SideKit Video Converter
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Video · GIF · APNG  →  MP4 / WebM

Convert video to MP4 & WebM.

Convert & compress in your browser. No upload, no signup.

Drop a file, or click to choose

Video: MP4 / MOV / WebM ｜ Image: GIF / APNG / PNG (multiple images for animation)

WHAT IT DOES

From any source to MP4 & WebM.
Convert, trim, and edit in one place.

01

Video → MP4

Re-encode & resize

Input MP4 720p
Output MP4 480p
02

GIF → MP4

Animation to video

GIF input
Input GIF
Output MP4
03

APNG → WebM

Modern container

APNG input
Input APNG
Output WebM
01 / FORMATS

Supported formats

Video in
MP4 · MOV · WebM
Image in
PNG · GIF · APNG multiple images become an animation
MP4 out
H.264 · variable bitrate · optimized for mobile / social
WebM out
VP9 · high compression · ideal for web embedding
02 / WORKFLOW

How it works

  1. 01Drop a file (video, GIF, APNG, or PNG sequence).
  2. 02Trim the part you need on the timeline.
  3. 03Adjust output size (W × H) and quality.
  4. 04Pick MP4 or WebM as the output format.
  5. 05Hit "Export" → "Download" to save to your device.
03 / FAQ

Frequently asked

Why convert GIF to MP4?

GIFs tend to be huge by spec, but MP4 expresses the same content at roughly 1/10 to 1/20 the size. Useful for staying under social platform upload limits or improving page load times. Some platforms like X (Twitter) re-encode GIF posts to MP4 internally — uploading MP4 directly often yields better quality.

Should I use MP4 or WebM?

For compatibility, MP4 (H.264). For smaller file size, WebM (VP9). MP4 plays on virtually every platform and device. WebM has wide browser support and tends to be smaller at the same quality. A reasonable rule: MP4 for social posts, WebM for embedding on your own website.

Can I trim videos?

Yes — drag the in and out points on the timeline to select the range you want. Handy for clipping a few seconds out of a longer video.

What happens to audio?

Currently, output is video-only — audio is not included. The tool is aimed at short clips for social and animation assets.

Is there a file size limit?

No explicit limit. That said, browser memory is finite — videos over 1–2 GB may fail. Trim long videos first for better stability.

How are my files handled?

Everything runs in your browser. Files are never sent to SideKit's servers or any third-party service. Your output is saved directly to your device.

Can I use this commercially?

Yes — the tool is free for commercial use. Just make sure you have rights to the input files yourself.

Which browsers and OS are supported?

The latest versions of Chrome, Edge, Firefox, and Safari. Works on Windows, macOS, Linux, iPadOS, and Android — anywhere a modern browser runs.

SideKit · Video Converter

Browser-based · No upload · No signup

Made with WebCodecs API + mp4-muxer.