Useful tools,
all in one place.
Developer workflow, data and API, encoding, security, automation, and cloud-native utilities — mostly browser-local.
Recent and saved tools
Developer workflow
Compare, test, inspect, and generate everyday development data.
Developer Data Pipeline
Build a reusable browser-local workflow such as Base64 decode → JSON format → JSONPath extract, then run it in one click.
Runs locally ↗DeveloperWebSocket Online Tester
Connect to ws:// or wss:// endpoints directly from your browser, send text or JSON messages, and inspect timestamped events.
Runs locallyData & formats
Work with JSON, YAML, SQL, schemas, and structured documents.
CSV to JSON & JSON to CSV Converter
Convert CSV, TSV, or semicolon-delimited tables to JSON and JSON arrays back to CSV with delimiter, header, and pretty-print controls.
Runs locally ↗DataJSON Diff & Semantic Compare
Compare two JSON documents by path and find added, removed, changed, and type-mismatched values without uploading data.
Runs locally ↗DataJSON Formatter, Minifier & Validator
Format, minify, and validate JSON with useful line and column errors. Your data stays entirely in this browser.
Runs locally ↗DataJSON Schema Validator
Validate JSON against common Draft 2020-12 schema keywords and see every issue by data path. Runs locally in your browser.
Runs locally ↗DataJSON to Go, TypeScript, Java & Python Types
Generate Go structs, TypeScript interfaces, Java records, or Python dataclasses from sample JSON entirely in your browser.
Runs locally ↗DataJSONPath Tester & Query Evaluator
Evaluate practical JSONPath expressions, inspect matched paths and values, and copy results without sending JSON to a server.
Runs locally ↗DataYAML to JSON Converter
Convert common YAML documents to JSON and JSON back to readable YAML without uploading configuration data.
Runs locally ↗DataJSONL / NDJSON Viewer & Filter
Inspect newline-delimited JSON logs, filter records by text or field, find malformed lines, and export valid records without losing numeric precision.
Runs locally