Developer's Toolkit
113+ free developer tools in one place — no ads, no sign-up. Everything runs in your browser.
- Runs in your browser
- No ads, no tracking
- Free, no sign-up
Most used on DevTools
Test Data Generators
Generate valid test identities, bank accounts and tax numbers for your development and QA environments — no real data involved.
National Identity Generator
Checksum-valid national IDs — TC Kimlik, SSN, Emirates ID, CPF, NRIC and more.
IBAN & SWIFT Generator
Validate, format and generate IBANs plus SWIFT/BIC codes.
Tax Number Generator
Format-valid tax IDs — VKN, EIN, TFN, Steuernummer, VAT, UEN and more.
Fresh off the bench
Did you try our newest tools?
Six brand-new utilities for networking, systems and DevOps work — all running entirely in your browser, no sign-up required.
Subnet Calculator
CIDR → network, broadcast, host range, masks and a visual bit map. IPv4 & IPv6.
Programmer Calculator
Binary/hex/dec/octal at once, bitwise ops and IEEE 754 float inspection.
DB Connection String
Build URL-encoded connection strings for Postgres, MySQL, Mongo, Redis, SQLite.
Docker Compose Builder
Turn a form into a valid, correctly-indented docker-compose.yml in seconds.
NGINX Config Builder
Reverse proxy, static/SPA, SSL termination and HTTP→HTTPS from a wizard.
Regex Explainer
Plain-English, token-by-token breakdown of any regex with a live match preview.
Browse by category
Every tool runs in your browser — pick a category to dive in, or press ⌘K to search.
Color Tools
Color utilities and generators
Box Shadow Generator · Color Contrast Checker · Color Converter
Data Processing
Format, convert and process data
Base64 Encoder/Decoder · CSV to Chart · CSV to JSON Converter
Text & Analysis
Text processing and analysis tools
Case Converter & Text Formatter · Regex Explainer · String Escape Utilities
Generators
Generate IDs, references and more
Favicon Generator · HTTP Status Code Reference · IBAN & SWIFT Generator
Security Tools
Security analysis and authentication tools
AES Encryption · Basic Auth Generator · Bcrypt Generator & Verifier
Network & API Tools
HTTP clients and network utilities
DNS Lookup Tool · HTTP Header Parser · HTTP Request Builder
Development Utilities
Essential utilities for developers
Chmod Calculator · Cron Expression Builder · CSS/JS Minifier
Visual Tools
Preview and convert visual content
Aspect Ratio Calculator · Barcode Generator · Base64 Image Encoder
Frequently asked questions
Missing a tool? Found a bug?
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