Programming tools.
Encoders, regex, cron, schema converters and developer productivity utilities.
Free in-browser API testing tool (Postman alternative). Fire HTTP requests (GET, POST, PUT, DELETE, etc.) against any URL straight from your browser with custom headers and body.
Build a cron expression part-by-part, get a plain-English description, and preview the next five scheduled runs in your timezone. Handles ranges, lists, step values, and named days.
Convert raw git diff output to downloadable .patch files or compare code snippets to generate patches 100% client-side. Find common git diff commands.
Estimate monthly API cost for any LLM workload across Anthropic and OpenAI models. Includes prompt-cache and batch-API math so you see what you actually pay — not just the headline rate.