Open your video
Add an MP4, MOV, M4V, WebM or MKV. Your browser reads the file locally; there is no upload queue.
Online video compressor
Smaller videos for WhatsApp, Discord, email and Slack. Free, private, no watermark.
No uploads No watermarks No sign-up
Video compressor
Runs on your device01
Your video
Start with a fileSelect your video
Drag and drop your video, or choose a file.
MP4, MOV, M4V, WebM, MKV · Up to 4 GBYour video never leaves your device. No account needed.
A private video compressor
Your video stays on your device, from selection to download.
Ready for your platform
Pick WhatsApp, Discord, Email or Slack. The size on each card is your compression target.
See the difference
Preview the original and compressed video before saving your MP4.
FROM TOO BIG TO READY TO GO
From a large file to a smaller attachment
Three steps to a smaller attachment. Your original stays untouched, so you can compare versions and adjust the settings.
Choose a videoPick a destination or size
Select a platform preset, or enter a target such as 10 MB or 25 MB. Keep H.264 for broad compatibility and choose a resolution that suits your clip.
Preview, then download
The video compressor shows the actual output size. Drag the divider to compare original and compressed details, check the sound, then save your MP4.
A GOOD STARTING POINT
Reduce video resolution without stretching the frame
A video compressor divides the available data across the full duration of the recording. A one-minute clip has more room for detail than an hour-long recording at the same target size. The video compressor starts at the source resolution and offers only smaller choices. If the source has nonstandard dimensions, those dimensions appear under Original. For a portrait clip, 720p refers to the short edge; the picture keeps its proportions, with dimensions rounded to an even number of pixels where needed. This changes resolution without cropping or stretching the frame.
YOUR PRIORITYTRY THIS
Quick sharingShort clips and everyday moments480p–720p
More detailPresentations, tutorials and demos1080p
Keep the dimensionsA larger target with original resolutionOriginal
For text-heavy recordings, increase the target size before lowering the resolution.
A video size reducer for 10 MB, 25 MB and other targets
Choose Custom and enter the size your recipient accepts. The video compressor calculates a budget from duration, reserves space for sound and checks the finished file. The target is the size you want to stay within; the result may be smaller or occasionally exceed it.
Duration changes what is practical. At a 10 MB target, our current settings allocate about 2.46 Mbps to a 30-second video, 1.17 Mbps to a one-minute video and 0.195 Mbps to a five-minute video with audio. These are calculated budgets, not measured quality scores. The long clip needs a larger target, fewer pixels or a shorter source.
MP4 compressor, MOV recordings and WebM screen captures
An MP4 that is already small
MP4 describes the container, not its compression level. A compact source may offer little further saving. Use a smaller target only if the preview still preserves the detail you need.
A MOV from a phone or camera
The video compressor saves an MP4 instead of overwriting your MOV. Keep H.264 for recipients with older devices; H.265 appears only when a compatible encoder is available.
A WebM or MKV recording
The video compressor must support the codecs inside the file. WebM-to-MP4 compression can change the codec as well as the size. The original extension alone cannot predict the amount saved.
Why this video compressor avoids unnecessary waiting
Fast video compression depends on the whole workflow, not just the encoding percentage. These implementation choices reduce transfers, avoidable work and unnecessary engine loading.
No video transfer or server queue
This video compressor reads the selected file directly on your device. There is no media upload before encoding or server download afterward. Loading the website and its processing modules still requires a connection.
Browser-native encoding first
We use Mediabunny to read the media and WebCodecs to access a supported browser encoder. Hardware acceleration depends on the browser and device. The heavier FFmpeg compatibility engine loads only when the H.264 native path is unavailable.
Settings based on the source
The video compressor reads source frame timing and bitrate, forwards the tested encoder configuration and avoids adding unnecessary frames to a source with a lower frame rate. It checks the result and makes an additional size-correction attempt only when needed.
Check small text, motion and sound before sharing
When using this video compressor for a screen recording, inspect a menu or caption at its normal viewing size. Increase the target before reducing resolution if text is hard to read. For sports or moving foliage, check a moving section rather than only a still frame. For a talking clip, listen to the start and end.
Use the comparison divider at the same playback position. If the video compressor reports that the result is still above your target, it is not ready for a strict attachment limit. Choose a larger allowed target, lower the resolution, or shorten the original in your editor. Your original file remains available.
Compress a 1 GB or 2 GB video to a suitable size
In this video compressor, input size and output target are separate. For a 2 GB recording, choose Custom and enter the size your recipient accepts; 16 MB may be too small for a long clip. Start with H.264. For 4K footage viewed on a phone, compare 1080p or 720p; for a tutorial, check the smallest text before lowering resolution.
If the video compressor reports a memory error, close other demanding tabs and try a lower output resolution. For a storage error, check the available disk space and whether the browser allows this site to store data. A smaller target cannot repair an unreadable source. Keep the tab open, and retry the original on a computer if a phone repeatedly stops. The 4 GB selection limit does not guarantee completion.
THE DETAILS, SIMPLIFIED
Video compressor questions
File sizes, formats and quality explained.
About this video compressorHow do I use the video compressor for email or Discord?
Choose Email for a 25 MB target or Discord for a 20 MB target. WhatsApp targets 16 MB and Slack targets 100 MB. Each card shows the size used for compression. Choose Custom to enter another size, then check the actual output before sharing.
Can this video compressor reach exactly 10 MB or 25 MB?
Enter the target in MB. We reserve room for audio and the MP4 container, then check the output. If it is too large, the video compressor retries once from the original. Some files still exceed the target; that is shown clearly. Try a lower resolution or a shorter source.
Can a video compressor reduce size without losing quality?
Re-encoding is lossy, so identical quality is not guaranteed. Start with a moderate reduction at 720p or 1080p. Fast motion and small text need more data than a simple scene. Use the comparison divider to judge the result and keep your original file.
Is this MP4 video compressor free and without a watermark?
Yes. You can compress and download without an account or payment. No watermark is added. It works with one file at a time, subject to your browser and device limits.
Does the video compressor upload my file?
No. Video, audio and filenames stay on your device. The website downloads its processing software when needed. Large jobs may use temporary browser storage; canceling or replacing a result releases it. After a forced browser exit, you can clear this site’s data in browser settings.
Which formats and codecs can I use?
Select MP4, MOV, M4V, WebM or MKV; the codecs inside must be supported. The video compressor exports MP4 with H.264 by default. H.265 is available when a compatible encoder is detected, but some recipients may need a different player.
Will the video compressor work with a 2 GB or 4 GB video?
You can select up to 4 GB. Completion depends on memory, storage, codecs and resolution, especially on phones. Keep the tab open and use a computer for demanding jobs. Not every large file will finish on every device.
Can I use this video compressor with an iPhone or Mac recording?
Choose a source file that is available on your device throughout processing. A MOV can become MP4 if its codecs are supported. Keep the tab open, start with H.264 and test the downloaded file in the intended player. The video compressor uses your device’s memory and storage; a long 4K recording may need a computer or a lower resolution.