
MockTurtle.net
JSON Generator
Dadroit JSON Viewer
JSON diff
Mockaroo
Insects API
Sheety
KiTTY
ThreadMine.dev
Build your custom JSON structure through our easy-to-use GUI or import an existing JSON schema. Then, sit back and let Mock Turtle generate thousands of random data based on your structure. It generates the data in real time as you build your tree structure. Plus, it's 100% free!
ThreadMine analyzes Java/JVM thread dumps in seconds. Upload or paste a dump (no signup, up to 10 MB) and get automatic detection of deadlocks, thread leaks, pool exhaustion, CPU hotspots and virtual thread pinning (Project Loom), plus a health score and a shareable report.
Parses HotSpot, OpenJ9, Zing and GraalVM. Paid plans add an AI assistant that explains the root cause and suggests a fix, multi-dump comparison/timeline, history, integrations and an API. A free, no-login web analyzer is the entry point โ the same low-friction flow as fastThread.io or jstack.review, but with automatic problem detection and AI on top.
Privacy: no account, TLS + AES-256, temporary dumps, zero AI-data retention.
MockTurtle.net
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JSON Generator - Create mock and sample JSON using a powerful template syntax
Dadroit JSON Viewer - Open a 1GB JSON file in a blink ๐ฃ
JSON diff - Compare 2 JSON and find difference
Mockaroo - A realistic data generator to test your app
Insects API - A JSON REST API for Insects
Sheety - Turn any Google sheet into an API instantly, for free. Power websites, apps, or whatever you like, all from a spreadsheet. Changes to your spreadsheet update your API in realtime. Neat