Generators
126 free generators tools in the Developer Tools collection — every one runs in your browser with no signup and no uploads. Page 1 of 2.
API Key Setup Documentation Builder
Document how to obtain, use, and secure your API key for developers
Barcode Generator (EAN / Code 128 / Code 39 / UPC)
Generate EAN-13, UPC-A, Code 39, and Code 128 barcodes as scalable SVG.
CHANGELOG Entry Generator
Keep-a-changelog format release notes
ISO Shipping Container Size Reference
20ft, 40ft, high-cube and special container dimensions and capacity.
Unified Diff to Patch File Generator
Create a .patch file from two pasted text versions, with line context.
Audit Log Entry Generator
Fake audit trail entries for compliance tool demos
Fake Background Check Result Generator
Fictional background check summaries for HR demos
Fake Certificate Thumbprint Generator
SHA-1 and SHA-256 thumbprint format strings
CI Pipeline Output Generator
Fake CI/CD build log output for tool demos
Fake Company Generator
Fictional company names and details for demos
Fake Company Registration Number Generator
Company number format stubs for business tool demos
Fake Contract Clause Generator
Fictional legal clause text for legal tool demos
Random GPS Coordinates Generator
Valid latitude/longitude pairs for geospatial testing
Fake Credit Card Generator (Test)
Luhn-valid test card numbers, never real cards
CRM Contact Record Generator
Fake contact records for CRM tool demos
Fake Crypto Portfolio Generator
Fictional crypto holdings for wallet app demos
Fake DOI Generator
DOI-format identifiers for academic tool testing
Fake Email Generator
Disposable-style fake emails for test data
Fake Git Commit History Generator
Synthetic git log output for tool demos
Fake IBAN Generator (Test)
Valid-format IBAN numbers for testing bank flows
Fake ISBN Generator
Check-digit-valid ISBN-13 strings for book demos
Fake LinkedIn Profile Generator
Professional profile data for B2B tool mockups
Markdown Document Generator
Fake documents with all Markdown elements
Fake Medical Record Generator
Anonymized fake patient records for health demos
Fake Order History Generator
Synthetic order data for e-commerce app demos
Fake Passport Number Generator
Country-specific passport number format stubs
Fake Person Profile Generator
Complete fictional identity for testing and demos
International Fake Phone Number Generator
Country-code formatted test phone numbers worldwide
Fake Purchase Order Generator
Fictional POs for procurement tool testing
SaaS Subscription Record Generator
Fake subscription data for SaaS analytics demos
Fake Sensor Log Generator
Simulated sensor log files for IoT testing
Fake Social Media Stats Generator
Believable follower and engagement counts for mockups
Fake SSH Key Fingerprint Generator
MD5 and SHA-256 SSH fingerprint format strings
Fake SSN Generator (US Test Format)
Invalid-by-design SSN-format strings for testing
Fake Stock Price Generator
Fictional ticker symbols and price history
Support Ticket Generator
Fake customer support tickets for helpdesk demos
Survey Response Dataset Generator
Fake survey response datasets for analytics demos
Fake Terraform Plan Output Generator
Simulated Terraform plan output for IaC demos
Fake Twitter/X Profile Generator
Fictional social profile data for UI mockups
Fake VAT Number Generator
EU VAT number format strings for tax tool testing
Fake Vehicle VIN Generator
Check-digit-valid VIN strings for auto testing
Webhook Payload Generator
Realistic webhook event payloads for testing
.htaccess Generator
Apache .htaccess rules for redirects and security
IP Address Generator
Random IPv4 and IPv6 addresses for testing
Open Source License Picker & Generator
Choose the right license for your project and generate the LICENSE file
MAC Address Generator
Valid random MAC addresses for network testing
Mock GraphQL Response Generator
Fake GraphQL query responses for frontend dev
Mock .env File Generator
Fake environment variable files for dev setup
N-gram Generator
Extract character and word n-grams from any text.
CSP Nonce Generator
Generate cryptographically random nonces for Content Security Policy script/style tags
TOTP Secret Generator
Base32 OTP secrets for authenticator apps
Password Strength Checker
Estimate password entropy, detect weak patterns, and see time-to-crack — locally.
Placeholder Name Generator (Mx. / Gender-Neutral)
Gender-neutral placeholder names for inclusive demos
Programming Language Typing Reference
Static vs dynamic, strong vs weak typing for 40+ languages.
Random API Response Generator
Fake REST API JSON responses for frontend mocking
Random Blog Post Generator
Fake blog post stubs for CMS and content demos
Random Calendar Event Generator
Fake calendar events for scheduling tool demos
Random Chat Message Generator
Fake chat conversations for messaging app demos
Random Git Commit Message Generator
Conventionally-formatted fake commit messages
Cron Expression Generator
Valid cron schedule expressions with human description
Design Token Set Generator
Complete design token collections for design systems
Docker Tag Generator
Versioned Docker image tags for CI pipelines
E-commerce Product Review Generator
Realistic fake product reviews for shop demos
Election Result Generator
Fictional election results for civic tech demos
Random Error Message Generator
Fake error messages for QA and UI testing
Forum Post Generator
Fake forum threads and replies for community demos
Hotel Listing Generator
Fake hotel listings for travel platform demos
Random HTTP Header Generator
Standard HTTP header name-value pairs
Random Invoice Generator
Fake invoice data for accounting tool mockups
Random Job Posting Generator
Fake job descriptions for HR and recruiting tools
Random MIME Type Generator
IANA MIME type strings for file handling tests
News Feed Data Generator
Fake news article feeds for app mockups
Random Push Notification Generator
Fake push notifications for mobile app mockups
Open Graph Meta Tags Generator
og: meta tag snippets for social sharing previews
Org Chart Data Generator
Hierarchical team structures for HR app demos
Password Policy Generator
Password policy rule sets for security configs
Privacy Policy Clause Generator
Plain-language privacy policy clauses for demos
Random Product Review Generator
Fake product reviews for e-commerce mockups
Project Timeline Generator
Fake project milestones for PM tool demos
Random Regex Pattern Generator
Common regex patterns for validation tasks
Semantic Version Generator
Valid semver version strings for package releases
Social Media Feed Generator
Fake social timeline posts for UI mockups
Sports Score Generator
Realistic fake scores for sports app mockups
Random Tech Stack Generator
Random technology stack combos for side projects
Terms of Service Clause Generator
ToS clause stubs for legal document tool demos
Random Timezone Generator
Random IANA timezone identifiers for testing
Random User Agent Generator
Realistic browser user-agent strings for testing
README Badge Generator
Shields.io-style badges for GitHub README files
README.md Generator
Generate a complete project README with badges, install, and usage
Recovery Codes Generator
Backup recovery codes for 2FA systems
Password Salt Generator
Random cryptographic salts for password hashing
Sample E-commerce Dataset Generator
Fake product catalog data for shop demos
Sample Finance Dataset Generator
Fake transaction and account data for fintech demos
Sample Healthcare Dataset Generator
Anonymized fake patient records for health-tech demos
Sample HR Dataset Generator
Fake employee records for HRIS tool demos
Sample IoT Sensor Dataset Generator
Fake time-series sensor readings for IoT demos
ISO 6346 Container Type Code Reference
Decode ISO 6346 size and type codes like 22G1, 42G1, and 45R1.
Spacing Scale Generator
Consistent spacing scales for design systems
SSH Key Pair Generator
Generate Ed25519 or RSA SSH key pairs entirely in your browser.
Secure Token Generator
Cryptographically random tokens for auth systems