Categories

JSON is the default wire format for almost every API, config file and log pipeline, which means engineers spend a surprising amount of time reading it. These tools make that faster: pretty-print, validate with precise error positions, minify for transport, diff two payloads and convert to and from YAML.

• JSON Formatter
• JSON Validator
• JSON Diff
• JSON to YAML
• JSON Minifier
• YAML to JSON
• JSON Escape
• JSON Unescape

Everything you reach for while debugging an HTTP integration: decode a JWT to see what a provider actually issued, look up what a status code means in practice, check which headers are safe to rely on, and turn a request into a reproducible cURL command.

• JWT Decoder
• HTTP Status Code Lookup
• cURL Generator
• HTTP Header Reference

Encoding bugs are quiet bugs — a stray percent sign or an unescaped angle bracket breaks things far from where it was introduced. These converters run in your browser so you can safely round-trip values and see exactly what changed.

• Base64 Encoder
• Base64 Decoder
• URL Encoder
• URL Decoder
• HTML Encoder
• HTML Decoder

The general-purpose bench tools: generate identifiers and strong passwords, hash a value, translate an epoch timestamp into something human, and build a regular expression with live feedback on what it matches.

• Unix Timestamp Converter
• UUID Generator
• Hash Generator
• Regex Tester
• Password Generator
• XML Formatter
• Epoch Converter

Operational configuration is easy to get almost right, which is the worst kind of right. These tools let you build a cron schedule from a form and read an existing expression back in plain English, including the next times it fires.

• Cron Expression Generator
• Cron Expression Explainer

Long SQL is unreviewable SQL. Format a query into a consistent, diff-friendly shape, strip it back down for embedding in code, or turn INSERT statements into JSON rows for fixtures and tests.

• SQL Formatter
• SQL to JSON
• SQL Minifier

Subnet planning is arithmetic nobody should do by hand twice. Expand a CIDR block into its usable range, split a network into evenly sized subnets, and check whether two blocks overlap before you apply the change.

• CIDR Calculator
• Subnet Calculator

Generators and validators for the configuration that surrounds a deployment — Dockerfiles, Compose files, Kubernetes manifests and resource sizing.

Per-service cost calculators and, eventually, an interactive architecture estimator: assemble a load balancer, compute, database, cache and queue, then see what the month looks like before you build it.

Inspection tools for the security-adjacent artefacts engineers handle daily: certificates, keys, tokens and headers. Anything that touches a secret runs locally, in your browser, or not at all.

Capacity planning, error budgets, throughput, data-size conversions and the other back-of-the-envelope numbers that decide architecture arguments.