Free Developer API

Base URL

Example

Generate random UUIDs (v4) instantly. Perfect for database IDs, session tokens, and unique identifiers.

Generate random UUIDs (v4) via POST request.

Generate QR codes as Base64 or SVG. Embed URLs, text, or any data into scannable QR codes.

Generate QR codes via POST request with JSON body.

Generate Code 128 barcodes as SVG. Useful for product labels, inventory systems, and shipping.

Generate valid test credit card numbers with Luhn checksum. For testing payment systems only.

Generate test credit card numbers via POST request.

Generate secure random passwords with customizable length and character sets.

Generate secure random passwords via POST request.

Generate Lorem Ipsum placeholder text. Choose words, sentences, or paragraphs.

Generate Lorem Ipsum text via POST request.

Format and prettify JSON with customizable indentation. Make minified JSON readable.

Validate JSON syntax and structure. Check if your JSON is valid.

Minify JSON by removing all whitespace. Reduce file size for production.

Compare two JSON objects line-by-line and highlight differences.

Escape or unescape a JSON string. Useful for embedding JSON inside other JSON.

Convert JSON to YAML format. Transform configuration files between formats.

Convert YAML to JSON format. Parse YAML configuration files.

Convert XML to JSON. Parse XML documents and transform to JSON format.

Convert JSON to XML. Transform JSON data into XML format.

Convert CSV data to JSON array. Parse spreadsheet exports and CSV files.

Convert JSON array to CSV format. Export data for spreadsheet use.

Convert Markdown to HTML. Transform .md files to HTML for web rendering.

Convert HTML to Markdown. Transform web pages to Markdown format.

Convert timestamps between Unix, ISO 8601, and human-readable formats.

Convert between Unix timestamps and human-readable dates. Supports toDate and toTimestamp modes.

Convert numbers between any bases (binary, octal, decimal, hex, and custom bases 2–36).

Convert colors between HEX, RGB, HSL, and CMYK formats.

Encode text or data to Base64 format.

Decode Base64 encoded strings back to original text.

URL encode strings for safe transmission in URLs.

Decode URL encoded strings back to readable text.

Encode HTML entities. Convert <, >, &, and quotes to safe HTML entities.

Decode HTML entities back to their original characters.

Convert text to binary representation (8-bit ASCII codes separated by spaces).

Convert binary string back to text. Input binary groups separated by spaces.

Convert text to hexadecimal encoding.

Convert hexadecimal string back to readable text.

Escape or unescape Unicode characters in strings (\uXXXX format).

Count words, characters, sentences, paragraphs, and lines in text.

Compare two texts and show line-by-line differences.

Convert text to URL-friendly slugs for SEO-optimized URLs.

Convert text between camelCase, PascalCase, snake_case, kebab-case, and more.

Remove duplicate lines from text. Useful for cleaning up lists and log files.

Sort lines of text alphabetically in ascending or descending order.

Generate MD5, SHA-1, SHA-256, or SHA-512 hashes from any text input.

Generate cryptographic hashes via POST request.

Decode JWT tokens without verification. View header and payload claims.

Validate JWT token structure, decode its payload, and check expiry.

Check password strength using zxcvbn. Get detailed feedback and crack time estimates.

Validate email address format and structure.

Test regular expressions against text. Find matches and validate patterns.

Generate realistic mock user data for testing. Includes names, emails, phone numbers, and avatars.

Generate mock user data via POST request.

Generate realistic mock addresses with street, city, state, and coordinates.

Generate realistic mock company data for testing business applications.

Generate custom mock JSON data from a schema. Define your own data structure.

Duplicate an existing dataset with configurable field generation strategies (keep, random, sequential). Scale up to 10,000 rows.

Format and beautify SQL queries for improved readability.

Minify SQL queries by removing unnecessary whitespace.

Escape or unescape SQL string values to prevent SQL injection. Escapes single quotes.

Parse and validate cron expressions. Get next 5 execution times.

Format Kafka messages for CLI, JSON, or kafkacat output. Generate producer commands for testing.

Validate Kafka topic configuration and generate kafka-topics.sh CLI commands.