Is there a file size limit?

No fixed limit. Very large files simply take longer; output streams to disk.

Can I batch many MOVs?

Yes — drop several files at once and the batch queue converts them with the same settings, saving into a folder you choose.

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MOV to MP4 — without uploading

A MOV from an iPhone or camera usually already contains H.264 or HEVC video; it only needs a different container to play everywhere. havenConverter can remux or re-encode, and does both in the tab. Nothing is uploaded: the file is read from your disk, processed in the browser tab and saved back to your device.

Open havenConverter →

Steps

Drop the MOV into the studio.
Container: MP4. Codec: keep H.264 (or HEVC if the source is HEVC and the destination supports it).
Resolution: Original, Quality: High — for a like-for-like file.
Export.

Keep the audio

AAC audio is copied straight through into the MP4 on the hardware path, so the soundtrack is bit-identical. Other audio codecs are re-encoded via the CPU engine when needed.

Frequently asked questions

Is there a file size limit?: No fixed limit. Very large files simply take longer; output streams to disk.
Can I batch many MOVs?: Yes — drop several files at once and the batch queue converts them with the same settings, saving into a folder you choose.

Tools used in this guide

Compress video without uploadingSmaller files, your privacy intact.Convert MP4 to AVILegacy AVI output, made privately.

More guides

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Updated 2026-09-06