Record your screen, application window, or browser tab with optional microphone audio. Choose HD, Full HD, or 2K quality. Download as WebM or MP4. No software installation needed.
Runs on FFmpeg
Content reviewed October 2026 · About Toolzum
Extracts the audio track from uploaded video files (MP4, MOV, AVI, WebM) and encodes it as a high-quality MP3 file. Free to start with no signup.
Crop the visual area of your MP4 or WebM video directly in the browser with 9:16, 1:1, 16:9 presets or custom dimensions with X/Y offsets. Free to start with no signup.
Reduces MP4, MOV, and WebM video file sizes with a configurable CRF 20–40 slider (default 28, libx264 fast preset), plus a GIF mode with color-palette control. Videos never leave your device — compression runs locally in your browser with FFmpeg WASM.
Generates a browser extension that captures browser tabs, full screens, or specific application windows with configurable resolution, frame rate. No signup or account required.
Record voice memos straight from your microphone with live levels — interviews, notes, ideas. Capture clean audio without installing apps — local recording, unlimited saves.
Yes. When you start recording, the browser asks you to choose between recording your entire screen, a specific application window, or a browser tab. Pick the option that fits your needs.
Microphone audio is optional and off by default — toggle it on before recording (denied mic permission records silently). System sound is not captured directly; to record tab audio, share a browser tab that is playing it — support depends on your browser and OS.
Choose between 720p (HD), 1080p (Full HD), or 1440p (2K). Higher resolutions produce larger files. 1080p is the best balance of quality and file size for most recordings.
There is no time limit, but longer recordings produce larger files. A 10-minute 1080p recording is roughly 200-500MB depending on screen content. Make sure you have enough disk space.
WebM records faster because it uses a browser-native codec. MP4 requires conversion after recording, which adds a few seconds. Both formats produce good quality — WebM is slightly more efficient.
Video Trimmer
Cut start/end segments from any video with fast stream-copy trimming in your browser (keyframe-aligned, no re-encode). Remove a 45-second cold open from a 10-minute upload — local FFmpeg work, unlimited saves.
Video Compressor
Reduces MP4, MOV, and WebM video file sizes with a configurable CRF 20–40 slider (default 28, libx264 fast preset), plus a GIF mode with color-palette control. Videos never leave your device — compression runs locally in your browser with FFmpeg WASM.