Free online debounce/throttle function generator. Generate JavaScript debounce and throttle code instantly with leading/trailing options and maxWait support. Pure frontend.
The Debounce/Throttle Generator is a free online tool that helps frontend developers quickly generate JavaScript debounce and throttle function code. No need to write complex timer logic — configure parameters and get production-ready code. Pure frontend, no uploads.
Wait 300ms after the user stops typing before sending API requests, avoiding requests on every keystroke.
Execute scroll handlers at most once every 16ms for smooth 60fps performance.
Wait for the user to stop resizing before recalculating layout, avoiding frequent reflows.
Debounce and throttle are two core frontend performance optimization techniques. Lodash's _.debounce and _.throttle are the most popular implementations, but importing all of lodash increases bundle size. This tool generates zero-dependency standalone implementations that are feature-complete and lightweight. requestAnimationFrame can also be used for visual update throttling but isn't suitable for general-purpose scenarios.
Debounce: waits for a pause in triggering before executing. If triggered again during the wait, the timer resets. Best for search input, window resize. Throttle: executes at most once per time interval regardless of how many times triggered. Best for scroll events, mouse move.
Leading: whether to execute immediately at the start of the wait period. Trailing: whether to execute the last call after the wait period. Default debounce has trailing=true, throttle has leading=true.
maxWait is a throttle option that sets the maximum wait time. Even with continuous triggers, the function will execute at least once after maxWait, preventing long periods without execution. Similar to lodash's throttle implementation.
Yes. The generated code is pure JavaScript with zero dependencies. Copy it directly into your project. Supports ES5+ syntax and all modern browsers.
Search input autocomplete, form validation, window resize handling, preventing double-clicks, auto-save. The key idea is 'wait until the user stops, then execute'.
Scroll event handling, mouse move tracking, drag updates, game loops, API polling. The key idea is 'execute at a fixed rate, never exceed'.