Loading page content
86 browser-based utilities for developers, AI practitioners, SEO professionals, and cloud engineers. No sign-up, no tracking. 85 of 86 run fully client-side; the Weather Widget queries the public Open-Meteo API.
Token Counter
Estimate tokens and API cost across 25 LLMs
AI Model Compare
Compare context, pricing, and capabilities
Prompt Templates
10 production-ready prompts across DevOps, SRE, Infrastructure, Development, and Career
System Prompt Builder
Visual builder with 8 modular sections, 5 persona templates, and live preview
AI API Request
Generate cURL/Python/JS/JSON for 5 providers
JSON Schema for AI
Build JSON schemas for function calling & structured output with 5 templates (extract contact, classify sentiment, parse resume, extract action items, API error)
AI Content Detector
Analyze text for 4 AI-generated patterns (sentence uniformity, AI buzzwords, passive voice, vocabulary diversity) with a likelihood score
AI Pricing Calculator
Estimate monthly AI API costs across 23 models from OpenAI, Anthropic, Google, DeepSeek, and more
Image Prompt Builder
Compose prompts for Midjourney, DALL-E, SD with subject, style, lighting, camera, mood, color
Fine-tuning Formatter
Convert CSV or manual rows to JSONL for OpenAI, Anthropic, and Together AI
Prompt Injection Scanner
Detect 18 injection patterns with 4-tier severity and 0-100 risk score
LLM Parameter Guide
Interactive guide to 6 sampling params with examples and provider matrix
Context Window Visualizer
Compare prompt fit across 10 LLMs (GPT, Claude, Gemini, Llama, Grok, DeepSeek)
AI Output Parser
Extract JSON, code blocks, markdown tables, and lists from AI output. Strip thinking tags.
Prompt A/B Comparator
Clarity and specificity scores, 5 quality signals, cost estimate, A/B winner
AI Resume Builder
Build tailored resumes from job descriptions and experience with 4 templates (Technical, Executive, Creative, ATS-Optimized) and keyword extraction
Meeting Summarizer
Extract attendees, topics, decisions, action items with owners, follow-ups, and duration
AI Tone Rewriter
Rewrite text in 6 tones: formal, casual, friendly, assertive, diplomatic, technical
i18n Scaffold Generator
Scaffolds for 4 frameworks (react-intl, next-intl, i18next, vue-i18n) and 15 languages
AI Data Extractor
Extract emails, URLs, phones, dates, IPs, currency, and hex colors from unstructured text
AI Code Reviewer
Static analysis for anti-patterns, security issues, and code smells across JavaScript/TypeScript, Python, Go, and Java
Git Commit & PR Writer
Conventional Commits (10 types) and PR descriptions from a git diff
AI Regex Builder
Describe what to match in English; library of 31 pre-built patterns across 14 categories (Contact, Web, Network, Date/Time, Finance, Security, Identifier, etc.)
API Docs Generator
Parse Express, FastAPI, or Go routes to Markdown or OpenAPI 3.0 YAML
AI SQL Assistant
Convert English to SQL (PostgreSQL, MySQL, SQLite) and explain SQL queries back in plain English
Document Q&A
Paste a document and find the top 5 relevant passages using TF-IDF ranking (no LLM required)
Automation Recipe Builder
Library of 22 recipes (cron, GitHub Actions, Lambda, shell, Terraform) with fuzzy match
AI Log Analyzer
Detect 12 production failure patterns (OOM, connection refused, DNS, TLS, 5xx, null reference, etc.) with root-cause suggestions
Prompt Eval Suite
Score prompts against 12 engineering best practices
AI Diagram Generator
Generate Mermaid diagrams (flowchart, sequence, ER, class, state, gantt) from descriptions with live preview
System Prompt Analyzer
Detect personas, 14 safety rails, 10 capabilities, and 12 tool references via regex
Vibe Coding Prompt Generator
Generate optimized prompts for 6 AI coding tools (Claude Code, Cursor, Windsurf, Replit, Lovable, Bolt)
AI Agent Cost Calculator
Compare LLM costs for AI agents across 10 models from 5 providers
Claude Code ROI Calculator
Calculate dollars saved, payback period, and token cost for Claude Code adoption
CLAUDE.md Generator
Generate a tuned CLAUDE.md for any repo with stack-aware defaults, hooks, MCP, and budget
MCP Server Config Builder
Build a valid .mcp.json with presets for filesystem, github, postgres, brave-search, and custom HTTP servers
Claude Code Hooks Builder
Pick from 7 hook recipes (rm -rf block, force-push block, terraform destroy guard, token budget, AWS profile guard, audit log, workflow confirm); output settings.json and shell scripts
OpenAI to Anthropic Migrator
Translate OpenAI SDK code to Anthropic SDK in Python or TypeScript with model mapping
AI Agent Loop Cost Predictor
Predict runaway-loop cost from iterations, tool calls, and caching hit rate
Tokenizer Comparator
Compare token counts and cost across Claude, GPT-5, and Gemini for the same prompt
CSS Gradient Generator
Build linear, radial, and conic CSS gradients with 10 curated presets (Sunset, Ocean, Purple Haze, Forest, Neon, Warm, Cool, Midnight, Aurora, Conic Rainbow)
Box Shadow Generator
Design multi-layer CSS box shadows with 8 presets (Subtle, Medium, Heavy, Neumorphism, Layered, Sharp, Glow, Inset) and live preview
Color Palette Generator
Generate color palettes using 6 harmony rules (complementary, analogous, triadic, tetradic, split-complementary, monochromatic) with tints and shades
Flexbox Playground
Live Flexbox builder with 5 presets (Navbar, Holy Grail, etc.) and CSS output
Image Compressor
Compress and resize images in JPEG, PNG, or WebP client-side via Canvas API with quality control
QR Code Generator
Generate QR codes for URLs, text, WiFi credentials, and email with PNG or SVG download
Code Screenshot
Create code screenshots with 7 themes (Dracula, Ocean, Sunset, Forest, Midnight, Candy, None), syntax highlighting for 16 languages, and macOS/Windows window chrome
Meta Tag Generator
SEO meta, Open Graph & X Card tags
Social Card Preview
Pixel-accurate OG card preview for X, Facebook, LinkedIn, and Slack
Robots.txt Generator
Build robots.txt with 5 presets including a Block AI Crawlers preset that blocks 15 AI bots (GPTBot, ClaudeBot, PerplexityBot, and more)
Color Contrast Checker
WCAG 2.1 AA and AAA ratio with 6 presets, color pickers, and swap
Privacy Policy Generator
Generate GDPR, CCPA, and UK GDPR compliant privacy policies
Weather Widget
Live weather conditions and hourly forecast for any city
JSON / YAML
Bidirectional JSON to/from YAML with nested objects, arrays, and multi-line strings
JSON Formatter
Format, minify, validate, and sort JSON; shows keys, depth, and size
YAML Validator
Validate K8s, GitHub Actions, and Compose YAML; converts to JSON
Base64
Encode and decode Base64 with full UTF-8 and emoji support
URL Encoder
Encode and decode URL strings (component or full URI)
JSON to TypeScript
Generate interfaces or type aliases with export toggle and nested types
CSV / JSON
CSV and JSON conversion in both directions, with comma, tab, semicolon, or pipe delimiters; RFC 4180 quoting
Code Formatter
Beautify and minify HTML, CSS, and JavaScript
SVG to JSX
SVG to React JSX/TSX with camelCase attrs, style objects, and props spread
HTML to Markdown
HTML to Markdown via Turndown with configurable heading, bullet, and code styles
Cron Builder
Visual builder, presets, and next 10 runs
Docker to Compose
docker run to docker-compose.yml v3.8 with 15 flag types
Subnet Calc
CIDR to network, broadcast, hosts, mask, wildcard, IP class
Chmod Calc
Numeric and symbolic Linux permissions with interactive grid
HTTP Status
Searchable reference for 30 common HTTP status codes across all 5 categories (1xx-5xx)
Diff Checker
Line or word diff, side-by-side or unified, with stats and copy
Regex Tester
Live JS regex match highlighting with capture groups and flag toggles
.gitignore Generator
Combine 23 templates across 6 categories (Languages, Frameworks, IDEs, OS, etc.)
SQL Formatter
Format and beautify SQL queries across 6 dialects (Standard SQL, MySQL, PostgreSQL, T-SQL, PL/SQL, BigQuery)
NAT Gateway Cost Calculator
Calculate AWS NAT Gateway monthly cost and compare against VPC endpoint alternatives
GitHub Actions Cost Calculator
Calculate monthly GitHub Actions spend including OS multipliers, matrix, and artifacts
Cron to English
Translate any cron expression to plain English with the next 10 run times in UTC
Postgres Index Recommender
Paste EXPLAIN ANALYZE output, get prioritized index suggestions with SQL
Timestamp
Unix to/from date with Local, UTC, ISO 8601, and relative time
String Utils
8 case conversions + 7 line ops (sort, dedupe, trim, number, etc.) with live counts
Markdown
Live editor with preview for headings, lists, code, tables, and links
README Generator
6 templates + 15 toggleable sections with live shields.io badges
Mock Data Generator
Generate realistic fake data with 22 field types and 4 preset schemas (Users, Products, Orders, Companies); export as JSON, CSV, SQL, or TypeScript
JSON Visualizer
Collapsible tree with search, expand slider, type coloring, and 8 stats
85 of 86 tools run entirely in your browser with nothing sent to any server. The Weather Widget queries the public Open-Meteo API.
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 X (Twitter) Card tags with real-time character counts. Preview how your content appears on X, 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. Generate realistic mock data as JSON, CSV, SQL, or TypeScript. Explore JSON with an interactive collapsible tree viewer.
Build CSS gradients visually with linear, radial, and conic support. Design multi-layer box shadows with neumorphism presets. Generate harmonious color palettes from any base color using 6 harmony rules (complementary, analogous, triadic, tetradic, split-complementary, monochromatic). Explore CSS flexbox properties with an interactive playground and live preview.
Generate QR codes for URLs, plain text, WiFi credentials, and email addresses with custom colors and PNG/SVG export. Compress and resize images entirely in your browser, your files never leave your machine. Create beautiful code screenshots with syntax highlighting, custom themes, and window chrome like Carbon and Ray.so.
Found these useful?
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