Agentmemory
ChainMemory
OpenMemory MCP
Memori
Pieces for Developers
cognee
Claiv Memory
TheSecondBrain.dev
space4.dev
JSONFormatter.org
JSONLint
space4.dev is a free collection of 70+ developer tools built for speed and privacy. It covers JSON formatting, validation, and conversion (to YAML, XML, CSV, TypeScript, Java, C#, and more), Base64/URL/HTML/Unicode encoding and decoding, JWT decoding and inspection, Unix timestamp conversion, cron expression parsing and generation, and OpenAPI/Swagger viewing, validation, and diffing.
Every tool runs 100% client-side in the browser โ nothing you paste or upload is ever sent to a server. That makes it safe to use with sensitive data like auth tokens, API responses, or internal config files, which most competing tool sites don't guarantee.
No signup, no ads, and no account walls โ each tool has its own dedicated, fast-loading page so you can jump straight to what you need instead of digging through a cluttered all-in-one dashboard.
Agentmemory
space4.devNo features have been listed yet.
ChainMemory - Portable, verifiable memory for AI agents โ works across ChatGPT, Claude, Gemini and any MCP client
JSONFormatter.org - Online JSON Formatter and JSON Validator will format JSON data, and helps to validate, convert JSON to XML, JSON to CSV. Save and Share JSON
OpenMemory MCP - Your private, local memory layer for all AI tools
JSONLint - JSON Lint is a web based validator and reformatter for JSON, a lightweight data-interchange format.
Memori - Persistent memory from agent trace, not just conversation
Pieces for Developers - Centralized code snippet manager to streamline your workflow