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Free Bulk Video Converter for MP4, MOV, MKV and WebM

Genuinely free. No trial, no signup. Conversion runs on your device, so there's nothing to meter.

  • No signup, no email, no trial period
  • No signup wall, no upsell prompts, no watermark
  • Free works because the encode runs on your device, not a server
  • The practical limit is your device, not a server cap
  • MP4, MOV, MKV, and WebM in and out

Overview

A lot of "free" video converters are not actually free. The first 200 MB is free, the first three files are free, the first 720p output is free, after which the upgrade prompt appears. The pattern exists because running a server-side converter at scale is expensive. The operator pays for ingress bandwidth, encoder CPU time, storage for in-flight files, and egress bandwidth on the way back. Someone has to pay for that, which is why there is a paywall.

This tool side-steps the whole economic chain. The encoding runs in your browser on your device, so the operator's cost per conversion is essentially zero. The site itself is just static files served from a CDN. Genuinely free becomes a viable position because there is nothing to recoup.

Concretely: no signup, no email gate, no trial, no watermark. The practical limit is your device, not a paywall.

Technical notes

Why most "free" converters cap you

Server-side converters pay for ingress, CPU time, storage, and egress per job. The free tier is a loss leader funded by upgrades. Caps exist to limit the loss.

Why this one does not

Encoding runs in your browser, so the operator pays only for serving static page assets, pennies per thousand visits. There is nothing to recoup, so there is no cap.

What it costs to run

Static hosting on a CDN plus anonymized analytics. No upload bandwidth, no encode compute, no storage for in-flight files. The marginal cost per conversion is effectively zero.

Good to know

The cap is your device

There is no server-side cap, but encoding runs on your machine. Very large files and very long batches need free RAM, disk, and CPU/GPU time.

Browser support varies

WebCodecs availability does not guarantee every codec path. MP4, MOV, and MKV output require H.264 plus AAC; Firefox and desktop Linux browsers lack native AAC encoding. Safari 16.4 added video WebCodecs, but audio encoding arrived in Safari 26. WebM uses VP9 plus Opus and may work where AAC output does not. Mobile support remains device-dependent.

How to use a free bulk video converter

Use a free bulk video converter in your browser without uploading any files.

01

Add your videos

Drag and drop your video files into the converter, or click to pick them.

02

Choose your settings

Pick the output format, quality, optional width, and whether to remove audio.

03

Start the batch

Click Convert files. Each file is processed locally on your device.

04

Download

Download files individually, or grab the whole batch as a ZIP.

Frequently Asked Questions

Is it really free with no catch?

Yes. No signup, no trial period, no watermark. The encoding runs on your device, so there is no per-job cost to recoup.

Will there be a paid tier later?

If anything is added it will be on top of what is here today, not behind a new cap. The free tier exists because it is the natural shape of the product, not a marketing funnel.

Are my files uploaded anywhere?

No. The conversion runs in your browser; nothing is sent to a server.

What is the catch?

The encoding runs on your device rather than a server, so very long batches can make your laptop's fans spin. That is the trade for no upload and a free price tag.

Which browsers does this work in?

Conversion requires WebCodecs video encoding and decoding, but each browser and device supports a different codec subset. MP4, MOV, and MKV output use H.264 video with AAC audio; Firefox and desktop Linux browsers do not natively encode AAC. Safari 16.4 added video WebCodecs, while Safari 26 added audio encoding and decoding. WebM output uses VP9 with Opus and may work where AAC output does not. For the widest support, use a recent desktop Chrome or Edge release, or Safari 26+. The converter still validates the actual source and output codec configuration when a job starts.

Sources: MDN: WebCodecs API · MDN: WebCodecs codec selection · WebKit: WebCodecs video support in Safari 16.4 · WebKit: WebCodecs audio support in Safari 26 · Mediabunny: supported formats and codecs · Reviewed 2026-10-12

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