41 browser-based utilities for developers, AI practitioners, SEO professionals, and cloud engineers. No sign-up, no tracking, no data leaves your machine.
All tools run entirely in your browser. Nothing is sent to any server.
Every tool on this page was built for the workflows DevOps engineers, cloud architects, SREs, and AI practitioners encounter daily: building system prompts, estimating LLM token costs, generating API requests, debugging JSON payloads, calculating subnets, or decoding JWTs. Unlike most online tools, these run entirely in your browser. Your sensitive tokens, prompts, and config data never touch a server.
Scan prompts for 18 injection attack patterns. Format training data to JSONL for OpenAI, Anthropic, and Together AI fine-tuning. Visualize how prompts fill each model's context window across 10 LLMs. Interactive parameter guide for temperature, top_p, top_k, and penalties. Parse and clean raw AI output: extract JSON, strip thinking tags, convert tables. Compare prompts A/B with quality scores. Plus: AI content detector, pricing calculator, system prompt builder, image prompt builder, and more.
Generate complete SEO meta tags, Open Graph tags, and Twitter Card tags with real-time character counts. Preview how your content appears on X/Twitter, Facebook, LinkedIn, and Slack before publishing. Build robots.txt files with presets including AI crawler blocking. Check color contrast against WCAG AA/AAA standards.
Convert JSON to YAML (and back) for Kubernetes manifests, Ansible playbooks, and CI/CD configs. Convert JSON to TypeScript interfaces instantly. Convert CSV to JSON and JSON to CSV with custom delimiters. Validate YAML syntax. Format, minify, and sort JSON. Encode/decode Base64 and URL-encode query parameters.
Build cron expressions visually with a field-by-field builder and see the next 10 runs. Convert docker run commands to docker-compose.yml instantly. Calculate subnets from CIDR notation. Convert Linux chmod permissions. Look up HTTP status codes for API debugging. Compare configs with a pro-grade side-by-side diff checker.
Decode JWT tokens to inspect auth claims without exposing them to third-party services. Generate SHA-256/384/512 hashes for file integrity checks. Create UUID v4, ULID, or NanoID identifiers. Generate cryptographically secure passwords and API keys with strength meters.
Convert between naming conventions: camelCase, snake_case, kebab-case, PascalCase, and more. Sort, deduplicate, and number lines. Test regex patterns with live match visualization. Convert Unix timestamps for log analysis. Preview Markdown for documentation and README files.
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These tools are free and always will be. If they saved you time, the best way to say thanks is to share them with a colleague or give a star on GitHub.
Built with care by Hammad Haqqani, DevOps Architect & Cloud Engineer