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GIF to MP4

Convert an animated GIF to a video file for places that accept video. MP4 may be smaller, but the result depends on the source and destination; preview it and check the exported size.

Convert GIF to MP4

No signup · No uploads · Runs in your browser

Why Convert GIF to MP4?

GIF uses an indexed palette of up to 256 colors per frame and is usually much less space-efficient than a modern video codec for photographic motion. The actual size depends on pixel dimensions, frame count, movement, and detail; short, simple animations may remain small, while complex ones can grow quickly.

MP4 is a video container, and its size and compatibility depend on the video codec and encoding settings. Video formats can represent color beyond GIF's indexed palette and often compress motion more efficiently. This editor's output should still be checked in the target player and compared by actual file size; a specific reduction is not guaranteed.

The conversion makes sense wherever file size matters: sending via messaging apps with attachment limits, embedding in web pages where page-load performance is critical, or storing large animation libraries on disk.

GIF vs MP4: A Direct Comparison

GIF

  • • 8-bit color (256 colors per frame)
  • • No temporal compression
  • • No audio support
  • • Video playback controls and seeking
  • • Large file sizes for animation
  • • Native support in all email clients

MP4

  • • 24-bit color (16 million colors)
  • • H.264 temporal compression
  • • Full audio support
  • • Requires a video player to play
  • • Can be smaller than an equivalent GIF
  • • Blocked by most email clients

How the Conversion Works

The GIF-to-MP4 pipeline runs locally using FFmpeg WebAssembly. Three specific FFmpeg flags are applied to ensure maximum compatibility:

  1. 1

    -movflags faststart

    Moves the MP4 metadata (moov atom) to the beginning of the file. This allows the video to start playing while still downloading — essential for web embedding and social media platforms.

  2. 2

    -pix_fmt yuv420p

    Sets the pixel format to YUV 4:2:0 planar, which is required for H.264 compatibility with older decoders, iOS Safari, and all social media platforms. Without this, some players may refuse to play the output.

  3. 3

    scale=trunc(iw/2)*2:trunc(ih/2)*2

    H.264 requires video dimensions to be divisible by 2. This filter rounds each dimension down to the nearest even number, silently fixing odd-sized GIFs that would otherwise cause encoding failures.

When to Keep the GIF vs Convert to MP4

The right format depends entirely on where the animation will be displayed. GIF remains the better choice for email (MP4 is blocked by most email clients), GitHub READMEs and issues (GIF plays inline, MP4 becomes a link), and any context where automatic, player-free playback is required.

MP4 is the better choice for web pages (use a muted autoplay loop video instead of a GIF for better Core Web Vitals scores), social media platforms like Twitter/X and Instagram where MP4 is natively supported, messaging apps like WhatsApp and iMessage that play video inline, and anywhere file size is a hard constraint.

Shrink Your GIF to MP4 Now

Convert a GIF in the editor, then check the generated video in the player where you intend to use it.

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Frequently Asked Questions

How much smaller will my MP4 be compared to the original GIF?

Often, but not always. The size depends on duration, dimensions, frame rate, content, and encoding settings. Compare the actual output size and inspect quality before sharing.

Will the MP4 loop like the original GIF?

The MP4 file itself does not loop natively — looping is controlled by the player or the HTML element displaying the video. On web pages, add loop to your <video> tag. On platforms like Twitter/X and Discord, videos loop automatically when they are short enough.

Why does the output MP4 have slightly different dimensions than my GIF?

The H.264 codec used in MP4 requires video dimensions to be divisible by 2. If your GIF has an odd width or height (e.g., 481 × 271), the converter rounds each dimension down to the nearest even number (480 × 270). This is a codec requirement and the visual difference is imperceptible.

Can I use the output MP4 on social media?

MP4 is widely supported, but each service has its own codec, duration, dimension, and size requirements and may re-encode uploads. Check current destination specifications and test the exported file there.

Does the tool work with large animated GIFs?

It depends on device memory, browser, dimensions, frame count, and other running work. Large animations can slow or fail in a tab. Try a shorter or smaller source and close other memory-intensive tabs.