DevOpsArsenal gives you everything you need as a DevOps engineer, cloud architect, or software developer — JWT decoders, CIDR calculators, cron explainers, Kubernetes validators and more. All tools run 100% in your browser. NO DATA COLLECTED AT ALL.
An open-source, zero-dependency CLI that runs a 744B-parameter model on ~25GB RAM by streaming experts from disk — no GPU required.
Jul 25, 2026"Just hash it with SHA-256" is bad advice for passwords. A practical decision table for checksums, HMACs, and password storage.
Jun 29, 2026Every cron field explained, the special characters that trip people up, and 10 real-world cron expressions decoded.
Jun 29, 2026The most common way developers expose secrets is a Git commit. Covers gitignore rules, startup validation, and secret managers.
Jun 8, 2026Compare 100+ DevOps tools across 14 categories — CI/CD, Cloud, Infrastructure as Code, Containers, Monitoring, Databases and more. Side-by-side feature, pricing and free tier comparison.
Select any tools to compare features, pricing, free tiers, pros and cons. Covers CI/CD (GitHub Actions vs Jenkins vs GitLab), Cloud (AWS vs Azure vs GCP), IaC (Terraform vs Pulumi), Containers, Monitoring and more.
Validate Kubernetes manifests, generate Dockerfiles, create .gitignore files, lint configs and more.
Validate Kubernetes manifests for syntax, required fields, image tags and security best practices.
Generate production Dockerfiles with multi-stage builds for Node, Python, Go, Java, Rust and more.
Select languages, frameworks, IDEs and tools to generate a comprehensive .gitignore file.
Lint .env files — detect duplicates, syntax errors, exposed secrets and infer value types.
Translate cron expressions to plain English. Shows next 10 scheduled runs with exact times.
Compare VM costs across AWS, Azure and GCP by CPU, RAM, region and commitment type.
Build AWS CLI, gcloud and Azure CLI commands visually — pick service, action and params, copy the command.
Format, validate and explore JSON with pretty printing, tree view and error detection.
Format messy SQL queries with proper indentation, keyword uppercasing and highlighting.
Convert CSV to JSON arrays/objects and JSON arrays back to CSV with custom delimiters.
Generate production Nginx configs for reverse proxy, SSL, gzip, rate limiting and WebSocket.
Validate commit messages against Conventional Commits format — feat, fix, chore, docs.
Paste terraform plan output to see color-coded resource additions, changes and deletions.
Calculate subnets, look up DNS records, inspect IPs, reference ports and HTTP status codes.
Calculate subnet details — network address, broadcast, usable hosts, mask and subnet splitter.
Query A, AAAA, CNAME, MX, TXT, NS, SOA and CAA records via Cloudflare DNS-over-HTTPS.
Look up any IP to find country, city, ASN, ISP and timezone. Auto-detects your public IP.
Searchable reference for all HTTP status codes (1xx–5xx) and common request/response headers.
200+ well-known TCP/UDP ports — searchable, filterable by category and protocol.
Regex testing, UUID generation, timestamp conversion, text transformation, word counting and more.
Test regular expressions with live highlighting, capture groups and an inline cheatsheet.
Generate UUID v4 identifiers — bulk up to 1000, list/JSON/SQL output formats.
Live clock with timestamp ↔ date conversion in ISO 8601, RFC 2822 and UTC formats.
Convert between camelCase, snake_case, kebab-case, PascalCase, SCREAMING_SNAKE and more.
Count words, characters, sentences. Estimate LLM tokens for GPT-4, Claude and Gemini.
Remove duplicate lines, sort, trim, reverse, number and clean up text lists.
Format, beautify and validate XML instantly — pretty-print with custom indentation or minify for production.
Live preview for Mermaid diagrams — flowcharts, sequence, Gantt, ER and Git graphs. Export as SVG or PNG.
Interactive Unix file permissions calculator — toggle bits or enter octal values.
Encode and decode URLs with percent-encoding. Handles query strings and special characters.
Encode and decode HTML entities — handles named and numeric entities for safe HTML output.
Convert between HEX, RGB, HSL with live preview, sliders and Tailwind CSS palette matching.
Convert a list of Unix timestamps or dates in bulk — paste multiple values at once.
Searchable library of 100+ tested regex patterns for email, URL, IP, phone and dates.
Browse and copy curated AI prompt templates for coding, writing, analysis and DevOps tasks.
Interactive decision tree to find the right HTTP status code for your API response.
Decode tokens, generate passwords, inspect certificates, hash data and mask sensitive information.
Decode JSON Web Tokens — view header, payload, expiry and signature algorithm instantly.
Encode and decode Base64 strings. Includes Kubernetes Secret YAML mode.
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from text or files using Web Crypto API.
Generate and verify HMAC-SHA256/512 signatures. Webhook presets for GitHub, Stripe, Slack.
Analyse entropy, crack time across 5 attack scenarios, pattern detection and improvement tips.
Paste PEM certificates to decode issuer, SANs, expiry, fingerprint and key info.
Detect and redact emails, IPs, API keys, tokens, passwords and custom patterns from logs.
Generate RSA key pairs in your browser using Web Crypto API. Keys never leave your device.
Calculate SLAs, classify incidents, plan rate limits and manage on-call responses.
Calculate allowed downtime per day/week/month/year and composite multi-service SLA availability.
Classify incidents by impact × urgency. Get SEV level, response SLA and comms templates.
Calculate burst headroom, safe RPS and retry-after timing from any rate limit policy.
Enter response times to calculate P50, P90, P95, P99 percentiles with histogram.
Convert between YAML, JSON, TOML. Diff text, query JSON paths and convert curl commands to code.
Convert between YAML, JSON and TOML in any direction with pretty print and key sorting.
Compare two texts side-by-side with line-by-line and word-level diff highlighting.
Query JSON with dot notation, JSONPath or jq-style expressions. Live results with cheatsheet.
Convert curl commands to Python, JavaScript, Go, PHP and Ruby with full header and auth support.
DevOpsArsenal is a collection of free, open-source tools that run entirely in your browser. No data is ever sent to a server. No signup, no tracking, no nonsense.
Every tool is a single-file HTML page with embedded JavaScript — no build step, no npm install, no framework. Just open and use.
All processing happens in your browser. Your data never leaves your device.
No frameworks, no build step. Average page is 20KB — loads in milliseconds.
Static HTML files work offline once cached. Save any tool page locally.
Semantic HTML5, ARIA labels, keyboard navigation and high-contrast design.