DevOps

Operational tooling: YAML linting, .env validation, Dockerfile linting, common config sanity checks.

All DevOps

• YAML Validator Validate and lint YAML against the spec. Catches duplicate keys and tab errors.
• CIDR / Subnet Calculator Parse CIDR notation, show network/broadcast/host range, subnet mask, IP count.
• HTTP Status Code Lookup Look up any HTTP status code with full meaning, category, and when to use it.
• Dockerfile Linter Lint a Dockerfile for common mistakes: missing version pins, root user, cache busters.
• .env Validator & Diff Validate .env files. Diff two .envs to spot drift between environments.
• Kubernetes Manifest Validator Validate K8s YAML manifests against the schema. Catches typos and missing fields.
• .editorconfig Generator Pick conventions and download a ready-to-commit .editorconfig file.
• .gitignore Generator Generate .gitignore from language/framework/editor templates. Combine multiple.
• .htaccess Generator Build .htaccess with redirects, HTTPS forcing, security headers, caching, gzip.
• nginx Config Generator Build common nginx blocks: SSL, reverse proxy, static site, security headers.
• .prettierrc Generator Build a .prettierrc with print width, tab width, semis, quotes, trailing commas.
• tsconfig.json Generator Build a strict, modern tsconfig.json for Node, bundlers, libraries, or Next.js.
• Webhook Request Builder Build a curl/fetch/Python webhook test request. Sign with HMAC-SHA256.
• HTTP Headers Explainer Paste a response header set; get explanation of each header and its security implications.
• HCL to JSON Converter Convert Terraform HCL2 to JSON for tooling or back-conversion. Browser-only.
• YAML Anchor / Alias Resolver Expand all YAML &anchors and *aliases to produce a fully de-aliased document.
• HTTP Cache-Control Decoder Decode and explain Cache-Control, Expires, ETag, and other HTTP cache headers.
• MAC Address Tools (Format, Vendor Lookup) Format / validate / normalise MAC addresses. Detect multicast, locally-administered. OUI vendor lookup.
• IP Address Tools (IPv4 / IPv6 Inspector) Parse, validate, expand, classify IPv4 and IPv6 addresses. Private / public / reserved detection.
• HTTP Request Builder (cURL, fetch, Python) Visually construct an HTTP request. Outputs cURL, fetch (JS), requests (Python), httpie commands.
• .env File Validator (Strict) Validate a .env file for syntax errors, duplicate keys, unsafe characters, missing quotes around special values.
• Lighthouse Score Interpreter Paste a Lighthouse JSON report. Get plain-English explanations of each metric and how to improve scores.
• Core Web Vitals Explainer (LCP, INP, CLS) Visual reference for Core Web Vitals thresholds. LCP, INP, CLS, FCP, TTFB explained with good / needs improvement / poor cutoffs.
• OAuth 2.0 Flow Visualizer (Auth Code + PKCE) Step-by-step OAuth 2.0 Authorization Code + PKCE flow visualizer. Build authorization URLs, parse callback redirects.
• Cron Next Runs (Show Next N Executions) Given a cron expression, list the next N runs in your timezone. Validates 5- and 6-field cron, including @daily / @hourly.
• GraphQL Introspection Viewer Paste a GraphQL introspection JSON response. Render the full schema as a navigable tree with type / field / argument details.
• chmod Calculator (Linux File Permissions) Visual chmod calculator. Click owner/group/other × read/write/execute checkboxes; get octal (755) and symbolic (rwxr-xr-x) representations.
• CORS Header Tester (Preflight Simulator) Test CORS configuration. Simulates browser preflight request; flags missing Access-Control-Allow-Origin / Methods / Headers.
• DNS Record Types Explained (A, AAAA, CNAME, MX, TXT, SPF) Searchable reference for every DNS record type. A, AAAA, CNAME, MX, TXT, SPF, DKIM, DMARC, CAA, SRV, NS, SOA, PTR with use cases.
• Kubernetes Manifest Validator (YAML) Validate Kubernetes YAML manifests for syntax + required fields. Checks Deployment, Service, ConfigMap, Secret, Ingress, Pod, more.
• docker-compose.yml Validator Validate docker-compose.yml structure + service definitions. Common pitfalls: depends_on without condition, version drift, network typos.
• OpenAPI 3 Spec Validator (Swagger) Validate an OpenAPI 3.0 / 3.1 spec (YAML or JSON). Checks structure, required fields, common pitfalls.
• Log Format Parser (Apache, Nginx, JSON, syslog) Parse common log formats into structured rows. Apache Common / Combined, Nginx default, JSON lines, RFC 5424 syslog.
• SSH ~/.ssh/config Generator (Visual) Visually build an ~/.ssh/config file. Host aliases, jump hosts (ProxyJump), key auth, ports.
• systemd Unit File Builder (.service) Visually build a systemd .service unit file. Type, ExecStart, restart policy, environment, security hardening.
• crontab Expression Helper (Build Visually) Visually build a crontab schedule. Pick minute / hour / day / month / weekday from dropdowns; preview next runs.
• Glob Pattern Tester (* ** ? [...]) Test glob patterns against filenames. Bash / git / .gitignore style. * matches anything, ** matches across slashes, [abc] character class.
• nginx Rewrite Rule Tester Test nginx rewrite / location / try_files rules against a request URL. Visual flag explanation.
• Webhook Payload Generator (Stripe, GitHub, Slack) Generate realistic test payloads for Stripe / GitHub / Slack / Discord webhooks. With matching signature.
• HTTP Status Code Cheat Sheet (1xx-5xx) Quick reference for every HTTP status code. When to use each, common mistakes, IANA category.
• Dockerfile ARG ↔ ENV Converter Convert between Dockerfile ARG (build-time) and ENV (runtime) directives. Helper for moving variables between scopes.
• Content Security Policy (CSP) Builder Visually build a Content-Security-Policy header. Per-directive controls, common preset templates.
• nginx Server Block Builder Generate an nginx server { } block from form inputs. Reverse proxy, static site, TLS termination presets.
• IPv4 Subnet Calculator (CIDR, Mask, Range) Calculate network, broadcast, hosts, mask from an IPv4 + CIDR. Inverse: get CIDR from mask.
• Browserslist Query Checker (caniuse / Autoprefixer) Test a Browserslist query ('> 1%, last 2 versions'). See which browsers match and global usage %.
• Chrome Extension Manifest V3 Builder Visually build a manifest.json for a Chrome / Edge / Firefox extension. MV3 schema, permissions, service worker, action.
• Natural Language to Cron Expression Convert phrases like "every Monday at 9am" to a valid cron expression. Handles minute / hour / day / weekday / month patterns.
• CIDR to IP Range (and Back) Convert CIDR notation (10.0.0.0/8) to first / last IPs. Reverse: convert IP range to minimum CIDR set.
• GitHub Pages 301 Redirect HTML Builder Generate the meta-refresh + JS HTML snippet for a GitHub Pages redirect. Multiple paths supported.
• Terraform tfvars to JSON Converter Convert a Terraform .tfvars (HCL) variable file to .tfvars.json and back — strings, numbers, bools, lists, and maps.
• GitHub Actions Workflow Validator Validate a GitHub Actions workflow YAML — triggers, jobs, steps, runs-on, and common mistakes — in your browser.
• .dockerignore Generator Generate a .dockerignore from language and framework presets to shrink the build context and speed up docker build.
• CODEOWNERS File Generator Build a GitHub or GitLab CODEOWNERS file from path patterns and owners, with validation and correct ordering.
• Renovate Config Generator Generate a renovate.json for Renovate Bot — schedule, automerge, grouping, labels, and package rules.
• AWS Cron Expression Generator Build and explain AWS EventBridge and CloudWatch cron() and rate() schedule expressions, including ?, L, W, and #.
• Ansible Playbook Generator Scaffold an Ansible playbook YAML from hosts, become, variables, and common task modules — copy and run.
• Dockerfile Generator Generate a production-ready Dockerfile for Node, Python, Go, Rust, Java, PHP, or static sites — multi-stage, non-root, with a healthcheck.
• Docker Compose Generator Build a docker-compose.yml with your app plus Postgres, MySQL, Redis, Mongo, or Nginx — ports, volumes, env, and healthchecks.
• Helm Chart Generator Scaffold a Helm chart — Chart.yaml, values.yaml, deployment, service, and optional ingress — from a few fields.
• Kubernetes Manifest Generator Generate a Kubernetes Deployment, Service, and optional Ingress and ConfigMap YAML with resource limits and probes.
• Kubernetes Resource Calculator Size Kubernetes CPU and memory requests and limits across replicas and work out how many nodes a workload needs.
• AWS IAM Policy Generator Build an AWS IAM policy JSON from services, actions, resource ARNs, and conditions — least-privilege, ready to paste.
• S3 Bucket Policy Generator Generate an S3 bucket policy for common cases — public read, CloudFront OAC, SSL-only, IP allow-list, and cross-account.
• CloudFormation Template Generator Scaffold an AWS CloudFormation template in YAML or JSON with S3, DynamoDB, Lambda, SQS, and SNS resources and parameters.
• GitLab CI Generator Generate a .gitlab-ci.yml with build, test, lint, and deploy stages for Node, Python, Go, and more — cache and artifacts included.
• GitHub Actions Workflow Generator Generate a GitHub Actions CI workflow YAML — triggers, a version matrix, and install, lint, test, and build steps.
• Terraform Graph Visualizer Paste Terraform HCL and see the resource dependency graph — resources, references, and edges rendered as a diagram, in your browser.
• Dependabot Config Generator Generate a .github/dependabot.yml for npm, pip, Docker, Actions, Go, Maven, Composer, and more — schedule, limits, and reviewers.
• Prometheus Alert Rule Generator Build Prometheus alerting rules YAML from presets — high CPU, memory, disk, latency, error rate, and instance-down — with editable thresholds.
• Logrotate Config Generator Generate a logrotate configuration block — rotation frequency, retention count, compression, size triggers, create vs copytruncate and pre/post-rotate scripts — ready for /etc/logrotate.d/.
• Supervisor (supervisord) Config Generator Generate a Supervisor program section — command, working directory, user, numprocs, autostart and autorestart, environment, stop signal and logging — for /etc/supervisor/conf.d/.
• PM2 Ecosystem Config Generator Generate a PM2 ecosystem.config.js — app name, script, fork vs cluster mode, instances, watch, max_memory_restart, environment variables and cron restart.
• .gitattributes Generator Generate a .gitattributes file — line-ending normalization, forced LF or CRLF, binary markers, Git LFS tracking, GitHub Linguist overrides, diff drivers and export-ignore.
• Nginx Rate Limit Config Generator Generate nginx rate-limiting config — limit_req_zone and limit_req with burst and nodelay, optional connection limiting, custom key, memory zone size and status code.
• Quartz Cron Expression Validator Validate and explain a Quartz cron expression — 6 or 7 fields from seconds to year, the ? L W and # special characters, named months and weekdays, and a plain-English breakdown of every field.
• Cron Dialect Converter Convert a cron expression between Unix crontab, Quartz, Spring and AWS EventBridge — remapping day-of-week numbering, adding or dropping the seconds and year fields, and applying the ? rule.
• Terraform State (tfstate) Viewer Inspect a Terraform state file — summary metrics, resource addresses grouped by module, notable attributes per resource, provider list and outputs, with sensitive outputs hidden.
• Kustomize Build Preview Preview common Kustomize transformers — namePrefix and nameSuffix, namespace, commonLabels and annotations, image name/tag/digest overrides and replica counts — applied to your base manifests.
• CAA Record Generator Generate CAA DNS records that pin which certificate authorities may issue for your domain — issue, issuewild and iodef — to block mis-issuance.
• DNS TTL Calculator Translate DNS TTL seconds into plain durations, and plan a migration: how long before a record change fully propagates and when to lower TTL ahead of a cutover.
• AWS ARN Parser & Builder Parse an AWS ARN into partition, service, region, account and resource — and build one from the parts — so you stop hand-editing IAM and resource ARNs.
• Git Branch Name Generator Generate a clean, conventional Git branch name from a ticket and description — type/scope, kebab-case, length-capped — matching feature/ and fix/ conventions.
• Bash getopts Generator Generate a Bash getopts argument-parsing block from the flags you define — short options, required arguments and a usage() — ready to paste into a script.
• kubectl Command Builder Build a kubectl command from a form — verb, resource, namespace, selector and output — for the get / describe / logs / scale calls you can never quite remember.
• S3 URI / URL / ARN Converter Convert between the three ways to point at an S3 object — s3:// URI, https:// URL and ARN — and pull out bucket, key and region.
• Linux Signal Reference Look up Linux signals — SIGTERM, SIGKILL, SIGHUP, SIGINT and the rest — with the number, default action and when to send each. Searchable.
• Unix Exit Code Reference Look up Unix and Linux exit codes — what 1, 2, 126, 127, 128+n and 130 mean, and how a signal maps to 128+signal — to decode a failing command or CI step.
• Makefile Generator Generate a Makefile from the tasks you list — .PHONY targets, variables and a help target — so a project gets make build / test / run without the tab-vs-space pain.
• find Command Builder Build a find command from a form — name pattern, type, size, mtime and -exec — and get the exact syntax instead of guessing the predicates.
• grep / ripgrep Command Builder Build a grep or ripgrep command from a form — pattern, recursion, ignore-case, context lines and file globs — with the right flags for each tool.
• .gitconfig Generator Generate a ~/.gitconfig — user identity, sensible defaults, aliases, pull and rebase and line-ending settings — to drop onto a fresh machine.
• rsync Command Builder Build an rsync command from a form — archive, delete, exclude, compression, dry-run and SSH — and understand exactly what the flags will do before it runs.
• dig Command Builder Build a dig command — record type, @resolver, +short or +trace and reverse lookup — for the DNS query you need without memorizing the options.
• Justfile / Taskfile Generator Generate a justfile or Taskfile from your tasks — recipes, variables and dependencies — a friendlier task runner than Make.
• AWS IAM Policy Explainer Paste an AWS IAM policy JSON and get a plain-English explanation — who can do what to which resources, and which statements are dangerously broad (Action: *, Resource: *).
• ANSI Color Code Generator Build ANSI escape codes for colored terminal output — foreground, background, bold and underline — with a live preview and copy-ready sequences for bash, Python or Node.
• scp Command Builder Build an scp command from a form — local and remote paths, port, recursive and identity file — with the right ordering and quoting for the copy you want.
• TCP/UDP Port Number Reference Look up TCP and UDP port numbers — what runs on 22, 80, 443, 3306, 5432, 6379, 8080 — and search by port or by service. The well-known and common dev ports.
• Dotenv (.env) Viewer View a .env file as a clean key/value table — parses quotes, export prefixes and comments, and flags values that look like secrets. Parsed in your browser.
• JUnit XML Viewer Open a JUnit or xUnit XML test report and read it as a pass/fail tree with per-test timings and failure messages. Parsed entirely in your browser.