Validator Tools

Validate data formats and schemas—JSON, HTML, CSS and more—with clear error messages and instant feedback for reliable data validation and quality assurance.

16 tools available

Blockchain Tools 3

Checksum Address Converter

Convert Ethereum addresses to EIP-55 checksum format. Validate and format ETH, BSC, Polygon addresses with mixed-case checksums for error detection.

Blockchain Tools
BIP39 Mnemonic

Generate and validate BIP39 mnemonic seed phrases. Create secure 12-24 word recovery phrases for crypto wallets. Convert mnemonic to seed hex instantly.

Blockchain Tools
Crypto Address Validator

Validate cryptocurrency addresses for Bitcoin, Ethereum, Solana, Cardano, and 10+ blockchains. Auto-detect address format and verify validity instantly.

Blockchain Tools

Developer Tools 5

Robots.txt Tester

Free online robots.txt tester and validator. Test if URLs are allowed or blocked by robots.txt rules for different search engine bots. Perfect for SEO and web developers.

Developer Tools › Utilities
Password Strength Tester

Test password strength with real-time analysis. Check security, entropy, crack time, and get recommendations. Generate cryptographically secure passwords instantly.

Developer Tools › Utilities
Regex Generator

Free online regex generator and tester with visual pattern builder. Create, test, and debug regular expressions easily. Includes pattern library, component builder, syntax highlighting, and code generation for multiple languages. Perfect for developers and data validation.

Developer Tools › Generators
Robots.txt Generator

Free robots.txt generator tool. Create, test and validate robots.txt file for your website. Control search engine crawlers with easy-to-use interface. SEO optimization tool.

Developer Tools › Generators
Sitemap Generator

Free sitemap generator tool. Create XML sitemap for your website easily. Add URLs, set priorities, and generate SEO-friendly sitemap.xml file online.

Developer Tools › Generators

File Tools 3

File Compare

Compare two files online and see differences. Free file comparison tool. Compare text files, binary files. Highlight changes, additions, deletions.

File Tools
Hash Checker

Calculate file hashes online. Generate MD5, SHA-1, SHA-256, SHA-512 checksums. Free hash calculator tool. Verify file integrity easily.

File Tools
Type Detector

Detect file type by analyzing magic bytes. Find actual MIME type and file extension. Verify file authenticity. Free file type detector.

File Tools

Geography & Mapping Tools 3

WKT GeoJSON Converter

Free WKT GeoJSON converter: convert between Well-Known Text (WKT) and GeoJSON formats online. Validate, edit and visualize geometric data instantly.

Geography & Mapping Tools
GeoJSON Viewer

Free GeoJSON viewer: view, validate and visualize GeoJSON data on interactive map. Display points, lines, polygons. Check GeoJSON syntax and structure.

Geography & Mapping Tools
GeoJSON Validator

Free GeoJSON validator and repair tool. Validate GeoJSON syntax, detect errors, and automatically fix common issues like duplicate coordinates and empty properties.

Geography & Mapping Tools

Social Media Tools 1

Hashtag Analyzer

Analyze hashtags with frequency counting, length analysis, topic grouping, and duplicate detection. Find overused hashtags and optimize your social media strategy.

Social Media Tools

Text Tools 1

Text Difference

Compare two texts and find differences between them. A text diff checker highlights additions, deletions, and changes line by line, word by word, or character by character. Perfect for comparing code, documents, or any text content.

Text Tools