Free DevOps tools that run in your browser
Practical utilities for engineers who automate, deploy and debug: explain a cron schedule,
plan a subnet, turn a docker run into Compose. Your
input stays on your device.
All tools
Scheduling & Automation
Schedule jobs and automate recurring work.
Networking
Plan address space and understand network ranges.
Containers & Kubernetes
Work with Docker, Compose and Kubernetes configuration.
- Docker Run to Docker Compose Converter Paste a docker run command and get a ready-to-use docker-compose.yml, with warnings for anything that does not translate.
- Kubernetes Resource Requests & Limits Calculator Work out pod CPU and memory requests and limits, the QoS class, total deployment footprint and how many pods fit on a node.
- Dockerfile Generator Generate production-ready Dockerfiles for Node, Python, Go, Java and static sites, with multi-stage builds and a matching .dockerignore.
Security & Encoding
Decode, encode and hash data safely in your browser.
Data & Formats
Convert and inspect structured data.
Developer Utilities
Small helpers for everyday development and operations.
- Chmod Calculator Convert between octal and symbolic Linux file permissions, set special bits and copy the chmod command.
- .gitignore Generator Combine templates for languages, frameworks, editors and operating systems into one clean .gitignore file.
- Regex Tester Test JavaScript regular expressions with live match highlighting, capture groups and a replace preview.
Why browser-based tools?
Configuration snippets, internal IP ranges and tokens are sensitive. Every tool here runs as JavaScript in your browser tab: there is no backend, nothing is uploaded and nothing is logged. Once a page has loaded you can even disconnect from the network and keep working.
Each tool is paired with a plain-language explanation, worked examples and the mistakes we see most often, so you understand the answer instead of just copying it.
Guides
Long-form explanations that go deeper than a tool page can.
-
How Cron Syntax Works: A Practical Guide
Learn how the five cron fields, wildcards, ranges and steps work, with real schedules, time zone pitfalls and debugging tips for crontab and Kubernetes.
-
Kubernetes Requests vs Limits
Master Kubernetes resource management. Learn how CPU and memory requests and limits work, QoS classes, OOMKilled errors, and sizing best practices.
-
Subnetting Explained for DevOps Engineers
Understand IPv4 subnetting, CIDR prefixes and usable hosts step by step, with VPC, Kubernetes and Docker examples and a quick mental-math method.