1Upload the videos you want resized — work from the largest original you have rather than from a copy you already shrank once.
2Type a target width, a target height or a percentage, and leave the aspect-ratio lock on unless you deliberately want stretching.
3Run the resize; every file in the batch is taken to the same target in a single pass.
4Download the resized Video file, or the whole set together as one archive.
Resize Video FAQ
How does Resize Video change the dimensions?
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Concretely, each clip is probed for its real resolution first, then scaled and re-encoded, so a batch of mixed sources lands on one target size rather than one scale factor. You give it a target width, a target height or a percentage, and it works from the original rather than from a previously resized copy.
Can I keep the aspect ratio, or force exact dimensions?
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Both. Lock the ratio and one dimension follows from the other, which is what you want almost always. Unlock it and you get exactly the numbers you typed, at the cost of stretching — which on video means every face in the frame is slightly too wide. When you need a different shape, crop or letterbox rather than stretch.
Does the source format affect the result of a resize?
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It does. this format is read and written by the same streaming pipeline as everything else we support. That is what decides whether shrinking the file is purely a question of pixels or also a question of re-encoding.
Is there anything specific to Video I should watch for?
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Yes — the container and codec are probed before anything runs, so mixed uploads in one batch are handled per file. Worth checking before you resize a file you will not be able to regenerate.
What is the most common mistake when resizing videos?
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Upscaling. Enlarging cannot invent detail that was never captured, so the result is a soft version of the original at a bigger size. Always resize down from the largest source you have, and resize once rather than in stages.
What resolution should I actually target?
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Match where it will be played. 1920x1080 is still the safe default for almost everything; 1280x720 roughly halves the bitrate and is plenty for a screen recording or a talking head; 3840x2160 is only worth keeping if the footage was genuinely shot at it. Vertical platforms want 1080x1920. Never scale up.
Which video formats does Resize Video accept?
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MP4, MOV, MKV, WebM, AVI, WMV, FLV, 3GP, M4V, MPEG and MPG. Each file is probed for its real container and codec before anything runs, so a mixed batch is handled correctly file by file.
Is there a file size limit on Resize Video?
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Yes: free accounts process video up to 1 GiB per file whichever container you brought; ffmpeg with x264, x265 and libvpx does the encoding. It is high enough that upload speed is usually the binding constraint rather than the cap itself.
Will Resize Video lower the quality of my videos?
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Only if the operation requires re-drawing frames. Container-level and timeline-level work is done as a stream copy, which is bit-identical to the source and finishes in seconds. Anything that must re-encode does so at a quality level you choose.
Can I run Resize Video on several videos at once?
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Yes, and it matters here more than anywhere else — video jobs run in minutes, so queueing the batch in parallel is the difference between one wait and several.
What happens to audio, subtitle and chapter tracks?
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They are carried across wherever the target container can hold them, including multiple audio languages, embedded subtitles and chapter markers, rather than silently keeping only the first track of each.
Does Resize Video cost anything?
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No. Resize Video is free without an account, and the output has no watermark, corner logo or intro card. Uploaded video is deleted from the workers shortly after the job completes.
