MP4 Compressor
Compress MP4 and WebM videos directly in your browser. Reduce file size before uploading to social media — no upload to servers, no signup.
Drop your video here or click to upload
MP4, WebM, MOV · Max 500MB · Works best in Chrome100% Private
Your video never leaves your device — all processing in the browser.
Reduce File Size
Compress before uploading to Instagram, TikTok, WhatsApp, or email.
Full Control
Choose quality, resolution, frame rate, and format to match your needs.
What is MP4 Compressor?
The MP4 Compressor is a free browser-based tool that reduces the file size of MP4 videos without re-uploading them to any server. Large video files are slow to upload to social media, exceed platform size limits, and consume storage space. MediaDrop's MP4 Compressor uses browser-based video processing to reduce file size by adjusting output quality, resolution, and frame rate — all directly in your browser with no software installation and no privacy concerns. The compressed video downloads instantly and is ready to upload to Instagram, TikTok, YouTube, or WhatsApp.
How to use MP4 Compressor
- Step 1: Upload your MP4 video by clicking the upload area or dragging and dropping.
- Step 2: Select your target quality — Low (smallest file), Medium (recommended), or High (best quality).
- Step 3: Optionally choose a lower output resolution (720p, 480p, 360p) for even smaller files.
- Step 4: Click Compress Video to process in your browser.
- Step 5: Preview the compressed video and check the size reduction shown.
- Step 6: Click Download to save the compressed MP4.
Tips for better results
- Medium quality is the sweet spot. For social media uploads, Medium quality reduces file size by 40–60% with virtually no visible quality difference on mobile screens.
- Reduce resolution for messaging apps. WhatsApp, Telegram, and iMessage have strict video size limits. Compressing to 480p or 360p creates tiny files perfect for sharing in chats.
- Compress before uploading to Instagram. Instagram recompresses all uploaded videos automatically. Starting with a well-compressed file reduces the quality loss from Instagram's own compression.
- Check the duration-to-size ratio. A 1-minute video at medium quality should typically be under 15MB. If your compressed file is still very large, try reducing the resolution.
- Use for TikTok uploads. TikTok has a 287.6MB upload limit. For long videos, compression is essential to stay within this limit while maintaining good quality.
- Process one video at a time. For best browser performance, compress videos one at a time rather than trying to process multiple files simultaneously.
Frequently Asked Questions
What is the maximum video size?
For best browser performance, use videos under 500MB. Very large files may cause the browser to slow down. For files over 500MB, consider using desktop video compression software.
How much can MP4 files be compressed?
Typical compression results: Medium quality reduces file size by 40-60%. Low quality can reduce by 70-80%. Actual results vary based on the original video content and encoding. Action-heavy videos compress less than static content.
Does compression reduce video quality?
Yes, but at Medium quality setting the difference is barely visible on phone screens and small monitors. The goal is to find the smallest file size where quality is still acceptable for your use case.
Is my video uploaded to compress it?
No. All compression happens in your browser. Your video file never leaves your device and is never sent to any server.
What output format does it produce?
The compressor outputs WebM or MP4 depending on browser support. WebM is typically 20-30% smaller than equivalent MP4 at the same quality. Both formats are accepted by all major social media platforms.