Video Compressor
Compress one browser-supported video at a time and preview the quality/file-size tradeoff before downloading an MP4.
Related tools
Same job on a different file type or batch size. Each tool still processes the file in this browser.
Compress a Video in Your Browser
Choose the Output Settings
Select an output resolution, frame rate, codec, and encoding preset. The tool only offers lower resolutions and frame rates after it reads the source, helping you avoid accidental upscaling.
Understand the Quality Tradeoff
Video compression is not lossless. A smaller resolution, lower frame rate, or stronger encoding setting can reduce file size while also removing visual or motion detail. Keep the original and inspect the preview before downloading.
Browser-Dependent Input Support
The uploader accepts common video file types, but successful decoding and encoding depend on the browser, device, and source codec. The downloaded result is an MP4 when processing succeeds.
One File at a Time
The web tool accepts one video up to 200MB per run. It does not provide batch compression or a guaranteed target file size.
Why Choose Our Video Compressor?
Local Browser Processing
This workflow performs conversion in the browser with the MediaBunny library. It does not send the selected video to a cloud compression server.
Device Resources Matter
Because processing happens locally, speed and memory limits depend on the device, browser, video duration, resolution, and codec. Long or high-resolution files can take longer or fail on constrained devices.
Preview Before Downloading
Compare the processed preview with the source before downloading. Fine text, fast motion, gradients, and low-light footage can reveal compression artifacts first.
MP4 Output
The tool packages the processed result as an MP4. Codec availability can vary by browser, so choose H.264 when broad playback compatibility is more important than experimenting with another offered codec.
Perfect Video Compression for Every Need
Smaller Sharing Copies
Create a smaller copy for a message, upload, or draft by reducing resolution or frame rate. The tool does not include platform-specific presets, so check the destination's current requirements yourself.
Web and Presentation Drafts
A reduced copy can be useful for review links, presentations, and tests where the original file is unnecessarily large. Keep the source for final editing and archival work.
Do Not Replace the Master
Compression permanently changes the exported copy. Keep the original or a high-quality master when you may need to edit, re-export, or archive the footage later.
Email and Messaging
Use the estimated size as a guide when preparing an attachment, then check the actual downloaded file against the destination limit. The tool does not guarantee a precise target size.
How to compress videos online for free?
- 1
Step 1: Upload Your Video
Drag and drop or select your video file. We support videos up to 200MB in size including MP4, WebM, AVI, MOV, and other popular formats.
- 2
Step 2: Choose Output Settings
Select an available resolution, frame rate, codec, and encoding preset. Lower settings can reduce file size but may remove visible detail.
- 3
Step 3: Compress and Preview
Run the compression in your browser and compare the processed preview with the original.
- 4
Step 4: Download the MP4
Download the result and verify its actual file size, playback, audio, and visual quality before sharing it.
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How much can I reduce my video file size?
There is no guaranteed reduction. The result depends on the source codec, bitrate, resolution, frame rate, duration, and selected output. Re-encoding an already efficient source can produce a small reduction or even a larger file.
Will compressing my video reduce the quality?
Yes. Video compression can remove detail or motion information. Use the preview, choose conservative settings when quality matters, and keep the original file.
What video formats are supported?
The uploader accepts common video types, including MP4, WebM, AVI, and MOV, but decoding depends on your browser and the source codec. Successful results download as MP4 files.
Is there a file size limit for video compression?
The web uploader accepts one video up to 200MB. It does not offer batch processing in this workflow.
How long does video compression take?
Compression time depends on video length, resolution, codec, selected settings, browser, and device resources. The tool does not guarantee a fixed completion time.
Instasize pricing: free editing and paid AI plans
Resize, crop, add text and work with layers for free. Paid plans include an AI usage allowance, background removal and access to image and video models. First-time subscribers can start with a free trial.
Free
Essential tools for casual creators.
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Pro
PopularEssential AI tools for creators
Billed monthly
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Advanced features for professionals
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Billed monthly
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