Add or Replace Audio in Video - Easily add new audio to your video (mixing with original sound) or completely replace the video's existing audio. Keeps original video length. Option to loop shorter audio. Adjust added audio volume in dB.

Add Watermark to Video - Easily add a text or image watermark to your videos online. Customize position, size, font, and color. No uploads required.

Adjust Video Speed - Easily change video playback speed (slow motion or fast forward) online. Supports 0.25x to 4.0x speed adjustment. Free, client-side processing. Featured

Flip Video - Easily flip your videos horizontally (mirror) or vertically online without uploading. Free, fast, and secure. Featured

FPS Converter - Easily change the frame rate (FPS) of your videos online. Supports presets and custom FPS. Free, fast, and client-side processing. Featured

GIF to MP4 Converter - Convert your animated GIFs into MP4 videos directly in your browser. Customize quality, size (dimensions/scale), preview, and download instantly. Fast, free, and private.

Loop Video - Easily loop your videos a specified number of times. Processes in your browser, no uploads. Free and secure.

Merge Videos - Combine multiple video files into a single video online. Client-side merging, reorder videos before merging. Free and secure. Featured

MP4 to GIF Converter - Convert your MP4 videos into animated GIFs directly in your browser. Customize size, FPS, and preview instantly.

Random Video Thumbnail Generator - Generate random thumbnails from uploaded videos. Featured

Remove Audio from Video - Easily remove the audio track (mute) from your video files online. Keeps video quality. Client-side processing. Featured

Reverse Video - Easily reverse short video clips online (best under 20s). Optionally select start/end times. Processed in your browser. Featured

Rotate Video - Easily rotate your videos 90, 180, or 270 degrees clockwise or counter-clockwise online without uploading. Free, fast, and secure.

Screen Refresh Rate Test - Free online screen refresh rate test that measures your monitor's real Hz in the browser by counting actual frames. See your measured refresh rate, exact frame time in milliseconds, jitter and dropped frames graded A to D, plus a live frame-time chart. Then use the Motion Smoothness Lab to compare 15, 30, 60 Hz and your native rate side by side and see the difference for yourself. Find out if your 144Hz or 240Hz monitor is really running at full speed. No download, no sign-up, works on phone and desktop.

Video Bitrate Calculator - Calculate the optimal video bitrate for a target file size, duration, resolution, frame rate, codec, audio bitrate, and desired quality level. Includes bitrate budget breakdown, quality fit score, bits-per-pixel-frame density, and encoder settings. New

Video Compressor - Compress video files online directly in your browser. Reduce video size with adjustable quality settings. Free, secure, and no uploads required. Featured

Video Cropper - Crop your videos online directly in your browser. Draw a rectangle to select the area, preview, and download.

Video Splitter - Easily split a segment from your video online without uploading. Select start and end times visually. Free, fast, and secure. Featured

Video to Image Extractor - Extract single or multiple image frames from your videos online. Select time, interval, and format (PNG, JPG, WEBP). Featured

Webcam Test - Free online webcam test that checks your camera in the browser with a live preview, real measured frame rate and true resolution readout. Scan which resolutions your webcam actually supports from VGA to 4K, run the automated Camera Health Check to grade your brightness, contrast, focus, FPS stability and white balance with fixes, watch a live luminance histogram, then take a snapshot to see how you look. 100% private — your video is processed on your device and never uploaded. No sign-up, no download, works on phone and desktop.