DevOps, containers and config
Generate and lint Dockerfiles, validate Compose and Kubernetes YAML, diff Helm values and build GitHub Actions workflows. Write nginx, Caddy, systemd and launchd configs, schedule cron jobs, and keep environment files consistent across machines.
32 tools, free, in your browser
Dockerfile Generator
Generate a starter Dockerfile for Node, Python or Go with a slim or Alpine base image, a non-root user and your start command.
Developer utilities
Dockerfile Linter
Lint a Dockerfile with hadolint-style rules for latest tags, apt-get, root user, ADD vs COPY, cache order and HEALTHCHECK, with a score and fixes.
Developer utilities
Docker Compose Validator
Validate Docker Compose YAML for syntax errors, unknown keys, port and volume syntax, missing or circular depends_on, and undeclared networks.
Developer utilities
Kubernetes YAML Validator
Validate Kubernetes YAML for 14 kinds against an embedded schema: required fields, apiVersion, image tags, resource limits, probes, security context.
Developer utilities
Helm Values Diff
Diff Helm values.yaml for dev, staging and prod side by side as dotted paths, with added, removed and changed keys and which environments set each.
Developer utilities
GitHub Actions YAML Builder
Build GitHub Actions workflow YAML from a form, with Node, Python, Docker and Cloudflare Pages templates, matrix builds and cache steps.
Developer utilities
Nginx Config Generator
Generate nginx configurations for reverse proxy, SSL, static sites, and load balancers with security headers
Generators
Caddyfile Builder
Build a multi-site Caddy v2 Caddyfile with reverse_proxy, file_server, redir, header and tls, plus snippets, named matchers and dev or prod globals.
Generators
htaccess Generator
Generate an Apache .htaccess file with redirects, mod_rewrite rules, forced HTTPS, security headers, caching, compression and IP blocking.
Generators
Systemd Unit Builder
Build systemd .service, .timer and .socket unit files with ExecStart, User, Restart, Environment and hardening directives, validated before install.
Generators
launchd Plist Generator
Generate macOS launchd plist XML for LaunchAgents with KeepAlive, StartInterval or StartCalendarInterval schedules and the launchctl commands.
Generators
SSH Config Generator
Generate ~/.ssh/config Host blocks with ProxyJump, local, remote and dynamic port forwarding, identity files, presets and security warnings.
Developer utilities
Terraform HCL Formatter
Format Terraform HCL with terraform fmt-style indentation and aligned equals, and lint for hardcoded secrets, 0.0.0.0/0 rules and undeclared vars.
Formatters
Wrangler TOML Builder
Build a Cloudflare Workers config as wrangler.toml and wrangler.jsonc with KV, D1, R2, Durable Objects, Queues, Hyperdrive, routes, vars and crons.
Generators
Cron Expression Builder
APIBuild and validate cron expressions with plain-English descriptions, next-run previews and an optional seconds field. Also available as a REST API.
Developer utilities
Cron Expression Tester
Test 5- or 6-field cron expressions, see upcoming run times in your timezone, and turn phrases like 'weekdays at 9am' into cron.
Developer utilities
IP & Subnet Calculator
Calculate IPv4 subnets, CIDR ranges, network addresses, and host counts with a visual binary breakdown
Developer utilities
IPv6 Expander & Validator
Expand, compress and validate IPv6 addresses, including embedded IPv4, with hex and binary forms and the network and address count of a CIDR.
Developer utilities
DNS Lookup Parser
Parse dig answer lines into structured A, AAAA, CNAME, MX, TXT and NS records with host, TTL and value, and flag TTLs longer than 24 hours.
Developer utilities
chmod Calculator
Convert Unix permissions between numeric modes like 755 and symbolic rwx notation with a checkbox grid, setuid, setgid and sticky bits, and presets.
Developer utilities
ENV File Validator
Validate a .env file against .env.example and catch missing variables, empty values and type mismatches.
Developer utilities
Env File Manager
Parse, validate, edit, and convert .env files between JSON, YAML, Docker, and Shell formats
Developer utilities
Environment Variable Generator
Generate .env, .env.example and Markdown docs from Docker Compose files, Kubernetes manifests, a custom list or presets for eight frameworks.
Developer utilities
ENV Template Generator
Generate .env.example templates with secrets stripped, plus Markdown variable docs, from framework presets, Docker Compose or Kubernetes configs.
Developer utilities
YAML/JSON5 Config Validator
Validate YAML, JSON5 and JSON config files with line-numbered syntax errors, lint warnings such as tab indentation, and conversion between formats.
Developer utilities
TOML Editor & Converter
Validate TOML and convert it to JSON or YAML and back, for Cargo.toml, pyproject.toml and other config files.
Converters
OTel Trace Viewer
Visualize OpenTelemetry traces (OTLP JSON or Jaeger) as a waterfall flame graph with span attributes, errors, and per-service summaries.
Developer utilities
Trace Context Validator
Validate W3C traceparent and tracestate headers for distributed tracing correctness and propagation safety
Developer utilities
AWS ARN Parser
Split an AWS ARN into partition, service, region, account, resource type and ID, or build one from fields, with formats for 11 common services.
Developer utilities
DB Connection String Parser
Parse or build PostgreSQL, MySQL, MongoDB, Redis and SQL Server connection strings, with masked and URL-encoded variants and SSL and password checks.
Developer utilities
Shell Command Explainer
Explain a shell command part by part, covering commands, flags, pipes and redirects, and warn about risky patterns like rm -rf or curl piped to sh.
Developer utilities
System Design Simulator
Drag databases, caches, queues and load balancers onto a canvas, connect them, start from six templates, and export the design as PNG, SVG or JSON.
Developer utilities