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Popular tools

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Word Counter

Count words, characters, sentences, paragraphs, and reading time in seconds.

ContentCount Words →

Image Compressor

Compress JPEG, PNG, and WebP images online without losing quality.

AI & ProductivityCompress Image →

IP Address Lookup

Find your public IP address and geolocation details — country, city, ISP, and timezone.

NetworkingLookup IP Address →

Find & Replace

Find and replace text in large blocks with regex support and real-time preview.

ContentFind & Replace →

CSV Splitter

Split large CSV files into smaller chunks by row count — fast, free, browser-based.

AI & ProductivitySplit CSV File →

Sitemap Generator

Generate XML sitemaps instantly to improve SEO.

DeveloperGenerate Sitemap →

Cron Builder

Build cron expressions visually with live preview and natural language descriptions.

DeveloperBuild Cron Schedule →

Technology Detector

Identify frameworks and technologies used by any website.

DeveloperDetect Technologies →

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AI Text Summarizer

Instantly generate concise summaries of long texts using AI.

AI & ProductivitySummarize Text →

API Explorer

Test and debug REST APIs with ease. Send requests and inspect responses in real time.

DeveloperExplore API →

Binary to Text Converter

Decode binary code into readable text.

Data ConversionConvert Binary to Text →

Case Converter

New

Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, and more — instantly as you type.

ContentConvert Case →

Color Picker & Palette Generator

Select colors and get HEX, RGB, HSL values with palette suggestions.

DesignPick a Color →

Cron Builder

Build cron expressions visually with live preview and natural language descriptions.

DeveloperBuild Cron Schedule →
CSS

CSS to Tailwind Converter

Convert plain CSS into equivalent Tailwind classes automatically.

DesignConvert to Tailwind →

CSV Splitter

Split large CSV files into smaller chunks by row count — fast, free, browser-based.

AI & ProductivitySplit CSV File →

CSV to JSON Converter

Transform CSV data into structured JSON format.

Data ConversionConvert CSV to JSON →

Currency Converter

Convert between 150+ currencies with live exchange rates. Fast and free.

Finance & BusinessConvert Currency →

Days Between Dates Calculator

Calculate the number of days between two selected dates.

Date & TimeCalculate Days →

Device Info

Identify and analyze your browser, operating system, and device details.

UtilityAnalyze Device Info →

DNS Lookup

Retrieve DNS records for any domain and troubleshoot configuration issues.

NetworkingPerform DNS Lookup →

Duplicate Line Remover

New

Remove duplicate lines from any text instantly. Case-insensitive matching, whitespace trimming, keep first or last occurrence. Live side-by-side diff with download.

ContentRemove Duplicates →

Email Address Validator

Verify if an email address is valid and properly formatted.

SecurityValidate Email →

Favicon Generator

Create custom favicons from your image with real-time preview and export.

DesignGenerate Favicon →

Find & Replace

Find and replace text in large blocks with regex support and real-time preview.

ContentFind & Replace →

GitHub Repo Analyzer

Inspect any public GitHub repository — languages, contributors, commit activity, and health metrics.

DeveloperAnalyze GitHub Repository →

HTML to Markdown Converter

Convert HTML content into Markdown syntax.

Data ConversionConvert HTML to Markdown →

HTTP Header Analyzer

Inspect and analyze HTTP headers of any website.

WebsiteAnalyze Headers →

Image Compressor

Compress JPEG, PNG, and WebP images online without losing quality.

AI & ProductivityCompress Image →

Image Converter

New

Convert images between JPEG, PNG, WebP, BMP, and GIF formats instantly. Free, browser-based — no upload to server.

AI & ProductivityConvert Image →

Image Cropper

New

Crop images with drag handles, fixed aspect ratios, or social media presets. Export as JPEG, PNG, or WebP — free, browser-based.

AI & ProductivityCrop Image →

Image Resizer

New

Resize images by dimensions, percentage, or target file size. Export as JPEG, PNG, or WebP — free, browser-based.

AI & ProductivityResize Image →

Image to Base64 Encoder

Convert images into Base64 format for easy embedding.

UtilityConvert Image to Base64 →

Invoice Generator & PDF Creator

Easily create, preview, and download invoices in PDF format.

Finance & BusinessCreate Invoice →

IP Address Lookup

Find your public IP address and geolocation details — country, city, ISP, and timezone.

NetworkingLookup IP Address →

JavaScript Obfuscator

Protect your JavaScript code by making it difficult to read or reverse-engineer.

DeveloperObfuscate JavaScript →

JSON Diff Checker

Compare two JSON objects and visualize differences in real time.

DeveloperCompare JSON →

JSON Formatter & Validator

Format, beautify, and validate JSON data online — free JSON linter.

DeveloperFormat & Validate JSON →

JSON to CSV Converter

Convert JSON data into CSV for easy spreadsheet analysis.

Data ConversionConvert JSON to CSV →

JWT Decoder

Decode and inspect JSON Web Tokens — view header, payload, and claims instantly.

SecurityDecode JWT →

Markdown Editor

Write and preview Markdown with real-time rendering for documentation and content.

ContentOpen Markdown Editor →

Markdown to HTML Converter

Transform Markdown text into clean HTML format.

Data ConversionConvert Markdown to HTML →

Mock Data Generator

New

Generate realistic mock data for testing and development. Build a custom schema, set row count, and export as JSON, CSV, or SQL.

DeveloperMock Data Generator →

OG Previewer

Preview and generate Open Graph meta tags with live previews.

DeveloperPreview OG Tags →

PDF Tools

New

Merge, split, rotate, and delete pages from PDF files.

filePDF Tools →

Profit Margin Calculator

Calculate your profit margin based on cost and revenue.

Finance & BusinessCalculate Profit Margin →

QR Code Generator

Generate custom QR codes for links, text, or other data.

UtilityGenerate QR Code →

Radius Generator

Generate custom CSS border-radius values visually.

DesignGenerate Border Radius →

Secret Key Generator

Generate secure random keys, API tokens, or passwords.

SecurityGenerate Secret Key →

Sitemap Generator

Generate XML sitemaps instantly to improve SEO.

DeveloperGenerate Sitemap →

Solar System Calculator

New

Size a solar system accurately. Calculate inverter, battery, and panel requirements from your appliance list.

CalculatorSolar System Calculator →

SSL Checker

Analyze and verify SSL certificates for any domain.

SecurityCheck SSL Certificate →

State Machine Visualizer

Visualize and interact with finite state machines using JSON configuration.

DeveloperVisualize State Machine →

Technology Detector

Identify frameworks and technologies used by any website.

DeveloperDetect Technologies →

Text Cleaner

Clean and format text with one click using customizable rules.

ContentClean Text →

Text Diff Checker

Compare two texts side-by-side and spot every difference.

ContentCompare Texts →

Text to Binary Converter

Convert text into binary code representation.

Data ConversionConvert Text to Binary →

Timestamp Converter

New

Convert Unix timestamps to human-readable dates and back. Supports seconds, milliseconds, ISO 8601, UTC strings, and relative expressions. Full timezone support.

Date & TimeConvert Timestamp →

Website Latency Tester

Measure website response time and network latency.

WebsiteTest Website Latency →

Website Status Checker

Check if your website is online and diagnose potential issues.

WebsiteCheck Website Status →

WHOIS Domain Lookup

Look up WHOIS data for any domain — registrar, expiry date, and nameservers.

DomainCheck Domain Info →
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Word Counter

Count words, characters, sentences, paragraphs, and reading time in seconds.

ContentCount Words →

Word Separator

New

Join words with hyphens, underscores, dots, or a custom separator. Apply case formatting including camelCase and PascalCase.

ContentWord Separator →

YouTube Thumbnail Downloader

Download high-resolution YouTube video thumbnails.

MediaDownload YouTube Thumbnail →

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Articles

Insights & Tutorials

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Cover image for: Wi-Fi Connected but No Internet? 12 Ways to Fix It (2026)
Sep 1, 20268 MIN READ min readℵi✗✗

Wi-Fi Connected but No Internet? 12 Ways to Fix It (2026)

Connected to Wi-Fi but nothing loads? Here are 12 fixes for 'Connected, no internet' on Windows, Mac, iPhone, and Android, plus how to pinpoint the cause in under a minute.

Cover image for: Next.js File Uploads Work Locally but Break in Production? Here's How to Fix It (2026)
Aug 18, 20269 MIN READ min readℵi✗✗

Next.js File Uploads Work Locally but Break in Production? Here's How to Fix It (2026)

File uploads work locally but images return 404 in production? The cause is almost always a mismatch between where files are saved and how your web server serves them. Here is how to fix it.

Cover image for: Bought a Used Mac and It Says 'Remote Management'? Here's What It Means and How to Fix It (2026)
Aug 11, 20267 MIN READ min readℵi✗✗

Bought a Used Mac and It Says 'Remote Management'? Here's What It Means and How to Fix It (2026)

A Remote Management screen on a used Mac means it is still enrolled in an organization's device management system. Here is why erasing the Mac does not fix it and what actually does.

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About

Why NIXX/DEV?

NIXX/DEV is your shortcut to productivity. Stop googling for basic tools like word counters or image compressors. Everything you need is right here — clean, reliable, and ready in one click.

These tools are engineered to save time and reduce friction. Whether you're writing, coding, or planning your next project, our tools work instantly without unnecessary complexity or distractions.

Built with care for developers and creators. We're constantly expanding our collection and refining existing tools based on real user feedback.

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New tools and updates shipped regularly.

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