Editing · Updated 4 October 2026
Compress video without losing readable text
Reduce resolution and encoding size, then judge the downloaded file instead of trusting a quality label.
Compression is a trade between file size and the information preserved in the picture. A smaller file is useful only if the viewer can still read the screen, recognize the demonstration and follow movement. An already efficient source may become larger when it is re-encoded.
Make one controlled change
- Keep the original and record its file size.
- Open the compressor. Choose a frame width that still fits the destination and keeps important text legible.
- Start at quality 28. Larger values apply stronger compression and can lose more visible detail.
- Download the result. Compare its actual byte size with the original, then inspect a still section and a moving section.
Choose what to reduce
| Source | First change to try | What to inspect |
|---|---|---|
| Screen demonstration | Moderate encoding compression before a large resize | Small interface labels and thin lines |
| Talking head | A lower frame width if the destination displays it small | Eyes, hair and face movement |
| Fast movement | More conservative quality settings | Blocky motion, fine texture and scene changes |
When the export is larger
The source may already use an efficient codec or a low bitrate. Re-encoding it at a different quality target does not guarantee a smaller file. Compare measured sizes and keep the original when the new version offers no useful gain.
Our size calculator estimates bytes from duration and bitrate. It does not predict the compressor’s exact output because variable-bitrate encoding responds to the picture. For a hard upload limit, leave room for container overhead and confirm the saved file size.
- View the export at the size your audience will see.
- Check captions and embedded screen text.
- Verify audio remains synchronized after the conversion.
Use the tools in this guide
Sources and further reading
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