Kafka Message Size Calculator
Calculate Kafka message size, storage, bandwidth and optimal configuration. Compression, batching and replication.
kafka message size calculator
——— free developer tools
Calculators for platform engineers
Interactive tools for Kafka sizing, API design, and rate limiting. No signup. No paywalls.
14 tools live0 signups<1s to result
—— All tools
Kafka Consumer Lag Predictor
Predict when your consumer group will overflow. Size consumers and simulate failures before production incidents.
kafka consumer lag calculator
API Rate Limit Calculator
Optimal rate limits from traffic and consumers. Nginx, Kong, AWS snippets and IETF headers.
api rate limit calculator
API Versioning Decision Helper
Interactive SemVer: decide major, minor, or patch bumps with clear rationale for API changes.
api versioning
System Latency Budget Calculator
Build your architecture from reference hop latencies and see instantly if you fit your SLA — interactive latency numbers for engineers.
latency budget calculator
ReDoS Vulnerability Tester
Analyze JavaScript-style regex for catastrophic backtracking: scores from redos-detector, static heuristics, evil inputs, and bounded timing.
redos vulnerability tester
API Breaking Change Checker
Paste two JSON Schemas and instantly see which changes are breaking, which are safe, and why. No signup, no CLI.
api breaking change checker
PostgreSQL Connection Pool Sizer
Calculate the optimal max_connections, work_mem, and PgBouncer pool size for your PostgreSQL server. Get a ready-to-paste postgresql.conf snippet.
postgresql connection pool calculator
DORA Metrics Calculator
Calculate DORA tiers (Elite/High/Medium/Low) from 30/90-day numbers. Find your bottleneck and get a recommendation — no GitHub integration.
dora metrics calculator
Roast My Config
Paste your postgresql.conf and get client-side analysis and tuning recommendations instantly.
postgresql.conf analyzer
Incident Postmortem Calculator
Calculate the true business cost of an incident and generate a markdown postmortem template.
incident cost calculator
Redis Memory & Overhead Sizer
Calculate Redis RAM usage including metadata, pointers, maxmemory recommendations, and eviction configuration. Get a ready-to-paste redis.conf snippet.
redis memory sizer
K8s Pod/Node Capacity Planner
Calculate needed Nodes, kube-reserved tax, and bin-packing efficiency from CPU/RAM requests and cloud VM profiles. Support EKS, GKE, AKS, and Vanilla.
k8s capacity planner
Error Budget & SLA Tracker
Calculate allowed downtime, remaining error budget, and daily burn rate from target SLA and incidents. Get SRE policy recommendations for releases.
error budget tracker