`*` means every value, `/` specifies step intervals (e.g., `*/15` = every 15 units), `-` defines an inclusive range (`1-5` = Monday to Friday), and `,` lists specific values (`9,17` = 9 AM and 5 PM).
Cron Expression Translator & Schedule Generator
Translate cryptic cron strings into plain English, build schedules visually, and preview the next 10 execution timestamps.
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Convert JSON to TOON (Token-Oriented Object Notation)
Compress verbose JSON payloads into LLM-friendly Token-Oriented Object Notation to cut prompt token usage by up to 60%.
LLM Token Counter & API Cost Estimator
Measure exact token counts for prompts, JSON payloads, and code—and compare API pricing across Gemini, GPT, and Claude.
Key Capabilities
Engine Features & Specifications
Instant Plain-English Translation for Any Cron String
Type or paste any 5-part Linux crontab or 6-part Quartz/AWS cron expression (e.g., `15 9 * * 1-5`) to immediately read `"At 09:15 AM, Monday through Friday"` powered by `cronstrue`.
Interactive Visual Picker & One-Click Presets
Click quick presets (`Every 5 Minutes`, `Every Hour`, `Every Midnight`, `Weekdays at 9 AM`, `1st of Every Month`) or toggle specific minutes, hours, and weekdays visually.
Calculate Exact Next 10 Execution Timestamps
Verify your schedule before deploying to GitHub Actions, Kubernetes CronJobs, Firebase Scheduled Functions, or Linux `crontab` by inspecting the exact upcoming run dates.
Common Inquiries
Frequently Asked Questions
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JSON to TOON Converter
Compress verbose JSON payloads into LLM-friendly Token-Oriented Object Notation to cut prompt token usage by up to 60%.
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LLM Token Counter
Measure exact token counts for prompts, JSON payloads, and code—and compare API pricing across Gemini, GPT, and Claude.
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JSON to TypeScript & Zod
Generate clean TypeScript interfaces, type aliases, and runtime Zod validation schemas (`z.object`) from any JSON payload.
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JSON Diff & Compare
Compare two JSON payloads semantically—ignoring key order and formatting—to spot added, removed, and modified values.