Math & Numbers
Calculate logarithms with any valid base, with optional log10, log2, and natural-log comparisons
logarithm-calculatorDeveloper Tools
Visualize JSON or JSONL as an expandable tree and copy JSONPath expressions for every node
json-path-visualizerMath & Numbers
Solve common percentage questions including percentage of a total, value from a percentage, and percentage change
math-percentage-calculatorDevelopment
Convert structured service logs into Mermaid or PlantUML sequence diagrams, with optional latency and error annotations
log-sequence-diagram-converterSecurity
Decode JWT header and payload, verify HS256 or RS256 signatures, and flag algorithm, expiry, and sensitive-claim security risks
jwt-decoder-security-auditorData Processing
Preview JSONata-style queries and transformations, compare results across sample payloads, and export the transformed output as JSON, CSV, YAML, or Markdown
jsonata-query-transform-studioMath & Numbers
Convert kilometers per hour to miles per hour with configurable decimal precision
kmh-to-mphDevelopment
Query arbitrary JSON with JSONPath expressions, preview matches, switch output modes, and save reusable query templates
jsonpath-query-toolData Processing
Query JSON with JSONPath or JMESPath-style expressions, inspect matched paths, and highlight extracted values in the original document
json-path-extractorMath & Numbers
Convert kilometers to miles with configurable decimal precision
km-to-milesDevelopment
Convert JSON Schema JSON/YAML definitions into ready-to-use Zod schemas with nested objects, arrays, enums, and common validation rules
json-schema-to-zod-schema-converterMath & Numbers
Convert kilograms to pounds with configurable decimal precision
kg-to-lb