Code & Build Helpers
Build, test and explain the snippets that glue projects together — regex, cron, Dockerfiles, cURL commands and type/POJO generation. Reach for Regex Tester/Explainer when debugging patterns, Cron Builder for schedules, and the JSON→Java/TypeScript generators to scaffold models from sample data.
9 free tools — no downloads, no sign-up.
Cron Expression Builder
Visual cron builder. Human-readable. Presets included.
Dockerfile & Docker Compose Generator
Generate Dockerfile and compose files for Node, Python, Go, Java. Pick DB, ports, env vars. No Docker experience needed.
Function Graph Plotter
Math function graphing. sin, cos, x², multi-function.
JSON to Java POJO/DTO Converter
Convert JSON to Java POJO classes with Lombok, Jackson, nested objects. Free online converter, no sign-up.
JSON to TypeScript Generator
Convert JSON to TypeScript interfaces, types, and enums. Optional readonly, strict null checks.
Regex Explainer
Translate regex to human language. Token-by-token explanation.
Regex Tester
Test regex in real-time. Highlight matches, groups.
Scientific Calculator
Trig, log, sqrt, power. Expression input with history.
cURL to Code Converter
Convert curl commands to Python, Node.js, and Java code. Parse -X, -H, -d flags. Free developer tool.
Frequently asked questions
Do these tools run my code?
No code is executed on a server — generation and testing happen locally in the browser.
What does the Regex Explainer do?
It breaks a regular expression into plain-English parts so you can understand what each token matches.
Can I generate Docker Compose files?
Yes, the Dockerfile & Compose generator produces both from your service definitions.