Dev Tools for Tech Leads
Tech leads need tools across the full engineering stack — from generating standardized documentation and choosing open source licenses, to validating APIs and schemas, to planning capacity with probability calculators. The technical breadth of the role means you switch contexts constantly. This collection curates the tools that help tech leads make quick technical decisions, generate boilerplate documentation, validate architectural choices, and unblock team members — all without leaving the browser.
Validate JSON data against a JSON Schema and see detailed violations.
Compare two JSON objects and highlight added, removed, and changed keys.
Compare two YAML documents and show key-path differences with old and new values.
Compare two XML documents and highlight structural and value differences.
Compare two texts side by side and highlight differences.
Validate semantic version strings and parse major, minor, patch, pre-release, and build metadata.
Browse open-source licenses and generate the full license text for your project.
Generate a well-structured README.md from a simple form.
Generate a CHANGELOG.md following the Keep a Changelog format.
Generate a CONTRIBUTING.md template for your open-source project.
Generate .gitignore files for any language or framework with a single click.
Generate a production-ready multi-stage Dockerfile by selecting base image, port, and entry command.
Validate docker-compose YAML syntax and check for common configuration issues.
Convert a cURL command to Python, JavaScript, Go, and PHP code.
Decode and inspect JSON Web Token header and payload.
Searchable reference of all HTTP status codes with descriptions.
Real-time collaborative estimation for agile teams. Create a room, share the link, pick cards, reveal together.
Parse cron expressions and see next execution times in plain English.
Calculate probability as fraction, decimal, percentage, and odds.
Convert rate limits between time windows and estimate monthly API costs.
FAQ
- How do I quickly choose the right open source license?
- The License Picker walks you through a decision tree: do you want to allow commercial use? Require attribution? Allow modifications under a different license? It recommends the most appropriate license (MIT, Apache 2.0, GPL, AGPL, etc.) and explains the implications of each clause.
- How can I compare two API schema versions to understand breaking changes?
- Use JSON Diff or YAML Diff to compare OpenAPI/Swagger spec files side by side. Changes to required fields, property types, and removed endpoints are highlighted clearly. This is useful in PR reviews for API changes to assess backward compatibility.
- How do I validate a JSON Schema document?
- JSON Schema Validator checks your schema definition against the JSON Schema specification and then validates a sample JSON document against it, showing all validation errors with path information. This is useful when defining API request/response schemas or MongoDB document validators.