💻Development Tools

Development tools for the small utilities that show up on every engineer's desktop and never feel important enough to install an app for: a strong password generator, a JSON validator and formatter with sane error messages, a JSON schema stripper for trimming a schema down to fit a model context window, a tokenizer for cost-estimating LLM prompts, a screen resolution simulator, a What-Is-My-IP analyzer, and a prompt chain tool for building multi-step model interactions. Everything runs client-side so the values you paste are not transmitted, which is the right answer for anything that contains keys, tokens, internal endpoints, or proprietary prompts. The common mistake when working with model context windows is counting words instead of tokens; the ratio differs by language and prompt style, and a long technical document can use 30 to 50 percent more tokens than its word count suggests, which is why the Token Calculator reports per-model token counts rather than a single average. If you are new to the category, start with the JSON Validator and Formatter for any malformed payload you need to debug, the Password Generator for any new credential, and the Token Calculator before sending a prompt that approaches a model's context limit. The Prompt Chain Tool is the right place to start when you are decomposing a single large prompt into a more reliable multi-step sequence.

7 tools available