MP4 to GIF Converter Free — Convert Video to GIF Online

You have a video clip and you need a GIF — a reaction for Slack, a demo for a GitHub README, a tutorial snippet for an email, or a meme to share. But most MP4 to GIF converters either upload your video to a server, slap a watermark on the output, or limit you to 5-second clips on the free plan.

MiOffice converts MP4 to GIF entirely in your browser using FFmpeg WebAssembly. You can trim the video first, choose quality settings, and create the exact GIF you want. No upload, no account, no watermarks.

Private & secure — your video never leaves your device.

How to Convert MP4 to GIF

1. 1

   Open the Video to GIF Converter

   Go to the MP4 to GIF converter. It loads FFmpeg WebAssembly in your browser — no download or plugin needed.

2. 2

   Upload Your Video

   Drag and drop your MP4 file (also supports MOV, WebM, AVI). The video loads into browser memory — it is not uploaded to any server.

3. 3

   Trim & Configure

   Select the start and end points to extract the exact clip you want. Shorter clips produce smaller GIFs. Adjust frame rate and quality settings for the right balance of file size and visual fidelity.

4. 4

   Download Your GIF

   FFmpeg decodes the video frames and encodes them as an animated GIF. Download the result — no watermarks, ready to share.

Why Convert MP4 to GIF?

MP4 is a better format in almost every technical measure — smaller files, more colors, better compression. So why would you want a GIF? Because GIFs work where video does not:

How to Keep GIF File Size Under Control

The biggest downside of GIF is file size. A 10-second 720p GIF can easily be 30-50 MB. Here are the most effective ways to reduce GIF size:

Expected File Sizes: MP4 vs GIF

As you can see, GIFs are significantly larger. This is why trimming and resolution matter so much. If your platform supports video, consider sharing the MP4 instead. For the reverse conversion, see our GIF to MP4 guide.

Creating GIFs for Specific Platforms

GIFs for Email Marketing

Email GIFs should be under 1 MB for reliable delivery. Keep them short (2-3 seconds), use 480p or lower resolution, and reduce to 8-10 fps. Gmail, Apple Mail, and Outlook (web) all support animated GIFs. Outlook desktop shows only the first frame — make sure your first frame communicates the message.

GIFs for GitHub & Documentation

GitHub allows GIFs up to 10 MB in README files and comments. For software demos, 5-8 second clips at 720p and 12 fps strike a good balance between clarity and file size. GitHub also supports the <video> tag, but GIFs are more universally supported across markdown renderers.

GIFs for Slack & Teams

Slack renders GIFs inline and auto-plays them. There is no strict size limit, but large GIFs slow down chat loading. Keep GIFs under 5 MB for the best experience. For longer demonstrations, consider uploading the MP4 directly — Slack plays video inline as well.

How FFmpeg WASM Powers the Conversion

MiOffice uses FFmpeg compiled to WebAssembly — the same FFmpeg that powers most video processing worldwide, running in your browser instead of on a server. When you convert MP4 to GIF:

1. 1.FFmpeg WASM loads in a Web Worker (off the main thread)
2. 2.The MP4 is decoded frame by frame using the H.264 decoder
3. 3.Frames are trimmed to your selected time range
4. 4.A color palette is generated (256 colors) using palettegen filter
5. 5.Frames are encoded as GIF with the palette using paletteuse filter
6. 6.The animated GIF is ready for download

The two-pass palette approach (palettegen + paletteuse) is the same technique used by professional video editors. It produces significantly better GIF quality than single-pass conversion by optimizing the 256-color palette for the specific content of your video.