Change playback speed, stretch audio online, slow playback for cinematic effects, or fast forward videos instantly. Upload any media file, choose a custom speed from 0.10x to 5x, or match a target duration automatically.
Whether you want to fast forward a video on iPhone, slow down a time lapse, create dramatic slow-motion playback, or make a video longer for social media, this tool lets you adjust media speed directly in your browser.
Traditional video editors can feel overwhelming for a simple speed adjustment. Media Speed Changer removes the complexity — upload your file, select your playback speed or target duration, and download the processed version in seconds.
How it works
Upload MP4, MOV, MP3, WAV, and other common media formats directly from your device.
Slow playback down to 0.10x, fast forward up to 5x, or automatically match a custom duration.
Process your file instantly and download the adjusted version with synced audio and video.
Features
Increase playback speed for tutorials, recordings, meetings, podcasts, and long-form content.
Reduce playback speed smoothly for cinematic slow motion, sports analysis, and dramatic edits.
Automatically calculate the correct speed needed to make a video longer or shorter.
Stretch or compress audio duration while keeping playback synchronized with your media.
Adjust playback speed directly from your mobile browser without installing editing apps.
Upload, process, preview, and download files entirely online with no software installation.
Whether you want to slow playback for cinematic effects, fast forward long recordings, or make a video longer to match audio timing, Media Speed Changer gives you precise control directly in your browser.
Many creators search for ways to slow down a time lapse on iPhone or desktop after recording footage too quickly. By reducing playback speed, you can create smoother motion, highlight details, and make short time-lapse clips easier to watch.
Quickly increase playback speed for tutorials, meetings, gaming recordings, podcasts, or lectures. Fast-forwarding helps compress long-form content into shorter clips that are easier to share on social media or review later.
If your clip ends too quickly, you can stretch the duration by slowing playback speed. This is useful for syncing footage with narration, background music, transitions, presentations, or platform-specific timing requirements.
Use the tool as an audio stretcher online to extend or compress MP3, WAV, and other audio files directly in your browser. Playback speed changes are processed while keeping audio synchronized with your media.
Reduce playback speed for sports highlights, cinematic edits, tutorials, or reaction videos. Slower playback helps emphasize movement and creates a more immersive viewing experience.
If you're wondering how to fast forward a video on iPhone or slow down a time lapse without installing editing software, this browser-based tool works directly from your mobile device.
Supported Formats
Upload and change playback speed for popular media formats directly in your browser. Whether you need to change speed of an MP4 video online, stretch a WAV audio file, or slow down a MOV file recorded on iPhone, the tool supports a wide range of media formats.
No. Our tool is designed to change video speed without quality loss. Whether you are fast-forwarding an MP4 or slowing down a MOV file, the system preserves your original video resolution and exports in HD quality.
No, the audio stays perfectly synchronized and natural. The built-in audio stretcher automatically adjusts the track length to sync audio to video speed changes automatically, allowing you to alter media without pitch distortion.
Yes. If you need to match audio length to video duration or match background music to video length, just use our 'Match Target Duration' feature. Input your video's exact runtime, and the tool will stretch or compress the audio to a specific length automatically.
Media Speed Changer is a free online video speed tool with no watermark. You can upload, process, preview, and download your finished files with completely clean, professional results and zero hidden fees.
No installation is required. If you want to speed up a video on iPhone without an app, or adjust playback speed on Android, simply open your mobile browser. You can upload directly from your camera roll and process media entirely online.
We offer a free video speed changer that supports all common formats. You can upload video formats like MP4, MOV, WEBM, AVI, MKV, and MPEG, or audio formats like MP3, WAV, AAC, M4A, FLAC, and OGG.
If you want to slow down a time-lapse video for better detail visibility or smoother motion, simply upload the clip, choose a slower playback speed such as 0.5x or 0.25x, and export the processed file instantly.
Yes. To make a video play in double speed (2x speed) or any custom speed up to 5x, upload your file, select your preferred fast-forward speed multiplier, and download the accelerated file with perfectly synced audio.
Yes, you can make a video longer by slowing down the playback speed. By reducing the speed, you stretch the visual frames out over a longer timeline, which is perfect for meeting social media platform length requirements.
Absolutely. This is the best way to speed up educational videos, tutorials, and recorded Zoom meetings. You can fast-forward long videos up to 5x to review lengthy content and catch key details in half the time.
Yes. Our platform acts as a standalone audio stretcher online too. You can upload audio files separately (like MP3 or WAV podcasts and audiobooks) and stretch or compress playback duration directly in your browser.
To create a slow motion video effect for free without complex special effects software, drop your video into our editor and lower the speed. Slower playback helps emphasize movement for sports analysis or cinematic edits.
Our free online video speed changer is optimized for long files. While processing times vary depending on your internet connection speed, you can confidently upload long-form video and audio files without system errors.
Because this is a browser-based tool to change video playback speed, it runs completely online. It does not function as an offline video speed tool without internet, meaning you need an active connection to process your files.
Slow down videos, fast forward clips, stretch audio, or match any duration directly in your browser — free to use.
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