Built for developers,
by developers

DevOpsArsenal is a collection of 50 free 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.

50
Free Tools
0
Signups
0
Bytes Sent to Server
100%
Client-Side
∞
Free Forever

Our Principles

🔒

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.

⚡

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.

🎯

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.

🌐

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).

♿

Accessible

Semantic HTML5, ARIA labels, keyboard navigation, high-contrast Charming Seaside colour scheme. Responsive design tested on devices from 380px to 4K.

🔓

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.

Technology Stack

DevOpsArsenal is deliberately simple. No React, no Node.js, no build pipeline. Just the web platform as it was designed to be used.

HTML5CSS3 (Custom Properties)Vanilla JavaScript Web Crypto APICloudflare DNS-over-HTTPSipapi.co node-forge (SSL only)Cloudflare PagesRoboto + Roboto Mono

Tool Categories

🔒

Security (9)

JWT, Base64, Hashing, HMAC, Passwords, SSL, SSH Keys, Log Masking

🌐

Networking (5)

CIDR, DNS, IP Lookup, HTTP Reference, Port Reference

☁️

Cloud & DevOps (10)

K8s, Docker, Nginx, Git, Terraform, .env, Cron, Cloud Cost/Latency

🚨

SRE (4)

SLA Calculator, Incident Matrix, Rate Limits, Latency Percentiles

🔀

Data Formats (7)

YAML/JSON/TOML, Diff, JSONPath, cURL, SQL, CSV, JSON Formatter

🧰

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. The site is deployed as static files on Cloudflare Pages.
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 [email protected] with the tool name and what you expected to happen. We actively maintain all 50 tools and read every message — most bug reports get a fix shipped within a few days since there's no build pipeline or release process to wait on.

Project Timeline

May 2025
🚀 Launch — 50 Tools
Initial release with 50 fully functional tools across 6 categories. Charming Seaside design system. SEO and AI crawler optimized.
Ongoing
🛠️ Continuous Maintenance
Every tool is revisited as standards change — new HTTP status codes, updated cloud pricing, new cron syntax edge cases — and reader bug reports get fixed directly in the static HTML, no release cycle required.

How We Build and Test Each Tool

Every tool starts from a real problem someone hit at work — a JWT that needed decoding mid-incident, a CIDR range that needed splitting before a VPC peering request, a cron expression nobody on the team could parse at 2am. We build the tool against actual edge cases: malformed JWTs missing a segment, IPv6 CIDR blocks, cron strings with step values and ranges combined. Each tool is tested by hand against known-good and known-bad inputs before it ships, and the editorial content on each page is written by checking the underlying spec or RFC, not paraphrased from other sites.

Because nothing here touches a server, there's no database to migrate and no API to version — a tool that worked in 2025 keeps working exactly the same way today. The tradeoff is that anything requiring live external data (DNS resolution, IP geolocation, current cloud list prices) depends on the accuracy of the public API or dataset it queries, which we note explicitly on those specific tool pages.