What compression level should I choose?

The tool uses a balanced compression setting optimised for the best size-to-quality trade-off — typically reducing file size by 50–70% with minimal visible quality loss. For most videos this is the ideal choice for sharing on social media, email, or messaging apps.

What video formats does the compressor support?

The tool accepts MP4, MOV, WebM, AVI, MKV, M4V, and most other common video container formats. The output is always an MP4 file, which is universally supported across devices, browsers, and editing software.

Is there a file size limit?

The free online compressor supports video files up to 200 MB. For larger files, you can use a local video editor with FFmpeg.

Does my video get stored on your servers?

No. Your video is uploaded, compressed, and immediately deleted from the server. We do not store, share, or process your video beyond the compression operation itself.

Will compressing my video affect the resolution or frame rate?

Resolution may be slightly reduced if the source exceeds 1080p — the tool caps output at 1080p for faster encoding and smaller file sizes. Frame rate stays exactly the same. The bitrate reduction is imperceptible for most content.

Why is the output always MP4?

MP4 (H.264) is the most widely supported video format across social media, streaming platforms, messaging apps, and video editors. Converting to MP4 during compression ensures maximum compatibility for the output file.

How do I calculate video file size before compressing?

Use the formula: bitrate (kbps) × duration in seconds ÷ 8,000 = file size in MB. A 1080p video at medium quality (~5 Mbps) runs about 37 MB per minute. A 720p video at ~2.5 Mbps is roughly 19 MB per minute. These estimates assume H.264 encoding at standard export settings.

What video bitrate should I use for 1080p?

For 1080p H.264 video: Low quality uses around 3,000 kbps (3 Mbps), Medium quality uses around 5,000 kbps (5 Mbps), and High quality uses around 8,000 kbps (8 Mbps). YouTube recommends 8 Mbps for 1080p at 30fps. For social media and messaging apps, 3–5 Mbps is usually sufficient and keeps file sizes manageable.

What is the maximum video file size for Discord, WhatsApp, and email?

Discord free accounts are limited to 25 MB per upload (Discord Nitro raises this to 500 MB). WhatsApp supports video files up to 16 MB. Standard email attachments are typically capped at 10–25 MB depending on the email provider. Instagram Reels allows up to 100 MB, TikTok up to 287 MB, and Twitter/X up to 512 MB.

How do I compress a video to under 25 MB for Discord?

Upload your video using the compressor above and click Compress. The tool applies balanced H.264 compression which typically reduces file size by 50–70%. A 5-minute video that starts at 100–150 MB will usually land well under Discord's 25 MB limit. If the result is still too large, try shortening the clip or exporting at a lower resolution before uploading.

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Check it out!

Free Video Compressor Online

Reduce video file size in minutes — no account required.

Compressed on our servers and deleted immediately — never stored

Drop your video here, or click to browse

MP4, MOV, WebM, AVI, MKV — up to 200 MB

Free Online Video Compressor

Reduce video file size online — fast, free, and private

Your video is uploaded, re-encoded using H.264 on our servers, and permanently deleted the moment your download starts — it is never stored or shared. The compression adjusts the video bitrate while keeping the same resolution, frame rate, and audio track intact.

Deleted immediately after compressionUp to 75% smaller fileH.264 MP4 outputResolution preserved

Why Compress a Video?

Unlike tools that store your files indefinitely, this compressor deletes your video the instant your download is ready. Nothing is retained, shared, or processed beyond the single compression operation.

The H.264 output is supported by every major platform — YouTube, Instagram, TikTok, Vimeo, WhatsApp, iMessage — so the compressed file works everywhere without additional conversion.

Video File Size Calculator & Bitrate Guide

Estimate file size before you compress

Understanding video file size helps you know whether you need to compress before uploading. File size is determined by bitrate × duration — a 1080p video at 5 Mbps runs roughly 37 MB per minute. Platform limits like Discord (25 MB), WhatsApp (16 MB), and Instagram (100 MB) are easy to hit with longer clips, which is where compression saves you.

How big is a 1080p video?

A 1080p H.264 video at medium quality runs approximately 5 Mbps. A 1-minute clip is roughly 37 MB; a 5-minute video around 187 MB. Use the formula: bitrate (kbps) × duration (s) ÷ 8,000 = file size in MB.

Platform file size limits

Discord free: 25 MB. WhatsApp: 16 MB. Email: 10–25 MB. Instagram Reels: 100 MB. TikTok: 287 MB. Twitter/X: 512 MB. YouTube: no practical limit. If your video exceeds these, compress it first.

How much can you compress a video?

Typical H.264 re-encoding at balanced quality reduces file size by 50–70% with no visible quality loss. A 40 MB clip commonly compresses to 10–20 MB, depending on source bitrate and content complexity.

How To Compress A Video Online

Four steps to a smaller video file

Step 1

Upload your video

Drag and drop your video file onto the upload area, or click to browse. Supports MP4, MOV, WebM, AVI, MKV, and more.

Step 2

Choose a compression level

The tool automatically uses an optimised balanced compression profile — best size-to-quality trade-off for most videos.

Step 3

Compress the video

Click Compress and our server re-encodes your video using H.264. Processing typically takes 1–3 minutes depending on video length.

Step 4

Download your compressed file

Once processing is complete, your compressed MP4 downloads automatically. You can see exactly how much file size was saved before downloading.

Best Use Cases

When you need to compress a video

Video compression is useful any time a large file creates a problem — whether that is a platform upload limit, an email attachment cap, or a storage budget. This tool handles the re-encoding so you do not need a local video editor or command-line tools.

Uploading to social media

Platforms like Instagram, TikTok, Twitter, and LinkedIn have file size limits. Compressing your video first prevents upload failures and reduces processing time on the platform side.

Sending videos via email or messaging

Email attachments and messaging apps often cap file sizes at 25–100 MB. Compressing a large video makes it sendable without needing a third-party hosting link.

Reducing storage and bandwidth costs

Hosting compressed video on a website or CDN directly lowers bandwidth bills. A 60% smaller file means 60% less data served to every viewer.

Platform Compression Guides

Compress video for specific platforms

Each platform has different file size limits and format requirements. Our dedicated guides walk you through exactly how to compress your video for Discord, WhatsApp, and more.

Compress Video for DiscordGet under Discord's 25 MB free upload limit. H.264 MP4 plays inline in chat.

15,700/mo searches

Compress Video for WhatsAppGet under WhatsApp's 16 MB limit for messages and status posts.

4,400/mo searches

Compress Video to 25MBTarget the exact 25 MB Discord and email attachment limit.

1,600/mo searches

Compress Video to 10MBCompress 1 GB to 10 MB for email and strict attachment limits.

8,000/mo searches

Free MOV CompressorCompress iPhone ProRes and Mac MOV files to H.264 MP4 online.

8,100/mo searches

FAQ