Developer & Marketing Tools — Free Online Tools

SEO Tools

SEO Analyzer

Analyze webpage SEO factors and get a score from 0–100.

SEO Tools

Meta Title Checker

Check title length, keyword usage, and SEO score with suggestions.

SEO Tools

Meta Description Checker

Check description length, keywords, and SEO recommendations.

SEO Tools

Keyword Density Checker

Extract keywords and show frequency percentages.

SEO Tools

Keyword Research Tool

Generate keyword ideas from a seed topic.

SEO Tools

Keyword Difficulty Checker

Estimate keyword competition difficulty.

SEO Tools

SERP Preview Tool

Preview how your page appears in Google search results.

SEO Tools

Sitemap Generator

Generate XML sitemap structure for download.

SEO Tools

Robots.txt Generator

Generate robots.txt based on your options.

SEO Tools

Schema Markup Generator

Generate JSON-LD schema for Organization, Article, Product, FAQ, and more.

SEO Tools

Canonical URL Checker

Check canonical tag presence and validity.

SEO Tools

Broken Link Checker

Scan a URL and find broken links with status codes.

SEO Tools

Internal Link Analyzer

Analyze internal vs external link distribution.

SEO Tools

Backlink Checker

Check backlinks for a domain (API-ready placeholder).

SEO Tools

Domain Authority Checker

Estimate domain authority (API-ready placeholder).

Content Marketing

AI Content Idea Generator

Generate content ideas for your niche.

Content Marketing

Blog Title Generator

Generate catchy blog post titles.

Content Marketing

Blog Outline Generator

Create a structured blog post outline.

Content Marketing

Paragraph Rewriter

Rewrite paragraphs for clarity and uniqueness.

Content Marketing

Article Word Counter

Count words, characters, and reading time.

Content Marketing

Readability Checker

Analyze Flesch reading ease and grade level.

Content Marketing

Grammar Checker

Check grammar and writing issues.

Content Marketing

Content Score Checker

Score content quality for SEO.

Content Marketing

Duplicate Content Checker

Compare two texts for similarity.

Social Media

Hashtag Generator

Generate relevant hashtags for posts.

Social Media

Social Media Post Generator

Generate social media post copy.

Social Media

Instagram Caption Generator

Create engaging Instagram captions.

Social Media

YouTube Title Generator

Generate click-worthy YouTube titles.

Social Media

YouTube Description Generator

Create YouTube video descriptions.

Social Media

Social Media Character Counter

Count characters against platform limits.

Email Marketing

Email Subject Line Tester

Score email subject lines for deliverability.

Email Marketing

Email Preview Generator

Preview how your email appears in inbox.

Email Marketing

Email Signature Generator

Generate professional email signatures.

Email Marketing

UTM Generator

Build UTM-tagged campaign URLs.

Advertising

Google Ads Keyword Planner UI

Explore keyword ideas for Google Ads campaigns.

Advertising

Ad Copy Generator

Generate ad headlines and descriptions.

Advertising

Facebook Ad Text Generator

Create Facebook ad primary text and headlines.

Advertising

CPC Calculator

Calculate cost per click from spend and clicks.

Advertising

CPM Calculator

Calculate cost per thousand impressions.

Advertising

ROI Calculator

Calculate return on investment.

Advertising

Conversion Rate Calculator

Calculate conversion rate from visitors.

Analytics

Traffic Calculator

Project traffic growth over time.

Analytics

Engagement Rate Calculator

Calculate social engagement rate.

Analytics

Bounce Rate Calculator

Calculate website bounce rate.

Analytics

Marketing Funnel Calculator

Analyze visitor → lead → customer funnel.

HTML Tools

HTML Formatter

Beautify and format HTML markup.

HTML Tools

HTML Minifier

Minify HTML to reduce file size.

HTML Tools

HTML Validator

Validate HTML structure.

HTML Tools

HTML Encoder/Decoder

Encode or decode HTML entities.

CSS Tools

CSS Formatter

Format CSS for readability.

CSS Tools

CSS Minifier

Minify CSS stylesheets.

CSS Tools

CSS Gradient Generator

Generate CSS gradient code.

CSS Tools

CSS Box Shadow Generator

Generate box-shadow CSS.

CSS Tools

CSS Animation Generator

Generate CSS keyframe animations.

CSS Tools

CSS Flexbox Generator

Generate flexbox layout CSS.

CSS Tools

CSS Grid Generator

Generate CSS grid layout.

JavaScript Tools

JS Formatter

Format JavaScript code.

JavaScript Tools

JS Minifier

Minify JavaScript.

JavaScript Tools

JSON Formatter

Format and beautify JSON.

JavaScript Tools

JSON Validator

Validate JSON syntax.

JavaScript Tools

JSON Converter

Convert JSON to XML or CSV.

JavaScript Tools

JS Obfuscator

Basic JavaScript obfuscation.

Frontend Tools

Color Picker

Convert HEX to RGB and preview.

Frontend Tools

HEX/RGB Converter

Convert between HEX and RGB.

Frontend Tools

Responsive Screen Tester

Common responsive breakpoints reference.

Frontend Tools

Browser Compatibility Checker

Check browser support for web features.

Frontend Tools

Lorem Ipsum Generator

Generate placeholder text.

Frontend Tools

Dummy Text Generator

Generate dummy words or sentences.

URL Tools

URL Encoder

URL-encode strings.

URL Tools

URL Decoder

URL-decode strings.

URL Tools

URL Parser

Parse URL components.

URL Tools

Query String Generator

Build query strings from key=value pairs.

Android

APK Information Checker

Analyze APK package info (server upload).

Android

Package Name Generator

Generate Android package names.

Android

Android Manifest Generator

Generate AndroidManifest.xml.

Android

Version Code Generator

Convert version name to version code.

Android

App Icon Generator

Android launcher icon size guide.

iOS

Bundle ID Generator

Generate iOS bundle identifiers.

iOS

App Name Checker

Validate app name for store guidelines.

iOS

iOS Icon Size Guide

Required iOS app icon dimensions.

General App Tools

App Name Generator

Generate app name ideas.

General App Tools

App Description Generator

Generate app store descriptions.

General App Tools

App Store Description Generator

Format description for App Store.

General App Tools

App Screenshot Size Checker

Required screenshot dimensions.

General App Tools

App Feature Planner

Generate app feature roadmap template.

API Tools

REST API Tester

Send HTTP requests and inspect responses.

API Tools

API Response Formatter

Format API JSON responses.

API Tools

JSON API Validator

Validate JSON API response structure.

API Tools

JWT Decoder

Decode JWT tokens.

API Tools

JWT Generator

Generate demo JWT tokens.

API Tools

API Documentation Generator

Generate API endpoint documentation.

Manual Testing

Test Case Generator

Generate test cases from feature descriptions.

Manual Testing

Test Scenario Generator

Create BDD-style test scenarios.

Manual Testing

Bug Report Generator

Generate structured bug reports.

Manual Testing

Test Plan Generator

Create test plan templates.

Automation Testing

XPath Generator

Generate XPath selectors.

Automation Testing

CSS Selector Generator

Generate CSS selectors for automation.

Automation Testing

Regex Tester

Test regex patterns against text.

Automation Testing

Regex Generator

Generate common regex patterns.

API Testing

HTTP Status Code Checker

Look up HTTP status code meanings.

API Testing

API Request Builder

Build HTTP request templates.

API Testing

API Response Validator

Validate API response structure.

API Testing

JSON Schema Validator

Validate JSON against schema rules.

Performance Testing

Load Calculator

Calculate load test parameters.

Performance Testing

Response Time Calculator

Calculate average response time.

Performance Testing

Performance Score Checker

Score page performance metrics.

Security Testing

Password Strength Checker

Evaluate password strength.

Security Testing

Hash Generator

Generate SHA hashes.

Security Testing

Hash Checker

Verify text against a hash.

Security Testing

Base64 Encoder/Decoder

Encode or decode Base64.

Security Testing

Encryption/Decryption Tool

Simple XOR encryption demo.