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Aim a little below the stated limit so a small difference in the final file size does not block delivery.
Free Video Size Compressor
Set your target in MB and choose a maximum height. Check the exported MP4 against your upload limit.
Only edit videos you own or have permission to edit. Stillmore does not offer a YouTube video downloader.
Fit a car reveal under a size limit
The original cut moves from the rear lamp to the bodywork. Compare the paint reflections in the 720p export against the master.
How to fit a video into a size limit
Choose the finished clip
Start with the exact cut you intend to share; running time determines how much detail can fit.
Set the target and height
Enter your MB budget and choose the original height or a lower cap.
Encode and check the file
Download the MP4, check its size and review movement and small text before delivery.
Make the handoff fit
A short product shot and a long screen recording can need different settings even when the upload limit is identical.
Send a mobile review
Try a lower height for a talking-head proof that will be reviewed on a phone.
Keep demo text readable
Check the smallest labels in the downloaded MP4 before sending a compressed software walkthrough.
Preserve motion in a short ad
If confetti or a whip pan breaks into blocks, try a larger budget or shorten the edit.
Video size compressor FAQ
Why might the final MP4 differ from the target size?
The encoder budgets bitrate across the clip. Audio and container overhead also take space, so check the final file before uploading. For a strict cap, aim a little below it.
Why is the target too small for my clip?
The available bitrate falls as duration increases. Try a larger target or a shorter cut.
Will a height cap enlarge a small source?
No. The cap only reduces the height when the source is taller; the aspect ratio is preserved.
Does the target apply to the picture alone?
The target is for the whole MP4. The compressor budgets for the picture, any audio and file overhead together.
Does a silent clip reserve space for an audio track?
No. The compressor reserves 128 kbps for sound only when the input contains an audio stream.
Why does the compressor process the clip twice?
The first pass analyzes the video. The second uses that information to encode the picture within the calculated bitrate budget.
What file do I receive after compression?
Download compressed.mp4. It contains H.264 video, with AAC audio if the input had sound.
Related tools
Stillmore Inspiration
From Source to Serve
If a food promo looks muddy when squeezed into a small file, review the preparation-to-serving sequence in From Source to Serve and choose the strongest moments for a shorter cut.
Behind the Shoot
Watch the model turn the sunglasses toward the camera. The frame keeps the accessory clear of the edges.
Product Premiere
The teal bodywork carries through to the backdrop. Look at how the wide shot picks up a colour from the close-up.
Grand Tour
The dining room gives way to the open kitchen. Notice which room details carry across the cut.