# Compress MP4 to 100 MB > Compress an MP4 video to 100 MB or less to shrink long recordings under 100 MB. 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-100mb Shrink an MP4 to 100 MB or less to shrink long recordings under 100 MB. API: `POST /api/v1/jobs` with `"operation": "compress", "target_size": "100mb"` (paid plans). ## How to compress an MP4 to 100 MB 1. **Add your MP4.** Drop one or more MP4 files onto the compressor above, paste them, or click to browse. 2. **100 MB is preset.** The target is already set to 100 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 - 100 MB is roomy for anything up to ten minutes or so; hour-long recordings will need a lower resolution. - For a 1-minute clip, 100 MB leaves about 13.3 Mbps for video and audio together (1080p, close to the original); a 3-minute clip gets 4.4 Mbps (1080p, high quality). - 100 MB here means 100,000,000 bytes, a little under the 104,857,600 bytes some sites mean by 100 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 100 MB A 100 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 | 13.3 Mbps | 1080p, close to the original | | 3 min | 4.4 Mbps | 1080p, high quality | | 5 min | 2.7 Mbps | 1080p or 720p | | 10 min | 1.3 Mbps | 720p | | 30 min | 444 kbps | 360p, fine on a phone | _Rough guide for H.264-class video. Static scenes and screen recordings look better than fast action at the same bitrate._ ## What 100 MB is typically for - Long screen recordings, lectures and webinars - Forms and file-sharing tools with a 100 MB cap - Archiving phone videos without filling your storage 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 25 MB](https://www.converterrr.com/compress-mp4-to-25mb): Email attachments - [Compress MP4 to 50 MB](https://www.converterrr.com/compress-mp4-to-50mb): Portals & bigger uploads Got a mix of formats? [Compress any video to 100 MB](https://www.converterrr.com/compress-video-to-100mb). ## MP4 to 100 MB: frequently asked questions ### How do I compress an MP4 to 100 MB? Drop the MP4 onto the compressor above. The 100 MB target is already set, so just click Compress and download the result. ### Will the file be exactly 100 MB? It aims to land at or just under 100 MB. 100 MB here means 100,000,000 bytes, so it also fits sites that count 1 MB as 1,048,576 bytes. ### How much quality will I lose at 100 MB? 100 MB is roomy for anything up to ten minutes or so; hour-long recordings will need a lower resolution. For a 1-minute clip, 100 MB leaves about 13.3 Mbps for video and audio together (1080p, close to the original); a 3-minute clip gets 4.4 Mbps (1080p, high quality). ### My MP4 is already smaller than 100 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 100 MB? If a video is too long for 100 MB, the quality would drop too far. Trim it to the part you need, or pick a larger size. ### What is 100 MB typically needed for? Common reasons: long screen recordings, lectures and webinars; forms and file-sharing tools with a 100 MB cap; archiving phone videos without filling your storage. 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.