isrange.com

Free IP, text & file tools for students, writers and developers.

IP Tools

My IP Address IP Lookup Blacklist Check

Text Tools

Word Counter Duplicate Line Remover Alphabetical Sorter Text Diff Checker Unicode Cleaner Text Case Converter Lorem Ipsum Generator

Date & Time Tools

Days Between Dates Business Day Calculator Age Calculator Unix/Epoch Converter Leap Year Checker Date Format Converter Timezone Meeting Finder Stopwatch Clock Pomodoro Timer

Converters & Calculators

Shoe Size Converter BMI Calculator Percentage Calculator Unit Converter Aspect Ratio Calculator Salary Calculator Color Converter GPA Calculator Tip Calculator Compound Interest Loan Calculator Paycheck Calculator Debt Payoff Calculator Sales Tax Calculator Inflation Calculator Calorie Calculator Random Number Generator Fraction Calculator

File Tools

QR Code Generator PDF to Markdown DOCX to Markdown Word to PDF PDF to Word Image Compressor Image Resizer Background Remover 2D Sprite Creator CSV to JSON

Developer Tools

JWT Decoder JWT Generator Prompt Token Counter Markdown + Mermaid Preview JSON Formatter JSON Validator YAML to JSON JSON to YAML XML to JSON SQL Formatter Cron Expression Generator Regex Tester Base64 Encode/Decode URL Encode/Decode UUID Generator Hash Generator ASCII Table Chmod Calculator Password Generator Subnet Calculator Markdown Table Generator Text to Speech Binary Converter Meta Tag Generator

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JSON Validator

JSON Validator

Paste JSON to instantly validate its syntax. Get detailed error messages with line and column numbers when something is wrong.

JSON Input

Frequently Asked Questions

Related tools

JWT Decoder

Decode and verify JSON Web Tokens instantly, no upload.

JWT Generator

Build and sign a JWT with a custom payload and secret.

Prompt Token Counter

Count LLM prompt tokens using OpenAI-compatible BPE encodings.