無料動画GIF変換ツール — あらゆる動画からアニメーションGIFを作成

MP4、WebM、MOV動画を数秒で高品質GIFに変換。完全ブラウザ内処理。トリミング、フレームレート調整、リサイズ、ダウンロード。サーバーアップロード・登録不要。

All processing happens in your browser. Videos never leave your device.

Drag & drop a video here, or click to upload

Supports MP4, WebM, MOV — max 100MB

No video added yet

How It Works

1

Upload Video

Drag & drop or click to select an MP4, WebM, or MOV file from your device. Max 100 MB.

2

Trim & Adjust

Set start/end times (up to 15 seconds), pick your frame rate, output width, and quality level.

3

Download GIF

Hit "Convert to GIF" and download your animated GIF instantly. All processing happens on your device.

Why Use Our Video to GIF Converter?

100% Private

All conversion happens in your browser using WebAssembly. Your video never leaves your device — zero data uploaded to any server.

High-Quality Output

Uses FFmpeg-powered palette generation for smooth, vibrant GIFs with optimized color reproduction.

Full Control

Trim to the exact frame, choose FPS, resize, and adjust quality. Create the perfect GIF for any platform.

Video to GIF Converter is a free, browser-based video conversion tool by Aibrify that converts MP4, WebM, and MOV files to animated GIFs without uploading data to any server. Built for social media marketers and content creators who need fast, private GIF creation with full control over trim, FPS, and quality.

Why GIFs Are Still King on Social Media

Despite the rise of short-form video platforms, GIFs remain one of the most versatile content formats on the internet. They autoplay silently in feeds, work in emails, load on virtually any device, and require no video player. Marketers, community managers, and content creators use GIFs to boost engagement, explain concepts quickly, and add personality to their communications.

Studies show that tweets with GIFs receive 55% more engagement than those without. On Slack and Discord, GIFs have become the universal language of team culture. For email marketing, animated GIFs can increase click-through rates by up to 26%.

How Video-to-GIF Conversion Works

Our converter uses FFmpeg compiled to WebAssembly, running entirely in your browser. The process involves three steps:

  1. Decoding: The video is decoded frame by frame within the selected time range.
  2. Palette Generation: FFmpeg analyzes all frames to create an optimized color palette (GIF supports up to 256 colors per frame).
  3. Encoding: Each frame is mapped to the palette and encoded into the GIF format with dithering for smooth color transitions.

This two-pass approach (palettegen + paletteuse) produces significantly better results than single-pass conversion, with smoother gradients and more accurate colors.

Optimal GIF Settings for Different Platforms

Different platforms have different requirements for GIFs:

  • Twitter/X: Max 15 MB, 640px width recommended. Auto-converts to video on mobile.
  • Reddit: No hard size limit, but keep under 20 MB. 480-640px width for feed visibility.
  • Discord: Non-Nitro users limited to 8 MB upload. Use 320-480px width and 10 FPS.
  • Slack: 480px width, 10 FPS, medium quality for quick sharing.
  • Email: Under 1 MB is ideal. Use 320px width, 10 FPS, and low quality for maximum compatibility.
  • Tumblr: Max 10 MB per GIF. 540px width fits the dashboard perfectly.

Tips for Perfect Social Media GIFs

  • Keep it short: 2-5 seconds is the sweet spot for looping GIFs that feel natural.
  • Lower FPS for smaller files: 10 FPS looks great for most content and keeps file sizes manageable.
  • Choose the right moment: Trim to capture the most impactful or expressive moment of the video.
  • Resize wisely: Larger widths mean larger files. 480px is the best balance for most social platforms.
  • Consider the loop: GIFs loop infinitely — choose clips that work well as seamless or intentional loops.
  • Test quality levels: Start with "Medium" and adjust based on the result. Text-heavy content benefits from "High".

Frequently Asked Questions

Does this tool upload my video to a server?
No. All conversion happens in your browser using FFmpeg compiled to WebAssembly. Your video file never leaves your device.
What video formats are supported?
You can upload MP4, WebM, and MOV video files. The maximum file size is 100 MB.
What is the maximum GIF duration?
You can create GIFs up to 15 seconds long. This limit keeps file sizes manageable while covering most social media use cases.
How does the quality setting work?
The quality setting controls the color palette size. "High" uses 256 colors for the best visual quality, "Medium" uses 128 colors for a good balance, and "Low" uses 64 colors for the smallest file size.
Why is the first conversion slow?
The first conversion loads the FFmpeg WebAssembly engine (~30 MB). This only happens once per session — subsequent conversions are much faster.
Which FPS should I choose?
10 FPS is ideal for most social media GIFs. Use 15-20 FPS for smoother motion. 24 FPS matches cinematic frame rates but produces larger files.
What width should I use for social media?
480px works great for most platforms. Use 320px for messaging apps or email, and 640px for high-resolution displays.
Is this tool really free?
Yes, completely free with no limits, watermarks, or signup required.
データ収集ゼロプライバシー優先GDPR準拠

最終更新: 2026-03-17 · Aibrifyチームが構築・運営 — 10,000+のマーケターが利用

Want More Marketing Tools?

Explore our full suite of free AI-powered social media tools — caption generators, hashtag tools, image compressors, and more.

Explore All Free Tools