Developer Toolkit
38 free tools for developers. Pick a category or search for a tool.
GET Slugify
Convert any text into a URL-friendly slug.
GET Case Converter
Convert text between camelCase, snake_case, kebab-case, PascalCase, UPPER, lower.
GET Word & Char Counter
Count words, characters, sentences, paragraphs, and estimate reading time.
GET Readability Score
Analyze text readability with Flesch-Kincaid, Gunning Fog, and more.
GET Text Extractor
Extract emails, URLs, phone numbers, or hashtags from text.
GET Text Similarity
Compare two strings using Levenshtein distance and Jaro-Winkler similarity.
POST Markdown to HTML
Convert Markdown text to HTML.
GET Base64
Encode or decode Base64 strings.
GET URL Encode
Encode or decode URL components.
GET JWT Decode
Decode a JSON Web Token without verification. See header, payload, and expiration status.
GET HTML Entities
Encode or decode HTML entities (< > & etc.)
GET MD5 Hash
Generate an MD5 hash from text.
GET SHA-256 Hash
Generate a SHA-256 hash from text.
GET SHA-512 Hash
Generate a SHA-512 hash from text.
GET HMAC
Generate an HMAC signature with a secret key.
GET URL Validator
Validate and parse a URL into its components.
GET Credit Card Validator
Validate a credit card number using the Luhn algorithm. Detects card type.
GET IBAN Validator
Validate an International Bank Account Number.
GET Phone Validator
Validate and parse an international phone number.
GET UUID Generator
Generate random UUIDs (v4).
GET Password Generator
Generate a secure random password.
GET Lorem Ipsum
Generate placeholder text.
GET QR Code Generator
Generate a QR code for any text or URL.
GET Placeholder Image
Generate an SVG placeholder image for mockups and wireframes.
GET Color Converter
Convert colors between HEX, RGB, HSL formats.
GET DateTime Converter
Convert between timestamps and dates. Supports Unix timestamps and ISO 8601.
GET JSON Validator
Validate and format JSON. Detects syntax errors with line/position info.
POST JSON Diff
Compare two JSON objects and see the differences.
POST CSV to JSON
Convert CSV data to JSON format.
POST JSON to CSV
Convert a JSON array to CSV format.
GET Cron Expression Parser
Parse a cron expression and see the next scheduled runs.
GET User-Agent Parser
Parse a User-Agent string to detect browser, OS, and device type.
GET Regex Tester
Test a regular expression against text and see all matches.
GET Email Validator
Validate an email address format and check domain MX records.
GET Disposable Email Check
Check if an email domain is a temporary/disposable email service.
GET MX Lookup
Look up MX (mail exchange) records for a domain.
GET Email Typo Suggester
Detect common typos in email addresses and suggest corrections.