Tool tutorials

Each tutorial solves one real problem with one of myfree browser tools: what to paste, what you get back, and what to watch out for.

• How to fix invalid JSON from an LLM
  Fix invalid JSON from an LLM in the browser. Repair code fences, trailing commas, comments, single quotes, and cut-off brackets, then copy the valid JSON.
  Tool: JSON Repair
• How to compare two JSON objects
  Compare two JSON objects in the browser and see every added, removed, changed, or moved field by path. Key order and indentation are ignored.
  Tool: JSON Diff
• How to compare .env files
  Compare a .env file with .env.example in the browser. Find missing keys, extra keys, empty values, and repeated keys before you deploy.
  Tool: .env Diff
• How to convert a cURL command to JavaScript fetch
  Turn a cURL command from API docs into JavaScript fetch code with a free converter, then fix what curl does differently: content types, CORS and cookies.
  Tool: cURL to Code
• How to convert a docker run command to Docker Compose
  Turn a docker run command into a compose.yaml file with a free converter, then fix the parts that need you: named volumes, secrets, networks and limits.
  Tool: Docker Run to Compose Converter
• How to count tokens in a prompt
  Count the tokens in a prompt with a free browser tokenizer, see why the same text gives different counts, and count tokens in your own JavaScript code.
  Tool: LLM Tokenizer Visualizer