All Developer Tools — TOOlover

• JSON Formatter — Pretty-print and format JSON with configurable indentation
• JSON Validator — Validate JSON syntax and structure with detailed error messages
• JSON Diff — Compare two JSON objects and highlight differences
• JSON to YAML — Convert JSON to YAML format
• YAML to JSON — Convert YAML to JSON format
• JSON Minifier — Remove all whitespace from JSON to minimize file size
• JSON Path Extractor — Extract values from JSON using dot notation paths
• JSON Tree Viewer — Visualize JSON structure as an expandable tree
• CSV to JSON — Convert CSV data to JSON array format
• JSON to CSV — Convert JSON array to CSV format
• XML to JSON — Convert XML to JSON format
• JSON Schema Validator — Validate JSON data against a JSON Schema (Draft 7)
• JSON Sample Generator — Generate sample JSON data from a JSON Schema
• JSON Query Tool — Query JSON data using JSONPath-like expressions
• Ruby Hash to JSON — Convert Ruby Hash syntax to valid JSON
• Excel to JSON — Convert Excel files to JSON with support for multiple sheets and complex structures
• Regex Tester — Test regex patterns with live matching and capture groups
• Cron Expression Parser — Explain cron expressions in plain English and preview the next 10 run times
• UUID Generator — Generate v1/v4 UUIDs, validate UUIDs, bulk generation
• URL Encoder/Decoder — Encode and decode URLs and query strings
• Base64 Encoder/Decoder — Encode and decode Base64 and Base64URL
• Duplicate Line Remover — Remove duplicate lines from text while preserving order
• Webhook Sender — Free online webhook sender tool to test HTTP endpoints. Send POST, GET, PUT, PATCH, and DELETE requests with custom JSON payloads, headers, and timeout options.
• Payload Generator — Generate realistic webhook payloads for Stripe, GitHub, and Shopify
• Webhook Receiver — Create temporary URLs to capture and inspect incoming webhooks
• HTML Entity Converter — Encode or decode HTML entities — escape special characters or convert entities back
• Time Converter — Convert between different time units
• Size Converter — Convert between different file size units
• Temperature Converter — Convert between Celsius, Fahrenheit, and Kelvin
• Number Base Converter — Convert numbers between binary, octal, decimal, and hexadecimal
• Color Converter — Convert colors between HEX, RGB, HSL, and named color formats
• JWT Decoder — Decode and inspect JWT tokens — header, payload, claims, and expiry status
• Hash Generator — Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes
• HMAC Generator — Generate and verify HMAC signatures for webhook verification
• Secret Key Generator — Generate secure random secrets for SESSION_SECRET, JWT_SECRET, AUTH_SECRET, HMAC, API tokens, and webhooks
• Bcrypt Playground — Hash passwords with bcrypt and verify hashes — adjust cost factor in the browser
• Certificate Inspector — Parse and inspect X.509 certificates — view subject, issuer, expiry, SANs, fingerprint
• Password Generator — Generate cryptographically secure passwords with entropy calculation
• Markdown Viewer — Convert markdown to HTML with real-time preview
• Words Counter — Count words, characters, sentences, and analyze text statistics
• Text Diff — Compare two texts and highlight differences line by line
• HTML Preview — Preview HTML in real-time with a sandboxed iframe renderer
• Case Converter — Convert text between camelCase, snake_case, kebab-case, UPPERCASE, lowercase, and more
• Find & Replace — Find and replace text with regex, case-sensitive, and whole word matching
• Text Sorter — Sort text lines ascending, descending, shuffle, or remove duplicates
• SEO Content Brief Prompt Generator — Create a detailed AI prompt for SEO content briefs with intent, audience, outline, entities, and SERP guidance.
• Blog Outline Prompt Generator — Generate a structured AI prompt for SEO-friendly blog outlines built around a keyword and audience.
• Search Intent Analysis Prompt Generator — Build a prompt that asks AI to classify search intent, audience needs, SERP expectations, and content angle.
• Keyword Cluster Prompt Generator — Create a prompt for grouping keyword lists into SEO clusters, pillar pages, supporting pages, and intent groups.
• Meta Title & Description Prompt Generator — Generate a prompt for writing SEO meta titles and descriptions with variants, intent fit, and character discipline.
• Content Refresh Prompt Generator — Create a prompt for refreshing old blog posts with new intent coverage, stronger sections, and SEO improvements.
• FAQ & People Also Ask Prompt Generator — Generate a prompt for finding FAQ and People Also Ask style questions for SEO articles.
• Kafka Message Flow — Visualize how producers, partitions, and consumers move messages through a Kafka topic
• Kafka Consumer Lag — Simulate consumer lag growth and recovery as produce/consume rates diverge
• Kafka Consumer Rebalance — Watch partition rebalancing across a consumer group as members join and leave
• Rate Limiters — Compare token bucket, leaky bucket, fixed window, and sliding window rate limiting
• Caching Simulator — Explore 5 cache strategies and 4 eviction policies with request-flow visualization
• Consistent Hashing — Visualize a hash ring, virtual nodes, and key distribution under topology change
• Uptime SLA — Calculate SLA targets, nines of availability, and allowed downtime per year
• Latency Simulator — Analyze p50, p95, and p99 latency percentiles and tail-latency distributions
• Consensus / Raft — Watch leader election, log replication, and quorum as nodes join, crash, and recover
• Circuit Breaker — See closed, open, and half-open states trip and recover as failures cross a threshold
• Load Balancer — Compare round-robin, least-connections, weighted, and random across backend nodes
• Queue / Backpressure — Push producers against a bounded buffer and watch drop, block, or overwrite under overload
• CAP Theorem — Visualize trade-offs between Consistency, Availability, and Partition Tolerance in distributed systems