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How to Compress Video on Android and Reduce File Size

How do you compress a video on Android?

You have three ways to compress a video on Android:

  • In your phone's browser, with a tool that works on the device instead of uploading the file.
  • In the Gallery app, by saving the clip in a smaller resolution. Samsung publishes the steps for changing the resolution on its Galaxy models.
  • With an app from the Play Store.

All three re-encode the clip (rewrite it with fewer bits), so some quality goes. How much depends on the size you ask for.

Say your phone filmed a birthday party, and the clip is too big to email to a friend with an iPhone. If you want to compress video on Android without a laptop, start with the browser: no install, no account.

Why your Android videos are so large

Video file size is the bitrate (the amount of data stored per second) multiplied by the length. Your camera sets that bitrate from the resolution and the frame rate (images per second) you film at. More pixels and more images per second mean more data every second.

4K video holds far more pixels than Full HD (1080p). Filming at 60 frames per second instead of 30 doubles the number of images. Both settings look good on a big screen, and both produce large video files on Android that are hard to send.

The codec matters too: it's the method that packs the images into data. H.264 is the older, more widely supported codec; HEVC (also called H.265) keeps similar quality in fewer bits. MP4 is only the container, the box that holds the picture and the sound.

The easiest way to cut video size on Android is to film smaller. On a Samsung Galaxy, Samsung's guide has you open Camera, tap Video, then tap the resolution icon to pick a resolution. The next step in that guide sets the frame rate.

A 1080p clip at 30 frames per second starts smaller than the same clip in 4K at 60. There's less to compress later.

How to compress video files using your browser

You don't need an app for this. Many online compressors upload your file to a server, process it there and send it back.

A browser-based video compressor can do the same work on your Android device. Vidmini's free video compressor runs that way: nothing is uploaded, there's no account and no watermark.

The steps:

  1. In Chrome, Edge or Firefox, open the page to compress an Android video in your browser.
  2. Select the file. MP4, MOV, WebM and MKV files all work.
  3. Pick a target size in MB (presets: 8, 10, 25, 50 or 100) or a quality level: high, balanced or smallest.
  4. To go smaller, cap the resolution at 1080p, 720p or 480p.
  5. Start the compression. The page re-encodes the clip to H.264 with AAC audio (a standard audio codec), in an MP4 file. If the result lands above your target, it runs a corrective pass to bring it down.
  6. Save the compressed video.

If the clip was recorded in HEVC, the browser must be able to decode (read) it. Chrome and Edge support the widest range of codecs, so start there if another browser refuses the file.

Once the page has loaded, the compression keeps working offline: turn off Wi-Fi and mobile data, and it still runs. That's a simple way to check that nothing leaves the device.

We set no size limit, but your phone does. Its free memory and storage decide how large a file it can handle, so close other apps before a long clip. For a file of several gigabytes, open the same page on a computer, which handles files that size.

How to reduce video size with Gallery or a compressor app

On a Samsung Galaxy, the Gallery app can save a video at another resolution. Here's how to reduce video size that way, with the steps from Samsung's support guide:

  1. Open Gallery and select the video.
  2. Tap the Edit button.
  3. Tap More options.
  4. Tap Size and format, then choose a resolution.
  5. Tap Save.

Samsung warns that large or high-resolution videos may take a few minutes to save. Its page doesn't say which models or software versions the steps cover. Not every Galaxy records in 8K, and menus and options may differ by model and software version.

Pick a lower resolution: fewer pixels usually means less data. The steps in Samsung's guide set a resolution, not a bitrate, so check the size of the saved file.

Samsung is the only manufacturer whose Gallery procedure we found published. On another Android phone, open the clip in your gallery's editor and look for a resolution or export setting. If there's no such option, use the browser method above.

Compressor apps come free and paid. We won't rank them here. Before installing any, ask five questions:

  • Does it upload your file to a server, or process it on the device?
  • Does the free version add a watermark?
  • Which permissions does it ask for, and does a compression tool need them?
  • Can you set a target file size, or only pick something like "low" or "high"?
  • Does it save a copy, or overwrite your original?

A paid app isn't better by default. It's worth paying for if it answers those questions better than the free version. If you already use a video editing app, check its export settings first: dropping the export resolution may be all you need.

Is your video too big for email or WhatsApp?

A 500 MB clip won't go out as a Gmail attachment. If you're sending from a personal account, Gmail sets the limit at 25 MB at the time of writing. Work and school accounts follow their administrator's limits.

Go over it and Gmail doesn't block the email: it swaps the attachment for a Google Drive link. You need to compress the clip only when the recipient should get the file itself. Aim a little under 25 MB, since the limit covers all the attachments in the message together.

WhatsApp sets its own size limits, and they change. Check the WhatsApp Help Center for the current figure, then compress the clip to fit.

Can you shrink a video without losing quality?

No. There's no way to compress a video into a smaller file and keep every detail. Video compression re-encodes the file and drops the detail you're least likely to notice.

One change is lossless: copying the video and audio streams into a new container (a remux). It keeps every frame intact, but it doesn't make the file noticeably smaller.

Four habits keep the loss where you won't see it:

  • Lower the resolution as well as the target size. Reducing video resolution means fewer pixels share the same data, so each frame looks cleaner.
  • Don't aim lower than you need. If the limit is 25 MB, asking for 8 MB costs quality for nothing.
  • Use the quality mode (high or balanced) when you have no size limit to hit.
  • Keep the original video. Compress a copy, and delete the original only after you've checked the result.

Can you compress a 1 GB video to 10 MB? You can ask for it. The result keeps about 1% of the original data, so expect a visibly softer image.

At that ratio, cap the resolution at 480p too: a small, clean picture beats a large, blocky one.

There's no fixed percentage for how much smaller a video can get. It depends on the length, the resolution and what's on screen. A still shot of someone talking compresses further than a shaky walk through a crowd. To see how bitrate and length set the file size, read how to make a video file size smaller.

Zipping is a different thing. A ZIP archive bundles files together, but it won't reduce video file size by much, because the data inside is already compressed. Zip several clips to send them in a single file; re-encode a clip to make it lighter.