Make a video easier to send.

PRACTICAL NOTES

Start with balanced reduction

Choose Balanced first if text, faces, or movement need to remain readable. Strong reduction uses a lower resolution and more compression; it can produce a smaller file, but artifacts become more visible. Keep the original so you can try another setting without repeatedly compressing an already compressed output.

Check the actual result

Compare the displayed file sizes and play the output. A short video that was already efficiently encoded can grow after re-encoding. If the result is too large, try Strong reduction or trim the clip in an editor before processing. This tool does not remove content or promise an exact megabyte target.

Read the full Video Size Reducer guide for a realistic workflow and final checks.

FILE SIZE DECISIONS

Reduce size without losing the part that matters

Start with the destination's actual limit and the source file's current size. The reducer offers Balanced and Strong presets; it does not promise an exact 10 MB or 25 MB result. Balanced can keep up to 720p, while Strong can reduce the frame size to around 480p and apply heavier compression. Choose based on the content of the clip. A talking-head recording can tolerate different trade-offs from a screen recording with small text or a sports clip with rapid motion. Preserve the original so you can try both presets from the same source.

Test quality before committing to Strong

Process a short representative clip first if the full video is important. Watch faces, subtitles, slides, product labels and movement at the size a viewer will use. Blocky shadows, smeared motion and unreadable text are signs that the reduction is too aggressive. If a form merely rejects the file for size, trimming unnecessary seconds in an editor may preserve more clarity than heavily compressing every frame. The tool itself reduces encoding size; it does not remove content or edit the story.

Compare actual sizes

Read the reported output size after processing. An already efficient or very short source can become larger after re-encoding. Do not assume the word "reduced" means the new copy is automatically smaller. If Balanced stays above the limit, try Strong and inspect it again. A result only slightly below the limit may still fail when a receiving service measures bytes differently, so leave some margin when the use case permits it. Do not rename the file extension in place of real compression.

Check sound and playback

Play the downloaded MP4 from beginning to end, particularly where sound begins or a scene changes. Make sure voices remain intelligible and the final frame is present. Compare duration and orientation with the original. A preview in the tool is useful, but the file you share is the one that matters. Keep a note of which preset made the accepted version so you can repeat the process without repeatedly compressing an already compressed copy.

Video conversion uses a browser engine downloaded on first use, roughly 32 MB, and works on your device. Files up to 100 MB are accepted, but memory, source codec and clip length can still stop a job on a phone. Keep the tab open and try a smaller input if processing fails. A smaller file may take less space to send, but it will not restore a poor recording or change the destination's content rules. When the receiving service offers several upload methods, check whether it compresses videos again after upload. A very aggressive local export followed by another platform encode can make fine text and faces worse. Keep a slightly higher-quality copy for your records and send the smallest version only when the limit requires it. Test that final uploaded version, not just the local download.

Consider the audience's connection and screen size when choosing the preset. A small file can be convenient to send but unpleasant to watch if slides or captions become unreadable. If the same recording serves both an archive and a quick message, keep a higher-quality master and create a separate smaller sharing copy. Give the copies distinct names so the wrong one is not uploaded.