scanning Tips
- What Makes a Password Strong? Length, Randomness and Entropy
- How Random Number Generators Work (and What Makes a Draw Fair)
- HEX vs RGB vs HSL: Which Color Format to Use
- How CSS Gradients Work: Angles, Color Stops and Examples
- CSS box-shadow Explained: Offset, Blur, Spread and Inset
- CSS border-radius Explained: One, Two and Four Values
- How Loan EMI Is Calculated: The Formula Explained
- How Compound Interest Works: Formula and Examples
- How to Pick a Color from an Image (Copy HEX & RGB Codes)
- Crop vs Resize vs Compress: What Cropping Does to an Image
- PNG vs JPG vs WebP: Which Image Format Should You Use?
- Why Rotating an Image by 90 Degrees Loses No Quality
- How Image Filters Work: Grayscale, Sepia, Contrast and Blur
- Favicon Sizes: Which Ones You Need and How to Add Them
- How Text Summarizers Work: Extractive Summaries Explained
- How Readability Scores Work and Which One to Report
- How Sentiment Analysis Works (and Where It Fails)
- How Keyword Extraction Works and What to Do With the Results
- How Browser Text to Speech Works and How to Use It Well
- How to Choose Hashtags: Reach vs Relevance
- UTM Campaign Builder: Track Links With Confidence
- How to Write Title Tags and Meta Descriptions That Get Clicks
- What Is an XML Sitemap? Best Practices and Limits
- How to Write Numbers in Words: Rules and Examples
- How Roman Numerals Work: Symbols, Rules and Examples
- How to Calculate Mean, Median and Mode (Worked Example)
- How to Tell if a Number Is Prime (with a Worked Example)
- How to Learn the Times Tables: Which Facts to Learn First
- How to Calculate Weighted GPA on the 4.0 Scale
- How Simple Interest Works: Formula and Worked Example
- How to Calculate Sales Tax (and Remove It From a Total)
- How to Calculate Profit Margin (with a Worked Example)
- How Long Will It Take to Reach a Savings Goal?
- How to Calculate Your Break-Even Point (Formula + Example)
- How to Calculate Markup and Set a Selling Price
- How to Calculate ROI and Annualized ROI
- How to Merge PDF Files Online, Privately
- How to Split a PDF or Extract Pages
- How to Convert Images to PDF (JPG & PNG)
- How to Rotate a PDF and Save It Permanently
- How to Delete Pages from a PDF (Free, No Upload)
- How to Merge PDF Files Without Uploading Them Anywhere
- UTM Parameters Explained: How to Track Campaigns in GA4
- Cron Every 5 Minutes — and the Rest of Cron Syntax, Explained
- Cron Expression Cheat Sheet — Copy-Paste Schedule Examples
- Cron Every 10 Minutes — Syntax, Examples and Best Practices
- Your Photos Know Where You Live: How to Remove EXIF Data
- Mean vs Median vs Mode: Which Average Should You Use?
- Flesch Reading Ease Score Explained: What Is a Good Score?
- Markup vs Margin: The Difference That Costs Businesses Money
- Why CSV Is Tricky to Parse: Delimiters, Quotes and Headers
- YAML vs JSON: Differences That Matter When Converting
- XML Formatting and Common XML Errors Explained
- JSON String Escaping: What Needs Escaping and When
- Markdown Basics and Common Formatting Pitfalls
- Why Minify CSS? What Is Safe to Remove and What Can Break
- How to Write SEO Meta Tags: Title, Description and Open Graph
- How to Create robots.txt: Allow, Disallow and Sitemap Rules
- Keyword Density Checklist: Analyse and Improve Your SEO Copy
- How to Find Keywords in Any Text (Free Method)
- Cron Every Hour, Day & Midnight: All Daily Schedules
- URL Encoding Explained: %20 vs +, Reserved Characters & Rules
- Percent Encoding Reference Table (Every Character)
- CSS Border Radius: 15 Copy-Paste Examples
- 10 Common robots.txt Rules Explained (with Examples)
- How Many Days Between Two Dates? (Calculator + Manual Method)
- Free Developer Tools Online: 2026 Developer Toolkit & Guides
- Watermarking a PDF: text stamps explained
- Page numbers in a PDF: placement, format and start values
- How to create a reusable digital signature image
- Hourly to salary: the 2,080-hour rule and its limits
- VAT explained: adding and removing tax the right way
- GST rates in India: slabs, CGST and SGST explained
- What is CAGR: annualized growth without the jargon
- How to run a fair name draw in your classroom or giveaway
- Barcode formats compared: Code 128 vs EAN-13 vs UPC
- What belongs on a freelance invoice (and what never does)