# Compress MP4 to 25 MB > Compress an MP4 video to 25 MB or less to fit common 25 MB email attachment limits. Runs in your browser, so your files never leave your device. Free, no sign-up, no watermark. URL: https://www.converterrr.com/compress-mp4-to-25mb Shrink an MP4 to 25 MB or less to fit common 25 MB email attachment limits. API: `POST /api/v1/jobs` with `"operation": "compress", "target_size": "25mb"` (paid plans). ## How to compress an MP4 to 25 MB 1. **Add your MP4.** Drop one or more MP4 files onto the compressor above, paste them, or click to browse. 2. **25 MB is preset.** The target is already set to 25 MB, and each file is compressed to land at or just under it. You can switch to another size or a percentage to reduce by. 3. **Compress.** Click Compress. The MP4 is processed in your browser; nothing is uploaded. 4. **Check and download.** Check the new size, then download each file or all of them as a ZIP. ## Good to know - 25 MB holds a couple of minutes at good quality. Email attachments grow by about a third when encoded for sending, so a file right at the limit may still bounce. - For a 1-minute clip, 25 MB leaves about 3.3 Mbps for video and audio together (1080p or 720p); a 3-minute clip gets 1.1 Mbps (720p). - 25 MB here means 25,000,000 bytes, a little under the 26,214,400 bytes some sites mean by 25 MB, so the result fits either way. - MP4 compression runs entirely in your browser with WebAssembly, so nothing is uploaded and your files never leave your device. ## What fits in 25 MB A 25 MB file has a fixed bit budget, so the longer the clip, the lower the bitrate and resolution it can have. | Clip length | Video + audio bitrate | Realistic quality | | --- | --- | --- | | 1 min | 3.3 Mbps | 1080p or 720p | | 3 min | 1.1 Mbps | 720p | | 5 min | 667 kbps | 480p | | 10 min | 333 kbps | 360p, fine on a phone | | 30 min | 111 kbps | Too low: trim the clip | _Rough guide for H.264-class video. Static scenes and screen recordings look better than fast action at the same bitrate._ ## What 25 MB is typically for - Many email providers cap attachments around 20–25 MB - Learning platforms and assignment portals - Chat apps with larger upload limits Limits vary by site and change over time; check the exact number where you're uploading. ## How MP4 gets smaller Re-encodes the video at a lower bitrate (and resolution on Strong); audio is re-encoded to AAC. [Compress MP4 by quality level instead](https://www.converterrr.com/compress-mp4) ## Neighbouring sizes - [Compress MP4 to 5 MB](https://www.converterrr.com/compress-mp4-to-5mb): Email & form uploads - [Compress MP4 to 10 MB](https://www.converterrr.com/compress-mp4-to-10mb): 10 MB upload limits - [Compress MP4 to 50 MB](https://www.converterrr.com/compress-mp4-to-50mb): Portals & bigger uploads - [Compress MP4 to 100 MB](https://www.converterrr.com/compress-mp4-to-100mb): Long videos, smaller Got a mix of formats? [Compress any video to 25 MB](https://www.converterrr.com/compress-video-to-25mb). ## MP4 to 25 MB: frequently asked questions ### How do I compress an MP4 to 25 MB? Drop the MP4 onto the compressor above. The 25 MB target is already set, so just click Compress and download the result. ### Will the file be exactly 25 MB? It aims to land at or just under 25 MB. 25 MB here means 25,000,000 bytes, so it also fits sites that count 1 MB as 1,048,576 bytes. ### How much quality will I lose at 25 MB? 25 MB holds a couple of minutes at good quality. Email attachments grow by about a third when encoded for sending, so a file right at the limit may still bounce. For a 1-minute clip, 25 MB leaves about 3.3 Mbps for video and audio together (1080p or 720p); a 3-minute clip gets 1.1 Mbps (720p). ### My MP4 is already smaller than 25 MB. What now? Then it already fits, and compressing it further would only cost quality. Upload it as it is, or pick a smaller target if you need it smaller still. ### What if my MP4 can't get down to 25 MB? If a video is too long for 25 MB, the quality would drop too far. Trim it to the part you need, or pick a larger size. ### What is 25 MB typically needed for? Common reasons: many email providers cap attachments around 20–25 MB; learning platforms and assignment portals; chat apps with larger upload limits. Limits vary by site, so check the exact number where you're uploading. ### Is my MP4 private? Yes. It's compressed inside your browser and never uploaded.