Free Online Batch Video Compressor
Use the batch video compressor to make several clips smaller on your device. Set a limit per file or choose a quality preset, then download each result separately.
How to use the batch video compressor
- Select the clips you want to shrink together.
- Set a target size per clip or leave it blank and choose a quality level.
- Download each finished clip. If one fails, retry the files listed as failed.
Choose a size limit for each video
Use the batch video compressor when several files have the same delivery requirement. The target field applies to each video you select. If a website accepts a maximum of 25 MB per upload, enter a little less than 25 MB and compare each finished download with the limit. If an email allows 25 MB for the entire message, the budget has to cover every attachment together. Entering 25 in the form for each of three videos could produce nearly three times the allowance.
Duration matters because a file size is shared across the entire recording. A ten-minute talk and a thirty-second demonstration can both have a 10 MB limit, but the talk has much less data available for each second of sound and picture. If the long recording becomes hard to read or its export fails, split the batch according to duration. A higher target for the longer clips keeps the short ones from taking more space than the recipient needs.
Check how the receiving service states the allowance. This batch video compressor treats one MB as one million bytes. The number shown by a file manager may use a different unit or round the result. When the limit is strict, use the exact byte count from the file information window and leave space for anything else you intend to attach.
Divide a fixed budget by duration
- 30 s · 6 MB
- 1,600 kbps
- 60 s · 6 MB
- 800 kbps
- 120 s · 6 MB
- 400 kbps
Each row gives the theoretical combined data rate for a 6 MB file. Multiply the size in bytes by eight and divide by the number of seconds. The container and soundtrack use part of the total. The useful picture budget is lower, especially for a long recording with a small target. These are planning figures you can calculate before choosing files.
When to choose a quality preset
Leave the target size empty when the receiving device has enough storage and your priority is the picture. The batch video compressor offers three quality presets. Compare two exports of a short, demanding clip before you commit a whole group to one setting. Keep the playback window the same size during the comparison. Enlarging just one of the copies makes differences in detail much harder to interpret.
The preset values are encoding settings. Selecting 65 does not mean the result will occupy 65 percent of the original file. A recording of a stationary slide can use much less data than footage of water or moving leaves at the same resolution. Fine print, scrolling text and abrupt changes of scene are useful places to compare. Watch the downloaded copy at normal speed as well as pausing on a frame with small lettering.
Entering a target changes the nature of the job. The batch video compressor uses duration to estimate how much data it can devote to each second. Sound also needs part of that budget. Increasing the quality preset cannot make a very small allowance hold an unlimited amount of detail. Shorten a recording that contains unnecessary material or give that file a separate, larger allowance.
Keep the separate downloads in order
Select the individual recordings you want to process. Files from the same folder can share settings even if they contain unrelated scenes. Read the names in the input list before starting. If two sources share a name, notice their positions and compare the numbered downloads with the list. Save them to a separate output folder so that the original recordings remain easy to find.
The batch video compressor processes the clips in sequence. Keep the tab open until the results appear. The downloads are separate video files, so you can hand one recording to a colleague without also sending the rest. To make a single continuous programme, decide the scene order first and use the merge tool. Compressing the clips as a group does not insert transitions or join their soundtracks.
If the results include failed files, save the successful downloads and use the retry control for the failed group. Try opening a failed recording on its own. Check that it plays beyond the opening frame, that its recorded length makes sense and that the device has memory available. If only the longest video fails with a small target, raise its allowance before repeating a successful batch with the same settings.
Batch video compressor questions
Can I use one limit for an entire folder?
The batch video compressor accepts selected files and applies the same target to each one. To meet a combined allowance, add the sizes of the exported files before sending them. Give priority to a longer or more detailed recording when dividing the total. A short introduction with a still title usually needs less space than a full demonstration.
Why is one output larger than its source?
A small source may already use an efficient encoding or a low data rate. A new export has its own picture, sound and container overhead. Compare the saved size with the original and keep the smaller usable copy for delivery. For a strict limit, enter a target and check the actual download rather than judging by the preset number.
How do I spot a bad export before sharing it?
Open each downloaded file and check the point that matters most to the recipient. For a training clip, pause where the smallest menu label appears. For spoken material, listen to a complete sentence and seek near the end. Confirm both the content and the final size before removing a source from the working folder.
Can I use the batch video compressor to change formats?
Use this page when the job is to reduce file size. If the recipient specifies a particular format such as WebM, or wants only an audio track, use the batch video converter and select that output there. Check a sample in the receiving application before converting the full list.