Video Speed Changer
Speed up or slow down video files (0.25x slow motion to 4.0x fast forward timelapse) online without watermark.
Online Video Speed Changer
100% Client-Side PrivacySpeed up or slow down MP4, WEBM, MOV, and AVI videos from 0.25x slow motion to 4.0x fast forward timelapse directly in your browser.
Drop your video file here, or browse
MP4, WEBM, MOV, AVI, MKV, FLV, 3GP, TS & M4V supported
Speed changed 100% locally in your browser. No server upload.100% Client-Side Privacy
All video speed transformations and canvas frame capture run 100% locally in your web browser. Zero server uploads.
0.25x Slow Motion to 4.0x Fast
Create high-speed timelapses, sports slow-motion highlights, or speed up lengthy lectures and tutorials effortlessly.
Multi-Format Export
Export speed-adjusted videos as MP4, WEBM, animated GIF timelapses, or extract sped-up audio tracks as MP3.
Frequently Asked Questions
How do I speed up a video to 2x or 4x?
Upload your video file, click the "2.0x" or "4.0x" preset button (or use the speed slider), select your export format, and click "Change Speed".
Is my video file uploaded to any server?
No! ReadyForFile processes video speed changes 100% locally inside your browser with complete data privacy.
Can I make a slow-motion video?
Yes! Select presets like 0.25x, 0.5x, or 0.75x to convert your video into smooth slow motion.
What video formats are supported?
We support MP4, WEBM, MOV, AVI, MKV, FLV, 3GP, TS, and M4V video formats.
What does Video Speed Changer do?
ReadyForFile Video Speed Changer is a free online utility that speed up or slow down video files (0.25x slow motion to 4.0x fast forward timelapse) online without watermark. directly in your web browser with no registration or software installation required.
About Video Speed Changer
Free online Video Speed Changer. Accelerate videos up to 4.0x for fast forward timelapses or slow down clips to 0.25x for smooth slow motion. Presets include 0.25x, 0.5x, 1.25x, 1.5x, 2.0x, 3.0x, 4.0x with continuous slider control. Export as MP4, WEBM, or animated GIF. 100% browser-based processing with zero server uploads.
Features & Capabilities
- Multi-speed presets: 0.25x, 0.5x, 1.25x, 1.5x, 2.0x, 3.0x, 4.0x
- Continuous speed slider control (0.1x to 4.0x)
- Live preview video playback speed synchronization
- Output duration comparison calculation (e.g. Original 60s → 30s @ 2.0x)
- Multi-format export: MP4, WEBM, animated GIF, MP3 audio
- 100% local browser transcoding with zero server uploads
How to Use Video Speed Changer
Upload Video File
Select or drag and drop your MP4, MOV, WEBM, or AVI video file into the speed changer box.
Select Speed Multiplier
Click a speed preset button (2.0x, 0.5x) or adjust the continuous speed slider.
Process & Download
Click 'Change Speed' to process locally in your browser and download your speed-adjusted video file.
Frequently Asked Questions
How do I speed up a video to 2x or 4x for free?
Upload your video file, click the '2.0x' or '4.0x' speed preset button, and click 'Change Speed'.
Is my video file uploaded to any server?
No! All video speed processing and canvas rendering run 100% locally in your web browser using HTML5 Web APIs.
Can I make a slow-motion video?
Yes! Select presets like 0.25x, 0.5x, or 0.75x to convert your video clip into smooth slow motion.
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