Developer utilities for the AI-coding era. No signup. Your data stays in your browser.
Format, validate, and minify JSON — built by people who actually use it.
Paste a JSON sample, get TypeScript / Zod / Pydantic v2 / Go / Rust / Kotlin / 13+ languages.
Convert epoch and ISO across timezones — without the timezone bug bite.
Count tokens for GPT-5.5, Claude 4.x, Gemini, DeepSeek, and 20+ models — see what each costs.
Compare two blobs of text — for LLM patches, config diffs, and the things git can't help with.