Built for developers,
by developers
DevOpsArsenal is a collection of 50 free, open-source tools that run entirely in your browser. No data is ever sent to a server. No signup, no tracking, no nonsense — just tools that work.
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Privacy First
Every tool runs 100% in your browser. Your JWT tokens, passwords, API keys and config files never leave your device. No analytics beyond basic page views. No fingerprinting.
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Instant & Fast
No frameworks, no build step, no loading spinners. Average page size is 20KB of HTML — pages load in under 200ms on any connection. Works offline once cached.
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One Job, Done Well
Each tool does one thing and does it properly. No feature bloat, no upsells. You paste input, you get output. Copy and move on with your day.
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No Lock-In
Every tool is a single HTML file. Right-click → Save As → use it forever, on any machine, behind any firewall, on an airplane. No internet required (except DNS and IP lookup).
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Accessible
Semantic HTML5, ARIA labels, keyboard navigation, high-contrast Charming Seaside colour scheme. Responsive design tested on devices from 380px to 4K.
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Transparent
View the source of any tool — it's all there in readable JavaScript. No obfuscated code, no hidden network calls. We use the browser's native Web Crypto API for all cryptographic operations.
DevOpsArsenal is deliberately simple. No React, no Node.js, no build pipeline. Just the web platform as it was designed to be used.
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Security (9)
JWT, Base64, Hashing, HMAC, Passwords, SSL, SSH Keys, Log Masking
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Networking (5)
CIDR, DNS, IP Lookup, HTTP Reference, Port Reference
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Cloud & DevOps (10)
K8s, Docker, Nginx, Git, Terraform, .env, Cron, Cloud Cost/Latency
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SRE (4)
SLA Calculator, Incident Matrix, Rate Limits, Latency Percentiles
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Data Formats (7)
YAML/JSON/TOML, Diff, JSONPath, cURL, SQL, CSV, JSON Formatter
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Utilities (15)
Regex, UUID, Timestamps, Text Case, Markdown, Colors, AI Prompts and more
Frequently Asked Questions
Is DevOpsArsenal really free?▼
Yes, completely free. All 50 tools are available without signup, payment or any restrictions. We sustain the site through non-intrusive advertising.
Is my data safe?▼
All tools run 100% in your browser using JavaScript. Your data never leaves your device — nothing is sent to any server. You can verify this by checking the network tab in your browser's developer tools. We use the Web Crypto API for all cryptographic operations (hashing, HMAC, key generation), not any custom implementation.
Can I use DevOpsArsenal offline?▼
Yes. Since all tools are static HTML files with embedded JavaScript, you can save any page locally (Ctrl+S) and use it offline forever. The only exceptions are DNS Lookup and IP Lookup which need internet to query external APIs (Cloudflare DoH and ipapi.co).
What technologies does DevOpsArsenal use?▼
Pure HTML, CSS and vanilla JavaScript — no React, no Vue, no frameworks, no build step, no npm install. Cryptographic operations use the browser's native Web Crypto API (crypto.subtle). The only external dependency is forge.js for X.509 certificate parsing in the SSL Inspector. Hosted on Netlify CDN for fast global delivery.
How accurate are the token estimates?▼
The Word & Token Counter uses a ~4 characters per token heuristic, which is approximately correct for English text. Actual token counts vary by model and tokenizer. For exact counts, use OpenAI's tiktoken, Anthropic's token counter, or the model provider's official API.
How accurate are the cloud cost estimates?▼
The Cloud Cost Estimator uses publicly available list prices (2025) for rough comparison. Actual costs vary significantly based on reserved instances, savings plans, enterprise discounts, region and usage patterns. Always use the official AWS, Azure or GCP pricing calculators before making purchasing decisions.
How do I report a bug or suggest a feature?▼
Email us at hello@devopsarsenal.com or open an issue on our GitHub repository. We actively maintain all 50 tools and welcome community contributions and feedback.