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Age CalculatorWork out exact age in years, months and days — plus total days and the next birthday.Date & Time ToolsAI API Cost CalculatorWork out what a prompt costs per call, per day and per month, and compare the same workload across every major model.AI & LLM ToolsAI Audio TranscriptionRun Whisper locally to turn speech into text, SRT, VTT or a timestamped transcript. Works offline after the first run.On-Device AIAI Background RemoverCut the subject out of a photo with a real segmentation model that runs in your browser. No upload, no sign-up, no watermark.On-Device AIAI Content DetectorScore text with a real language model in your browser and see the per-token surprise that detection methods are built on.On-Device AIAI Crawler robots.txt GeneratorGenerate the robots.txt rules for 21 AI crawlers, separating training from search and from fetches a real user asked for.SEO ToolsAI Text to SpeechTurn text into natural speech with a neural voice running in your browser, and download the audio as a WAV file.On-Device AIAI Writing Pattern CheckerMeasure sentence-length variance, vocabulary richness, marker phrases and typographic tells, with per-sentence scoring.AI & LLM ToolsAlt Text CheckerFind images with missing, empty, filename-based or overlong alternative text.AccessibilityAPI Request BuilderBuild an HTTP request visually and get it as curl, fetch, axios, Python, Go or PHP code.Developer ToolsApp Icon GeneratorTurn one square image into every app icon size iOS, Android, the web and desktop need.Design StudioApp Store Screenshot GeneratorTurn raw app screenshots into captioned App Store artwork at every resolution Apple requires.Design Studio