Validate, format and generate Kubernetes, Kafka, Terraform and Redis config.

Free browser-based tools for the config files cloud work runs on: Kubernetes YAML, Kafka and Redis settings, Terraform, Docker and Compose, MCP servers, IAM and S3 policies, ARNs, CIDR blocks and cron. Paste a file, get the exact line that is wrong and why, in plain language. Everything runs in this tab: no account, no upload, nothing stored.

terraform kubernetes iam s3 arn cidr cron

Browse every tool on one page , or pick a platform below.

Kubernetes

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Kubernetes YAML Generator

Answer a few questions, get a manifest

Kubernetes YAML Validator

Is this YAML valid, and where is it wrong?

Kubernetes Rollout & Probe Timing

Restart loops, capacity dips and stuck drains
More kubernetes tools

Observability

OpenTelemetry Collector Config Validator

The exporter no pipeline references

PromQL Linter and Explainer

The queries that return the wrong number

Prometheus Relabel Config Tester

Which rule dropped the target

Kafka

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Kafka Confluent Wire Format Decoder

The five junk bytes in front of your payload

Kafka Key to Partition Mapper

Which partition does this key land on?

Kafka Topic Name Validator

Legal, risky, or 249 characters too long?
More kafka tools

Terraform

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Terraform Validator & Formatter

Does it parse, and is it formatted?

Terraform dynamic Block Generator

It is ingress.value, not each.value

Terraform check and precondition Generator

A failed check does not stop the apply
More terraform tools

CI and automation

GitHub Actions Workflow Linter

Who else can run code with your secrets

GitHub Actions Minutes and Cost Calculator

macOS is ten Linux minutes

Postgres

Postgres Connection Pool Calculator

work_mem is per sort, not per connection

Postgres EXPLAIN Plan Reader

Node times are per loop

Docker

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Docker Container Image Reference Parser

Is that a registry or a Docker Hub user?

Dockerfile Linter

What this image will do to you later

docker run to Kubernetes YAML

And the flags that have no equivalent
More docker tools

Redis

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Redis Hash Slot Calculator

Which of the 16,384 slots does this key land in?

Redis Hash Tag Tester

Will these keys survive a multi-key command?

Redis RESP Protocol Decoder

Read what the server actually sent
More redis tools

MCP

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MCP Server Config Generator

The config, and why yours does not start

MCP Server Config Validator

Why the server never came up

MCP Structured Output Validator

The contract only the server has to keep
More mcp tools

AI infrastructure

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LLM SSE Stream Decoder

Reassemble the message from the wire

LLM Tool Definition Converter

Anthropic, OpenAI and MCP, both ways

LLM JSON Schema Strict Mode Checker

What structured output will refuse
More ai infrastructure tools

Email and DNS

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SPF Record Checker

Ten lookups and it stops working

DMARC Record Checker

p=none protects nothing

DKIM Record Checker

An empty p is a revocation
More email and dns tools

Web security

CSP Evaluator

Does this policy actually stop anything?

CORS Preflight Explainer

Why the browser blocked it

AWS

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AWS IAM Policy Validator & Analyzer

Valid JSON? And what does it grant?

AWS IAM Policy Evaluator

Is this actually allowed?

AWS S3 Bucket Policy Analyzer

Is this bucket actually public?
More aws tools

Azure

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Azure Storage Account Security Analyzer

The key makes the rest advisory

Azure VM Size Decoder

No d means no temp disk

Azure Cosmos DB Throughput Calculator

Divided evenly, not by demand
More azure tools

Google Cloud

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GCP Storage Bucket Analyzer

Two access systems, one visible

GCP Signed URL Decoder

A bearer token in a URL

GCP Machine Type Decoder

The trailing letter is the architecture
More google cloud tools

Data formats

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JSON Validator & Formatter

Valid? And where exactly is it wrong?

YAML Validator

The line, the column, and the reason

YAML to JSON Converter

Either direction, and what it costs
More data formats tools

Encode & decode

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Base64 Encoder & Decoder

Both directions, UTF-8 done right

Unix Timestamp Converter

Seconds or milliseconds? It says which

JWT Decoder & Inspector

Read the claims, and what is wrong with them
More encode & decode tools

Cryptography

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Hash Generator

MD5 through SHA-512, and which to trust

Which Algorithm Should I Use?

The right one, and the wrong ones

Hash Identifier

Length narrows it. Nothing identifies it
More cryptography tools

Identifiers

UUID Generator

v4 for random, v7 for sortable

Networking & scheduling

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VPC Subnet & CIDR Calculator

How many hosts, and does it overlap?

Cron Expression Explainer

What it means, and when it next runs

VPC Subnet Planner

Lay out the whole VPC at once
More networking & scheduling tools

Cost & compliance

Cloud Waste Calculator

Estimate what you are burning

Cloud Tagging Policy Validator

The tags your cost report will be missing

Nothing is uploaded

Parsing and every rule run as JavaScript in this tab. There is no request carrying your input, no storage, and nothing to delete afterwards. Turn off your network and the tools still work.

No account, no email

No sign-up wall, no gated export, no "enter your work email to see your results". Copy the report or download it and go.

Generators check themselves

Every generator feeds its output back through the matching validator on this site and reports the result. Safe defaults are demonstrated in front of you rather than claimed.

From the blog

All posts
MCP

MCP error -32000 is not in the MCP specification

What -32000 Connection closed actually is, why it is an SDK code rather than a protocol one, why a single print statement causes most of them, and an ordered way to diagnose it instead of restarting the client again.

18 August 2026 MCP

MCP structured output is a contract, and most servers keep half of it

outputSchema, structuredContent and the backwards-compatibility rule nobody implements. What the specification actually requires, why isError is not a protocol error, and how to make a tool result a program can rely on.

18 August 2026 MCP

Your agent trusts the tool description, and that is the whole attack

MCP tool poisoning explained: which fields of a tool definition reach the model, why reading the description is not a review, why readOnlyHint proves nothing, and what actually reduces the risk once servers are already connected.

18 August 2026 MCP

Your MCP tools eat the context before any work starts

Tool definitions are a fixed cost on every request, not a one-off. Why agents degrade instead of failing when you connect too many servers, what the token arithmetic actually looks like, and the four ways to cut it.

18 August 2026

Where these come from

Every rule here comes from a specification, an upstream source or a published test vector rather than from received wisdom: Kafka's own generated ConfigDef data, the Avro and protobuf specifications, Kubernetes' deprecated API migration guide, RFC checksum vectors. Where a fact could not be checked against something external, the page says so rather than letting a confident tone imply it was. That distinction is the whole point: a tool reads a file, and a file describes what you meant to build rather than what is actually running.