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Compress MP4
Compress video to an exact size in MB — free, nothing uploaded.
- Runs on your device
- Hit an exact MB target
- One video free · Batch with Pro
- Free to 1080p · Pro to 4K
Drop a video here
Up to 100 MB and 5 minutes on the free plan · Takes MP4, MOV, WebM, MKV, GIF
Platform presets aim just under each service's attachment limit.
Target a size when you have a limit to meet; target quality when you just want it smaller.
Higher keeps more detail and costs more megabytes.
Scaling down is the largest single saving available. Free exports up to 1080p.
Dropping the soundtrack is often the quickest way under a limit.
How to compress videos online
- 1
Upload your video
Select a video file (for example MP4, MOV, or WebM). It is loaded for processing.
- 2
Choose compression settings
Pick output format, max resolution, quality, and frame rate. Balance file size and visual quality for your use case.
- 3
Start compression
Run compression. Processing happens locally on your device; time depends on length and device performance.
- 4
Preview and download
Compare size before and after, preview the output if you like, and download the compressed video.
Why compress videos?
Compression cuts file size dramatically, speeds up uploads and downloads, saves storage, improves streaming, and helps meet platform size limits.
Benefits of video compression
- Major size reduction: Often shrink files substantially while keeping acceptable quality.
- Faster uploads: Smaller files are quicker to share and back up.
- Storage savings: Free space on devices and cloud accounts.
- Better streaming: Optimize clips for the web and social platforms.
- Email and attachments: Reduce size to fit attachment limits where needed.
Video compression explained
Compression removes redundancy, uses efficient codecs, and trades bits for smaller files. Understanding the basics helps you balance size and quality.
Codec types
- H.264: Widely supported; great default for compatibility.
- H.265 (HEVC): More efficient than H.264; smaller files at similar quality when supported.
- VP9: Open codec; strong for web streaming.
- AV1: Modern codec with excellent compression efficiency.
Compression process
- Frame analysis: Similar frames and motion are encoded together to save space.
- Codec encoding: H.264, HEVC, VP9, and others compress pixel data efficiently.
- Bitrate control: Lower bitrate means smaller files and more visible compression.
- Resolution scaling: Downscaling reduces pixels and file size when you do not need full resolution.
Encoders analyze frames, remove imperceptible detail, and pack data more efficiently.
Quality settings guide
Match resolution and bitrate to how viewers will watch your video.
Resolution recommendations
- 480p: Smaller files; good for previews and low bandwidth.
- 720p: Solid quality for web and many social uses.
- 1080p: High quality for general professional and personal use.
- 4K: Ultra-high detail for large screens and production workflows.
Bitrate guidelines
- 1–2 Mbps: Light compression; previews and low-quality previews.
- 3–5 Mbps: Typical web-quality HD at moderate settings.
- 5–10 Mbps: Strong quality for 1080p and similar.
- 10–20 Mbps: High quality for demanding content.
Key statistics
These points help you set expectations before you compress.
- Compressed video is often much smaller than raw or lightly compressed sources.
- 1080p at moderate bitrates usually looks great for typical viewing.
- 4K can be compressed heavily depending on bitrate and content.
- Smaller files upload and share noticeably faster.
- Most streaming services rely on compression for delivery.
Common use cases
Compression helps across platforms and industries.
Social media
Shrink clips for Instagram, Facebook, X, TikTok, and similar apps when you need to meet size or length limits.
YouTube and streaming
Faster uploads and smoother playback when you encode efficiently for the platform.
Website embedding
Smaller hero and product videos improve load time and Core Web Vitals.
Storage management
Archive large libraries using less disk or cloud space.
How to compress MP4 and reduce video file size
Why H.264 MP4 is still the default swap format—and how to shrink it without breaking playback.
MP4 (usually AAC + H.264) is the lingua franca of phones, TVs, browsers, and creator platforms. That popularity means files balloon fast when people record long screen shares or 4K phone footage. This workflow keeps you inside real limits: adjust resolution ladders, cap fps for talking-head clips, and dial bitrate so HD videos still scrub on Chromebooks. We never output a file larger than the original—if compression can't reduce size, we keep the original and tell you.
Compress MP4 when your file is too large for email, messaging, or upload limits. Use MP4 output when you need maximum compatibility (phones, browsers, social). For web-only use, WebM can sometimes be smaller; for Apple-only workflows, MOV is an option. For most users, H.264 MP4 is the best balance of size and compatibility.
Compatibility
Compressed MP4 (H.264) plays on iPhones, Android, Windows, Mac, smart TVs, and major browsers. YouTube, Instagram, and other platforms accept it. Defaults aim for a safe quality level; you can tune resolution and quality as needed.
Quality considerations
We use efficient encoding and never aim to exceed the original bitrate unnecessarily. High-bitrate sources (for example 20+ Mbps) can often be reduced a lot; already compressed videos may show limited savings. Audio is encoded at sensible bitrates to keep size down while preserving speech clarity.
Example use cases
- Shrink screen recordings or tutorials for email or Slack.
- Reduce phone or camera MP4 size for faster upload or backup.
- Prepare video for web or app embedding with a smaller file.
- Fit more videos on a USB or cloud storage by compressing MP4.
- Create smaller copies of event or meeting recordings for sharing.
Best practices
- Use moderate quality and resolution so the video stays sharp while shrinking file size.
- High-bitrate or high-resolution sources see the most size reduction.
- For email or messaging, choose a smaller target; for large screens or archival, use higher quality settings.
- MP4 (H.264) is ideal for broad compatibility with phones, browsers, and social platforms.
Common use cases
- Screen recordings & tutorials: Shrink screen recordings or tutorial videos for email, Slack, or documentation.
- Phone or camera footage: Reduce MP4 or MOV from phones and cameras for faster upload or backup.
- Web and app embedding: Prepare video for web or app embedding with a smaller file for faster loading.
- Storage and backup: Fit more videos on USB or cloud storage by compressing without losing playability.
- Social and sharing: Meet platform size limits or speed up sharing by reducing file size. Output plays everywhere.
Frequently asked questions
Will compressing MP4 reduce quality?
Stronger compression can reduce visible quality. You control quality, resolution, and format. The tool never outputs a file larger than the original.
How do I compress an MP4 to a specific file size?
Lower the resolution to 720p or 480p and reduce quality to around 60–70%. For short clips, dropping the frame rate to 24 fps can also help. Adjust settings and check the expected output size before downloading.
What resolution should I choose to compress MP4 without noticeable quality loss?
Dropping from 4K to 1080p or from 1080p to 720p removes large amounts of data with minimal visible change. Screen recordings and talking-head videos often tolerate 480p well. Pair resolution changes with the quality slider for the best balance between size and clarity.
Can I compress a 4K MP4 to 1080p or 720p in my browser?
Yes. Select your target resolution in the settings before compressing. Your browser re-encodes the video in H.264 at the chosen size without uploading any files. Processing time depends on video length and your device's hardware.
Why is the output size sometimes similar?
If the source is already heavily compressed or settings are close to the original bitrate, savings may be small. Try lower quality or smaller resolution for more reduction.
How does video compression work?
It removes redundant information and uses efficient codecs (such as H.264 or HEVC) so files take less space.
Will compression reduce quality?
Stronger compression can reduce visible quality. You choose quality, resolution, and format to balance size and appearance. Moderate settings are often hard to notice.
What settings should I use to hit a specific file size?
Set the mode to Target size and enter the number of megabytes you need — the compressor solves for a bitrate that lands under it. If the result looks soft, lower the resolution to 720p or 480p rather than raising the target, since fewer pixels at the same size means more bits for each one. Check the limit you are aiming at in the service you are sending to, then preview before downloading.
How much smaller can files get?
It depends on the source and settings. Highly compressed or low-resolution sources may not shrink much; high-bitrate files often have more room to save.
Why is my compressed video sometimes the same size or larger than the original?
This happens when the source is already highly compressed at a low bitrate. Re-encoding with a different codec can actually inflate the file. The tool detects this and warns you when output would exceed the original, keeping the smaller version automatically.
Can I compress several videos at once?
Yes. The free plan compresses one video at a time; Pro queues up to 20 and hands them back as a single ZIP, so a folder of clips is one press and one download.
What is the best compression setting?
It depends on your goal: web sharing often works well at 720p or 1080p with moderate bitrate; social networks publish recommended specs; archival may favor higher quality.
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