Free Video Converter

Video Converter

Convert videos to MP4, WebM, GIF, and other formats.
Fast, free, and secure client-side processing.

How to Video Converter - Convert Video Files Online for Free

Convert video files online for free. Supports MP4, AVI, WebM, GIF and more. Secure client-side processing.

Upload Video

Select or drag and drop your file to start video converter online. No account or software install required.

Choose Format

Pick the output format and quality for video converter. Common presets help you convert in one click.

Download

Download your result instantly. Your video converter output is ready to share, email, or publish.

Why Use FormatWiz for Video Converter?

Free, secure Video Converter with client-side processing—no signup required.

Fast Conversion

Convert short videos in seconds using WebAssembly.

100% Private

Your videos never leave your device.

Multiple Formats

Support for MP4, WebM, AVI, and GIF.

100% Secure

Your Video Converter runs locally in the browser—files never upload to our servers.

Lightning Fast

No upload queues—get instant results from our free Video Converter online.

Choosing an output format that actually plays

Video compatibility is decided by the container and codec together. MP4 with H.264 is the combination that plays on effectively everything made in the last decade, which is why 'convert to MP4' solves most 'this file won't open' problems in one step.

Format	Best for
MP4 (H.264)	Universal playback — the safe default
WebM	Smaller web embeds; patchy on Apple/older apps
MOV	Apple ecosystems
AVI	Legacy Windows software
Size limit here	100 MB — trim longer clips first

Typical jobs people use this for

Converting a screen recording so a client can open it without codecs
Making a drone clip playable on a smart TV
Turning a WebM download into something a video editor accepts

When this is the wrong tool

Re-encoding the same clip repeatedly stacks quality loss — always convert from your original, and don't convert at all if the file already plays where it needs to. For clips over 100 MB, split first.

Frequently Asked Questions

How large a video can I convert?

Up to 100 MB. Video is decoded and re-encoded inside your browser rather than on a server, and that ceiling keeps the process within the memory a browser tab can safely use. Longer clips are best trimmed first.

Why does conversion take longer than an online uploader?

Because the encoding happens on your own device rather than on a rendering farm. You trade some speed for the fact that your footage is never uploaded. Expect roughly real-time processing on a modern laptop, and keep the tab in the foreground so the browser does not throttle it.

Which format should I convert to?

MP4 with H.264 is the safest general choice — it plays on essentially every phone, TV, browser and editing program. WebM produces smaller files for web embedding but has patchier support in older software and on Apple devices.

Will converting reduce the quality?

Some loss is unavoidable when re-encoding between compressed formats, though at sensible settings it is not visible in normal viewing. Repeatedly converting the same clip compounds the loss, so always start from your original file rather than a previous conversion.

Is my video uploaded anywhere?

No. Conversion uses FFmpeg compiled to WebAssembly, which runs inside the browser tab. Your footage stays on your device — you can disconnect from the internet once the page has loaded and it will still work.

Guides & Tutorials

Step-by-step guides for every FormatWiz tool — free, private, and browser-based.

View all guides

Video4 min read

How to Convert Video Online Free Between MP4, AVI, and MOV

Learn how to convert video online free with no signup — change MP4, AVI, MOV, and WebM formats in your browser using fast client-side processing.

Read guide

Video3 min read

How to Trim, Crop, and Rotate Video Online for Free

Learn how to edit video online free — trim clips, crop the frame, and rotate footage in your browser with no registration and client-side processing.

Read guide

Video3 min read

How to Split a Video Online Free Into Separate Segments

Learn how to split video online free into segments and save individual clips in your browser — no registration, with fast client-side processing.

Read guide

Explore More Tools

Video Editor Split Video Merge Videos